Thrust to weight ratio calculator for rc plane Thread OP. performanceCalc predicts: Aircraft Class: Thrust-Weight-Ratio: Take-off Distance: is based on - Full Thrust available when releasing the airplane by hand launch - for a rolling takeo-off a gradual thrust increase to reach Thrust-to-weight ratio, abbreviated as TWR is a dimensionless ratio of thrust to weight of a rocket, jet or propeller engine or anything that provides work (thrust) and has a mass that is measurable. An RC plane can generally carry a weight of between 2 lbs to 20 lbs or 0. The plane weighed 35. . Mar 26, 2014 #2 instead of thrust to weight ratio, I use watt per pound. 5:1. 33. How much RPM is needed to fly an RC plane? RPM requirements vary, but a common range might be 10,000 to 20,000 RPM, depending on the motor, prop, and plane type. Explanation Calculation Example: Suppose the weight of an aircraft is 1000 kg and the total thrust generated by its engines is 10000 N. 21. Bwalt, for your Extra to behave the way an Extra SHOULD behave you'll want at least a 1. You go by all of them together. How do you calculate thrust? Question about flying weight and thrust to weight ratio. 300g ST / 600g AUW = . *** Empty weight + 7727 lb exceeds max takeoff weight. Enter your Gear Ratio (= Propeller Pinion Teeth : Motor Pinion Teeth). Can you please help in calculating the thrust to weight ratio or what should be the thrust ratio for my fixed-wing plane Specification : Wing Span: 2 m Tail: A tail Weight: 6 kg with 6s 22000 Mah battery I am using AVROTO 3520 400KV with 15" inch pusher propeller with 100 amp esc which is giving around 3500 gm thrust is it will be okay to lift up. I have a SA100 on a 6. Press the Button [calculate]. Latest The Thrust to Weight Ratio Calculator is an invaluable tool that calculates the thrust-to-weight ratio, a critical indicator of the performance of rockets and aircraft. Rather than worry about thrust measurement, your very best bet is to use a simple system calculator (I have had my best results using eCalc) and look for a motor/battery/prop combination that gives you a power-to-weight ratio in the range of Is thrust to weight ratio based on weight of the copter alone or including payload as well? For example, say I have copter which ways 1000g and carrying a 200g camera. I find 1. However, the It includes specifications for acceptable RC plane models, such as a thrust-to-weight ratio below 0. 2lbs of thrust. 81 m/s2). g. Zephyr 3 (Flying wing) 3812g 900kv 1109 prop 0. It was very simple, and like a dope I forgot to write it down! Would anyone know how to calculate the minimum thrust requirement , in relation to the total weight of an rc model aircraft ? Is there a formula , or is there just a general concensus for the prop thrust needed ? In his brief explanation, he stated the thrust per weight ratio , was far less than most people imagine , to get the plane off Calculate the Thrust-to-Weight (T/W) ratio of a small aircraft with an empty weight of 450 kg and an engine producing 1200 N of thrust. specific Thrust: How many grams of Thrust will be produced with one Watt of electric Input Power. Discussion Thrust to Weight Ratios Electric Ducted Fan Jet Talk real planes fly with a very low thrust to weight ratio, and so do ours. Thrust to weight ratios for 3D planes? Recommend 1:1, 1. 2kg X 0. ok. If a craft needs to get into a stable orbit or land safely on the current celestial body without gliding or using Holy Thrust to Weight ratio Batman! SS ROCKET! eBird: Parkflyers: 24: Jan 21, 2003 01:08 AM: thrust to weight ratio: Joe_in_AZ: Parkflyers: 2: Jul 24, 2002 11:17 AM: Thrust to Weight Ratio??? sapok: Beginner Training Area (Aircraft-Electric) 1: Feb 23, 2002 05:21 AM: Thrust to weight ratio: Frank B: Electric Plane Talk: 6: Oct 19, 2001 07:08 AM I'm looking over the rules of the NASA USLI competition, and one of the requirements is that a "launch vehicle shall have a minimum thrust-to-weight ratio of 5:1" I understand the concept of thrust-to-weight ratio itself, but am confused about how/when one would calculate this parameter. BossChase: Beginner Training Area (Aircraft-Electric) 8: May 18, 2018 06:14 PM: Thrust to Weight Ratio??? sapok: Beginner Training Area (Aircraft-Electric) 1: Feb 23, 2002 05:21 AM: Thrust to weight ratios (twin series or parallel) Van: Electric Power Systems: 9: Feb 17, 2002 10:46 AM The thrust to weight ratio is calculated by dividing the total thrust produced by an aircraft’s engines by the total weight of the aircraft. Airspeed is speed of aircraft measured with respect to air mass Airspeed = Inertial speed if wind speed = 0 IAS=2(p Thrust-to-Weight Ratio T W=T mg,"g"s Wing Loading W S,Nm 2orlbft2 21 Historical Factoid Can someone help me understand how to use the Static thrust calculator that is often quoted when discussing engine hp numbers? Static Thrust Calculator - STRC This is a common format I see when results are tabulated 3300 rpm with 72" Prop = 988. The thrust-to-weight ratio tells how well your plane can climb and speed up. 6lbs X 0. ive use the thrust calculator which in theory says my motor/prop can give 2 pounds of thrust. However, thrust alone is not enough to guarantee the plane to fly, since other factors, such as Pitch Speed If you simply want a good sport model a 1:1 thrust/weight ratio is all you need. Now remember this is a rule of thumb and is only a suggested starting point. I have a 6s 70mm yak and according to my scale it only has a 0. You must know the type of plane and the size and weight before thinking of the power and speed you need from the motor/prop. New posts Search Bluetooth Enabled Race Data Logger and Speed Tracker for RC Cars and Planes. An aircraft with a high thrust to weight ratio has high acceleration. 4: 1 on trainer models from get the best performance for your RC airplane! fast & reliable simulation - no more guessing the only performace tool in the Web ☆ over 1 million calculations per month Use this airplane design calculator to help you determine key airframe dimensions along with an approximate target weight and power for your radio control aircraft. 2 3 Next. A commercial airliner has a maximum takeoff weight of 50000 kg. Depending upon our requirement we determine the following wing parameters - a. A higher thrust to weight ratio allows for better acceleration, shorter takeoff distances, and improved climb rates. 5:1 or even 1. Calculate thrust to weight ratio with precision. 5 pounds of thrust. 3: 1 to 0. 9: 0. There is no dependence of these results on the thrust to weight ratio because this parameter has little influence in the landing phase. Most of the measurements were performed using a Hobbico Nexstar trainer aircraft (wingspan 69 inches, weight as tested with fuel tank half full was 7. Enter Power in Watts NOTE: If Unknown, leave blank. It is an important parameter in the design and performance analysis of rockets, aircraft, and other vehicles that rely on thrust for propulsion. New posts Search RC Car, Boat, Plane, Rocket, and Quadcopter Rapid Warehousing. 1 kilos, 2. The plane is closer to 7 pounds on take off so that is only 1. r/KerbalSpaceProgram. When a drone is hovering in place (in a no-wind condition), the thrust is equal to the weight of the drone: Weight = mass x gravity (9. 213 kg thrust/909 kg weight = 23. Input engine thrust in Newtons and vehicle weight in kilograms to determine performance capabilities for aircraft, rockets, or vehicles. That ratio is commonly thrust = 25-30% of aircraft weight How would one calculate the thrust-to-weight ratio for a minimum turn radius? 6. The thrust-to-weight ratio is calculated using the formula: \[ TWR = \frac{T}{W} \] where: \( TWR \) is the thrust-to-weight ratio, \( T \) is the total thrust (N), \( W \) is the total weight (kg). The input value for the calculations: the lift-to-drag ratio, 'L over D') L / D is estimated on the basis of a simple approximation calculation. 3 % thrust to weight ratio. to remove ads between posts. The thrust-to-weight ratio calculator is an online tool that allows you to calculate the thrust-to-weight ratio of an aircraft or spacecraft. I am talking measured thrust, not theoretical from prop thrust calculator. 7 lbs of Static Thrust at 77 Degrees with a (3) blade prop at . Also grams (kilograms is the default) is a unit of mass. This video is for users who have previously purchased the product, which is no longer availa But what is the thrust to weight ratio that one should shoot for, on an EDF jet? Does that depend on the performance desired? With prop planes, I'm used to going by watts per pound to determine what I want. What is its thrust-to-weight ratio? Calculator Apps. $26. ! Aircraft - Electric - Airplanes Electric Plane Talk Data Power to weight ratio for RC planes in metric; Thread Tools: Sep 05, 2013, 12:57 AM #1; RC Aerobat. Here is a FT thread with more information. Aircraft Weight and Balance – How to calculate – Important; Share on Facebook. This is equivalent to a reduction of the aspect ratio, producing the wellknown equation for K: K 1 Ae (5. Efficiency: Enter the efficiency of the propeller Jet airliners run a thrust to weight ratio well under 1:1, but then again they aren't beginner RC pilots that fly them, nor are they subject to heavy maneuvers from trying to recover nose dives or dodging obstacles. But a lot depends what your plane design is. In absolute figures, however, the power requirements of our little aeroplanes are surprisingly The weight of the plane in kg (strictly speaking mass) has to be converted into a weight-force by multiplying with the gravitational acceleration (a=9. Will it work? Related RC plane RC vehicle Hobbies forward back. For most flight conditions, an aircraft with a high thrust to weight ratio will also have a high value of excess thrust. As a rule of thumb, 75% thrust to weight is fine, but 1 to 1 is better. The drone’s propellers therefore need to produce 343 N or 35 kgf of thrust for the drone to hover. I am sure most will have weight, wing sq in, and suggested fan size listed. The other issue is that pitch-speed is important - the prop needs to be producing thrust when the plane is moving, not stationary. Wing Area (sq in) Weight (oz) Power in Watts: FSA / Exhaust Exit Diameter Calculator - (Thrust Tube Page) Inner Fan Case Diameter: RC Airplane Design Calculator; Float Plane Calculator; RC Boat Calculator. 5:1 or 2:1? Sign up now. A glider could fly with thrust-to-weight of 0. Needs The thrust-to-weight ratio is calculated by dividing the thrust (in SI units – in newtons) by the weight (in newtons) of the engine or vehicle. 2kg or 2. you can trim out down thrust easier than right thrust. Thrust-to-Weight Ratio AI supported calculatorn; Gear Design in 3D & Learning RC plane weight distribution is key to how well a plane flies. Bear in mind that bench test thrust figures are achieved on a very high C rating with huge Lipo mAh packs. For aircraft, the quoted thrust-to-weight ratio is often the maximum static thrust at sea level divided by the maximum takeoff weight. These two ratios are both very reflective of the design philosophy and objectives of any particular airplane. Mark Wood. This calculator provides the Thrust-to-weight ratio of an aircraft. 27: Boeing F15: 4. 6:1, and your plane weighs 1. (Wikipedia: Thrust-to on its thrust-to-weight ratio of an aircraft [3]. please help: khaled_abobakr: Electric Power Systems: 22: Aug 29, 2012 06:20 AM: Discussion: is there a maximum thrust to weight ratio? TheSelf: Electric Plane Talk: 30: Jun 26, 2011 02:53 PM: Discussion: thrust/weight ratio for gliders? RC_Bob: Electric Plane Talk: 75: Mar 28, 2011 03:01 PM: Thrust to Check out our thrust-to-weight ratio calculator to learn the importance of weight and the thrust needed to lift it off the ground. Weight varies with fuel burn and payload changes. The engines produce a total thrust of 480000 N. If the thrust (power) is more than the weight of the airplane it will fly straight up. Then, add your scores for the free-response questions. ratio of the motor/s but that actual ratio of the total thrust FORCE vs the WEIGHT of the model. We split the total drone weight into three main components: Drone weight is the weight of the main body – the Aspect Ratio, Taper Ratio and on the shape of the wing tips. RCI FE Boat Calc - The amount of thrust needed depends on how you want to fly. 2381 and add the free-response scores to get the total score out of 120 AP Human Geography Score Calculator Basic Calculator Advanced Calculator Enter any 3 values to calculate the A slowflyer might have a 1:4 T/W ratio and an extreme racer a 4:1 ratio. It's estimated weight is around 15-16 pounds with about 15. This calculator provides the weight-to-thrust ratio of an aircraft. e. For RC planes you wouldn't even attempt to hover unless your plane has 2:1 thrust-to-weight $\endgroup$ – slebetman. Having a large ratio is only needed for hovering, and wild aerobatics. 2. Apr 02, 2007, 02:50 AM #2; vintage1. Except Mig-19 all other less MTOW(Maximum Take-Off Weight) fighter planes are omitted. 5 pound plane pulling about 11 pounds of thrust. 54:1 when all the engines were running at full power. What is the thrust-to-weight ratio for a Cessna 172? The thrust-to-weight ratio of a Cessna 172 can vary depending on the specific model and engine configuration. This is the reason I am using two brushless motors. The math required to calculate the velocity at launch of a given rocket and a given engine is A high thrust to weight ratio indicates that the aircraft will have a strong rate of climb and acceleration. RPM: Enter the revolutions per minute of the propeller. C_D, K, L/D. , a modern full-sized jet fighter has a thrust/wt. The weight the plane can carry will depend on the aircraft’s wingspan and surface area, thrust-to-weight ratio, construction materials, internal space, and prevailing weather conditions. 5G, w/ Even a plane that has a thrust/weight ratio less than 1. In order to takeoff of the ground, the static thrust should be greater than 1/2 of the planes' weight. 8 lbs, designed for use methods to calculate the thrust coefficient for APC propellers. This combo probably crashes more planes than a high thrust gets them out of trouble. I can also take off in 20-25 feet so I feel like these numbers don’t make sense. To use this calculator, fill in all the required fields with numerical values: Propeller Diameter: Enter the diameter of the propeller in inches. so we'll double the plane's weight to 20lbs. I e got an EDF with a thrust of 1. A model aircraft can not be flown or it just barely To oversimplify, thrust to weight ratio 1:1 means that it can pull its own weight, so that is very capable aerobatic plane, more that 1:1 and you are able to hover and serious 3D, less that 1:1 and you need to pick up speed for aerobatics and fly more "scale-like". Thread starter Adam3836; Start date Oct 20 RC Car, Boat, Plane, Rocket, and Quadcopter Rapid Warehousing. Unless you are comparing 2 planes which have identical weight, it is useless. 75 – 0. It does this by looking at two important ratios, the thrust-to-weight ratio (T/W), the wing loading or ratio of weight-to-planform area (W/S). If this is a plane that is built as scale from an actual plane then look at the amount of thrust the original has for a starting point for your own model. The typical range for a Cessna 172 is around 0. Propeller Pitch: Enter the pitch of the propeller in inches. i. A correct incidence of the stabilizer and alignment of vertical fin is also something to look at if it requires excessive trimming. Calculate the thrust to weight ratios in the data table. The amount of forward thrust generated d This thrust-to-weight ratio calculator assists engineers in estimating the thrust-to-weight ratio of a vehicle. With length of 0. A 7oz plane, a 20 oz plane, a 40 oz plane and a 6 pound plane all fly entirely different at the same wing loading. More likely you'll want more like a 1. What does it mean to have a high thrust-to-weight ratio? A high thrust to weight ratio indicates that the aircraft will have a In order to get reasonable climb and acceleration capabilities, the Static Thrust should be at least about 1/3 of the planes' weight. The thrust-to-weight ratio quantifies an aircraft’s performance potential by measuring the thrust produced by its engines relative to the aircraft’s weight. 6 thrust to weight ratio but that plane has no shortage of power in the air. Aircraft Input Parameters. 85 Large turbopropeller A spacecraft has a mass of 1000 kg and produces a thrust force of 500 kN. 81 m/s2 (1 g)). A balanced plane flies smoothly and is easier to control. I have made several large jets with low thrust to weight ratios. Thrust-to-weight Ratio Calculation. 5 lb UCD w/ Saito 100 swinging 15x4W @ 10300 rpm, according to ThrustHP has 2. Note that this airfoil still produces lift at negative geometric angles of attack. In the case of models the power must be translated into thrust. Measuring static thrust only tells you half the story. Edwinzea> As a rule of thumb, you need at least 1lb of thrust to fly a 3lb model. In a sense I want to calculate "backwords": If I know the "normal" thrust to weight ratio for an electric glider, I can then calculate which motor/gearbox/propeller combinations will give me this number. 2 thrust-to-weight ratio. 5. The largest was the Arado 555 that had 6 of my own design engines of 3. What should I use to cover this plane with? 4. But with EDF jets, you can't really go by that, can you? Free online Electric Motor and Propeller performance calculator helps you estimate Efficiency, Output Power, Current draw, Propeller Thrust and RPM. I have been flying foamies for about two years and I have flown the stratos, super cub, cessna 1400mm, p- Drone Thrust to Weight Ratio. The wing loading is going to be around 39 ounces a square Best power to weight ratio for a smaller DF: 66tbird: Electric Ducted Fan Jet Talk: 0: Mar 16, 2005 12:32 PM: Is there a rule of thumb for AC weight to Ski size. Now i'll use the general static thrust rating for an eng ( 1hp = appr 6. Thrust To Weight Ratio Affects RC Plane Size. 7 lbs Static Thrust. Wing Loading and Power Calculator - RC EDF Calculator. As you can see from the factors we have discussed that limit the size of an RC plane, most of the factors relate to the thrust-to-weight ratio of the plane. In most cases, i choose my max airspeed according to max windspeed i want my aircraft to fly into. characters welcome! so as the others have stated 200 watts/pound and about a 2:1 thrust to weight ratio is a good place to be. 75 oz plane is far more than you need to keep it in the air and enough to do a full aerobatic routine with a little energy management. Sonething that big is going to need a monster sized motor, with a large prop. 5: 1 means that the thrust is half the weight, with this in mind, for gliders or light and slow-flying model aircraft, a ratio of between 0. It's a bit harder to quantify thrust to weight, as thrust drops off with speed, but 1:2 is about the minimum - so you should be fine. If I was going to build this plane, I would opt for the 2:1 thrust to weight ratio rather than the 1:1. 73 thrust ratio 25 mph stall, 40 mph cruise at 55% throttle. Compare the thrust to weight ratios in airliners, fighter jets, and executive jets. Forums; Magazine; Blogs; Classifieds; Places; More; Search Aircraft - Electric - Airplanes Electric Plane Talk Discussion thrust/weight ratio for gliders? Page 1 of 6: 1. The Kerbal Space Program * Klimov States that Thrust as "Take-off emergency mode" ** The conditions for 21,829lbf Emergency Thrust are limited to 3 Minutes and Altitude less than 4000m. 2 lb = 909 kg Cessna. The thrust equation is as Thrust Coefficient Vs Advance Ratio 11X8 APC Prop 11X4 APC Prop. It all depends on if you want the minimum amount of thrust, or if you want enough thrust to get you out of a hairy situation. A lot Discussion thrust/weight ratio for gliders? Electric Plane Talk. I have build that is roughly 1500 grams rounded up or 3. Keeping your thrust to weight ration better then 1:1 is so much more beneficial to all skill levels of RC flying. 021, or so. Most fliers use the average, but the minimum can be just as important when determining if a flight might be stable. It weighs 1. Hence, the aircraft performance will be at its best. Or in some cases the power-to-weight ratio (P/W) is used instead of T/W. 96 thrust ratio 26 mph stall 43 mph cruise at 55% throttle. Reply Space_Boss Increasing the thrust to weight ratio . 7: 0. The thrust can also be measured in pound-force (lbf), provided the weight is measured in pounds (lb). 19. However, for many RC planes, aspect ratios in the range of 5:1 to 8:1 are common and offer a good balance of lift and efficiency. As you mention, planes can fly with a fairly low thrust to weight ratio. 2 meters. S800 Reptile Matek F411 auto launch question. Rc Glider Discus Rc Model Model Airplanes Radio Control Gliders Aircraft able to control the power of each flap, each one producing an added thrust. These are Skywalker 2600kv brushless motors. 5 easily, but if you want to go vertical you need a ratio of 1 or more. Calculate the thrust-to-weight (T/W) ratio for a rocket with an average thrust force of 100 kN and a ST/AUW = Static Thrust-to-Weight Ratio. In other words: the "lift to drag ratio" is a parameter for total aircraft aerodynamics efficiency whereas the "thrust to weight ratio" is an efficiency factor for total aircraft propulsion. Motor / prop thrust to plane weight so now that you are running 2 motor / prop you can add the power to determine the thrust to weight ratio but you must understand that the pane is now heavier cause of the 2 motors / esc. Drag Coefficient is a dimensionless quantity Simplisticly if the plane had a 1:10 l/d ratio then to maintain level flight would need thrust= 1/10th of weight. 1:1 and a The thrust-to-weight ratio is a simple ratio of thrust to weight of a flying object such as a rocket. A war bird or one with a little zip will be 100-150%. As for getting out of trouble, you add much more weight and torque with larger engines. 1+ thrust-to-weight ratio. The reason i ask is because prop driven planes doesn't need much power and speed to control it comfortably. 5 But that is not all - you need an appropriate prop. Quote: The thrust-to-weight ratio varies continually during a flight. 5, you can fly the bageeses out of a sport jet that have a thrust to weight of more that 1 as an example, i scratch built a jet (1/8 IAI LAVI) that weights approximately 22lbs T/O weight (with fuel) powered by a 12lbs turbine with a pipe on a hot humid day. RC Aerobat. With the 12x8 on motor spec sheet i get about 4000-4200g of thrust. 9 CF 72" x 10 = 988. Identify your peak power requirements based on the all-up-weight and airplane Calculate the Thrust-to-Weight Ratio of your propulsion system with this simple online calculator. 6 = 720g. However, due to the “ram ratio” effect from the aircraft forward speed, extra air is taken into the engine so that the mass airflow and also the jet velocity increase with aircraft speed. Oct 30, 2024. 81 = 343 N. 2 Kg thrust. As the overall weight of this RC plane is 1306 grams. The thrust-to-weight ratio is a measure of the amount of thrust produced by the engines of the aircraft or Thumb rules for thrust: Trainer with low wing loading - 100watts/kg or 50% thrust/wt Mild aerobatics - 200watts/kg or 1:1 thrust/wt Fully aerobatic - 300watts/kg or thrust=wt x 1. A slow flying trainer, the thrust will need to be 60-80% of the weight of the plane. I like knowing that I have power on tap to pull me out of something. By shortening the right Glide ratio at v =15m/s 1/7 Thrust Beginners - thrust weight ratio - First offi'm not a noob when it comes to rc planes and flying,. This fundamental metric is expressed mathematically as: Thrust to Weight Ratio = Thrust (in pounds or Newtons) / just wondering has anyone found the website rocketry calculator reliable/accurate for determining thrust to weight ratios and as far as general rule of Forums. How much thrust does my RC plane need? For a basic flight, aim for around 1:1 thrust-to-weight ratio. Related RC plane RC vehicle Hobbies forward back. 0 will climb -- it just won't climb straight up. Takeoff. but the question might be My skill level is somewhere inbetween sport flying and 3d flying. 7°, giving a lift to drag ratio of 4. Aerodynamic Stability in RC Planes. My Guide To Thrust Most sport and scale type planes will have a little over a 50% power ratio ( about 0. 6lbs, you can calculate the power of the engine required as follows. 6 thrust to the weight ) a 3D type will often be a 1:1 ratio or slightly more. My 7. Suppose an aircraft generates a thrust of 120,000 N and has a total weight of 25,000 kg. Calculates the Propellers Static Thrust and Absorbed Power. get the best performance for your RC airplane! fast & reliable simulation - no more guessing the only performace tool in the Web ☆ over 1 million calculations per month Aircraft Class: - Thrust-Weight-Ratio: - :1 Take-off Distance: - m Stall Speed (clean): - km/h Best Range (Carson) Speed: - km/h max. 6 lbs thrust)to decide what eng. 9kg to 9kg. Most large helicopters (the real world ones, not RC) have a payload that is usually about 1/2 of that they weigh, a thrust to weight ration of 1. The weight (N) is calculated by multiplying the mass in kilograms (kg) by the acceleration due to gravity (m/s 2). vintage1. 20. 3 lbs and the motor I plan to use is is a CTI Forums. The aeroplane would be able to accelerate vertically if the thrust to weight ratio is larger than one. 2, the airspeed is 150 m/s, and the wing’s cambered surface has a chord length of 0. Unless you are a helicopter. Or. Whether you're designing an RC drone or a full-fledged aircraft, you can determine whether the thrust-to-weight ratio of your design is to your liking using this calculator. Different prop lengths will mandate the need of varying off sets, some planes need it others don't. This Performance Calculator predicts RC airplane performance in dynamic as well as in static (3D) flight conditions. The only thing that counts is the thrust to drag ratio. The Other Dave: Electric Plane Talk: 0: Mar 17, 2003 07:17 PM: Rule of thumb for center of gravity: spark363: Modeling Science: 4: Jul 05, 2002 03:31 PM: Gear drives effect on power The model aircraft we build and fly have absurd thrust-to-weight ratios which is a lot of fun, but not even close to necessary for effective flight. How to use the Thrust to Weight calculator in Rocket Calculator. Current 2M pattern planes typically have a hp per ounce ratio of around 0. Cubic Loading Thrust / Weight oz/ft 3 /1 Power / Weight Stall Speed mph Kmh Aspect Ratio : Remarks (if any): Airspeed [Km/h] Estimated max level flight airspeed: mph Km/h: CDoL: Disclaimer RC plane thrust and weight . 6:1 Pull out is very good. Commented Sep 24, not aircraft weight. 55. 5. It can be either a maximal or peak, average, or minimum thrust-to-weight ratio. 6 = 1. at an L/D ratio of 20:1 you need a thrust ( at the given airspeed ) of just 1/20th of the weight Oct 25, And set Thrust = Drag and Lift = Weight In reality the plane's speed will be lower than the speed of the air coming 18. 7:1 ratio to ensure easy hovering and adequite break away power from hovering. GSM020 SK-500023 RCJuice. Thrust refers to the force produced by the motor or engine that propels the plane forward. wing loading/ power to weight ratio to ROW: barn buster 50: Electric Plane Talk: 0: Jun 20, 2003 10:52 PM: Thrust:weight ratio > 1 on a living room flyer! drliu: Scratchbuilt Indoor and Micro Models: 5: Aug 17, 2002 10:57 PM: thrust to weight ratio: Joe_in_AZ: Parkflyers: 2: Jul 24, 2002 11:17 AM: Thrust to Weight Ratio??? sapok: Beginner It's probably the least useful measure of how a plane will fly there is. This is calculated using a simple formula: thrust-to-weight ratio equals the total thrust (in pounds or kilograms) divided by the total weight of the aircraft (also in pounds or kilograms). This means(as a rule of thumb), Max airspeed= Max windspeed x 1. 15 to 0. The thrust-to-weight ratio (TWR) can be calculated by dividing the mass and thrust in any unit (e. If you have 1 kg of thrust and you aircraft weighs 1 kg that is a one to one ratio. If you remember from science class that force equals mass times acceleration (F=MA), then you can calculate the force of gravity on your rocket from its mass using earth's gravitational An easy way to estimate power needs for RC hobby applications is to use 100 watts per pound for sport flying, 150 for aggressive aerobatics, 200 watts per pound for 3D flying. You can also divide the engine's HP by the model's weight in ounces to get the HP per ounce. newtons), then dividing the gravity to get the result (Earth's gravity is 9. 20, meaning the thrust is approximately 15% to 20% of the aircraft’s weight. By comparing thrust to weight, designers can predict the acceleration and maneuverability of their vehicles. 99 Twin & Multi Engine RC Aircraft - Thrust to weight ratio - Awhile back someone had a great formula for multi engine models as to the thrust to weight ratio. A: Thrust to weight ratio is a critical factor in aircraft design as it determines the aircraft’s ability to take off, climb, and maneuver. for propeller weight compensation) Power-Weight: Power Weight Ratio Thrust-Weight: Thrust Weight Ratio - flying below 0. So to ensure safety, can I rely on OpenRocket, or should I calculate the How to Use the Propeller Thrust Calculator. Multiply the correct multiple-choice answers by 1. A large dia with small pitch (eg, 10x4) will give lot of thrust but low forward speed. Thread starter geegeegood; Start date Feb 18, 2020; Tags motor choice geegeegood New member. The thrust-to-weight ratio and lift-to-drag ratio are the two most important parameters in determining the performance of an aircraft. An aircraft that has slightly more thrust than drag will keep on accelerating until it doesn't. Lets say that on the ground at full power you get 3 pounds of thrust and a prop pitch speed of 40 mph and your motor is Calculate. As an example, if the thrust-to-weight ratio is in good value, the performance of its aircraft propulsion also will be at its best. get the best drive for your RC airplane! fast & reliable simulation - no more guessing most comprehensive motor database ☆ over 1 million calculations per month On a new notecheck this formula ( using a 10lb plane still ). Check out the thrust of given fans that are compatible, as you did for the "Skyangel Mini 50mm EDF jets". Thrust to Engine Weight Ratio Thrust to Airplane Weight Ratio; Boeing 747-400: 6. For ex. So if you can achieve 1:3, you'll have an extremely responsive unit, considering what an experienced pilot can do with a 3D heli at a 2:1 thrust to weight ratio. Calculate the angle of attack (AOA) of an aircraft wing when the lift coefficient is 1. In the United States, what are the legal distinctions between a rocket powered RC plane, an actively stabilized model rocket, and a drone? The Minimum Thrust required for given Weight is the least amount of propulsive force needed to sustain level flight while supporting the aircraft's weight, achieving this minimum thrust typically involves optimizing the aircraft's aerodynamic Thrust to weight ratio? I’m making a pusher prop glider with a 2000mm wing span. If we want a Static Thrust-to-Weight Ratio of . In theory my WQ230 would have a T/W ratio in excess of 11:1 if going by QMF's bench test figures but I doubt my lowly 1300mAh 4S (alleged 60C) lipos allow it to acheive anywhere near that. Conclude by explaining why certain types of planes require a higher thrust to weight ratio. Less than 50W/lb - very lightweight / low wing loading slow flyer. The recommended build material when using the design parameters for the Propeller Thrust calculator for Model Aircraft. Best recoil spring weight for beretta 92 estimated equilibrium angle of 13. 1. 100% is used short time in special parts of a maneuver. 35 Stunrt Plane should be 40 ounces or less. Any more than 2:1, and you are carrying too big a motor So Hunter, interesting question! We (the powered aircraft, that is!) need thrust to fly however, thrust is just one part of the equation. 5 thrust-to-weight ratio ? 6000g or so? If it was it's lower kv brother , 4xx-5xx kv , it could spin the 15x10 prop , but the 660kv is too much. 3: 0. Always make the motor / prop counter rotating systems. If you have a trainer plane that has a power-weight ratio of 0. 3 Many of my planes take of at less than 50% and fly normal at very low throttle. Thrust varies with throttle setting, airspeed, altitude and air temperature. If i want a 2:1 thrust to weight ratio, should I design it so that the thrust is 2400g or 2000g? Is there an official method for which this value relates to? Thrust-to-weight ratio is the ratio of instantaneous thrust of rocket and jet engines to aircraft or rocket weight. I was wondering what the optimum TWR of a plane should be. 4 is almost impossible. Some cheap r/c flying toys you purchase at your local toy store have a ratio of 0. you can fly at a very scale manner with a thrust to weight ratio of 0. Also bear in mind that for prop driven plains thrust generally decreases as airspeed increases so static thrust may be a poor indication of actual thrust available at flying speed I see what you are saying. Model Rocketry Handbook: 21st Century Edition RC Jets - Best thrust to weight ratio ducted fan jet? - Hi, what is the best ducted fan jet in terms of thrust to weight ratio, limited by a budget of around $100-200? of course it depends on the weight of the plane itself. For Thrust-to-weight ratio is a measure used in aerospace engineering to assess the power-to-weight ratio of a vehicle, typically an aircraft or a rocket, it compares the amount of thrust generated by the propulsion system to the weight of the vehicle and is represented as TW = C D /C L or Thrust-to-Weight Ratio = Drag Coefficient/Lift Coefficient. for $2-300 you wont find much . A given amount of power as it relates to the gross weight of the aircraft. Pro plane crasher. 10. Calculated Values include: Wing Loading, Performance Style, Stall Speed, Typical targeted Peak Speed, Power per pound, performance style according to power Its a ratio, so it should all be in whatever unit of force you want to use (Newtons if you want to adhere to scientific standards). Registered User. If the thrust to weight ratio is greater than one and the drag is small, the aircraft can accelerate what is the right thrust to weight ratio for an rc plane with 1 rear mounted motor? Sign up now. The thrust-to-weight ratio is crucial data when it comes to designing an aircraft, be it a smaller remote-controlled (RC) drone or a full The power/weight ratio can be expressed as follows: 0. Members Online. Another example. The g/W unit is usually seen describing thrust rather than power loading, but I suppose it could go either way if one were so inclined. 8KG and was wondering what a safe weight for the plane should be to fly effectively. 75 and a maximum wingspan of 1. For example 70 to 80 watts per pound for an average airplane not to be underpowered. 67: Boeing 737-300: 4. Speed (Level): Aircraft - Electric - Airplanes Beginner Training Area (Aircraft-Electric) Discussion Good wing loading ratio (weight to wing area) Thread Tools Apr 04, 2012 , 05:54 PM First, enter the number of multiple-choice questions you answered correctly. 5 from a surface that has a low rolling friction coefficient (pavement over The thrust-to-weight ratio (TWR) is a ratio that defines the power of a craft's engines in relation to its own weight. Enter Model Weight in oz. The chart below also lists the roughly-comparable glow Not the power/wt. The thrust-to-weight ratio varies continually during a flight. The best aspect ratio for an RC plane depends on the specific design and purpose of the aircraft. 5, that means the static thrust of the motor, the thrust of the motor when it is being held still and not moving through the air, will need to be 300g. You can To understand the concept of thrust-to-weight ratio, it’s important to first understand the individual factors of thrust and weight and how they affect the performance of RC planes. we'll go for a 2:1 static thrust ratio in choosing an eng. When I say "normal" I mean that the plane should be able to climb reasonably well. 2:1 is not very often achieved with a glow motor. The thrust-to-weight ratio is the ratio of the thrust generated by the engine in relation to the aircraft’s weight. 8m, high aspect ratio wings, and mass between 0. Aspect Ratio bombers = 4 to 5 aerobatic plane = 5 to 6 Normal powered flight = 5 to 7 sail planes = 8 to 16 gliders = > 16 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright power to weight ratio. I'm just getting started in rocketry and encountered a number of blogs that recommend a minimum 5:1 thrust to weight ratio between the rocket and engine Forums. Block 5 "CRUISE" represents the cruise analysis that provides a minimum value for the thrust-to-weight ratio as a function of the wing loading: Tmg fmS Ranger EX (Standard airplane) 4212g 1000kv 1006 prop 0. 25) After Torenbeek [5R2], table 5-4 collects typical values of e for various classes of subsonic airplanes, in the cruise configuration: Aircraft type Oswald factor e High subsonic jet aircraft (*) 0. Thrust varies with throttle setting, airspeed, altitude, air temperature, etc. When you calculate the thrust margin you have to take into consideration the max airspeed speed you want to achieve. 81) So if the mass of the drone is 35 kg for example: Weight = 35 x 9. 5 and 1 kg, how much fast should i set it's stall speed to be and how much fast is the average flight of a simmilar plane ? Thanks in advance. High excess thrust results in a high rate of climb. The Old Timers would say that a competitive FOX . 3: What are the four forces that act on an aircraft? Lift, weight, thrust, and drag; What are three things that determine the weight of an airplane? Size, materials used in construction In order to calculate the ground roll, we need to write the equations of motion for the The key ingredients of A are the thrust to weight ratio and the ground friction coefficient. in level flight anyway. Page 7 of 14 Discussion What is the normal thrust to weight ratio of a flying wing? Will I have enough power? Flying Wings You can run it through this Flying Wing CG Calculator: Thrust to weight ratio: Frank B: Electric Plane Talk: 6: Oct 19, 2001 07:08 AM: RC Airplane Calculator. 4 lbs, and I have a motor that outputs 1kg, 2. Total Drive: Drive Weight: weight of all components (with 10% margin, e. Reply cbf1232 • • Edited for the thrust-to-weight ratio Tmg/( )⋅ . 7:1 to be noticeably better than 1. RC Warbirds and Warplanes - Giant Scale Spitfire (Thrust to Weight Ratio) and characteristics - Hey guys! Ive been building a giant scale spitfire with a wingspan of around 81 inches. The calculator will evaluate and display the Thrust to Weight Ratio. I ca ntell you that a byron fan puts out about 13-15 lbs of thrust but they arent Ahoy, aspiring rocket scientists! 🚀 Ready to calculate the ultimate power-to-weight ratio for your space explorations? Behold, the Thrust to Weight Ratio Calculator! But before we ignite the engines, let’s unveil the formula that propels us to the stars: Thrust to Weight Ratio Formula: TWR = Thrust (lbs) / Weight (lbs) A model aircraft can not be flown or it just barely stays in the air if the thrust to weight ratio is less than 1/3= 0. The TWR is calculated as follows: How to determine the minimum thrust to weight ratio for a fixed-wing aircraft? 3. Last Thread Tools: Mar 27, 2011, 01:23 AM #1; RC Guru. For aerobatics or faster flight, higher ratios are beneficial. 5 Kg so had a thrust to weight ratio of 0. I usually aim for that because I know it's safe. ratio > 1:1, where ">" indicates "greater than". $42. Power: Enter the power input in watts. 3 meters. New to the hobby question. Calculate the Dimensions of your Plane based on the drawings above: By courtesy of I am designing a new rc plane ( neither a fast plane neither a glider ) and I need to set a stall speed to design the wing accordingly. I'm not as experienced in EDFs/pushers as prop planes but I use to have 70mm F35 that has 1:1 power weight ratio. Obviously gliders can fly with no power at all, so there's no critical lower-limit. Follow us. A 3D plane will need 150-200% thrust to plane weight. 8. hp is needed for my desired 2:1 thrust ratio. For aircraft, the quoted thrust-to-weight ratio is often the Input aircraft weight and wing area to determine the wing loading, crucial for assessing aircraft performance and stability. 25:1 thrust to weight ratio. What is its thrust-to-weight ratio? An aircraft engine produces a thrust force of 20,000 N and has a weight of 4000 N. Especially for RC planes that don't Will a rc plane fly if it weighs around 130g with batteries and has 70g of thrust? What kind of rc plane could i make with that thrust to weight ratio? Rocket Thrust-to-Weight Ratio Calculation 19 Oct 2024 Tags: Aerospace Engineering Rocketry Rocket Propulsion Thrust-to-weight ratio of rockets calculation. 50 thrust ratio 20 mph stall 34 mph cruise at 60% throttle; RVJet (Flying Wing) 4444g 910kv 1308 prop 0. List any plane from the data table that can accelerate vertically. Determine the rate of climb for an aircraft with a mass of 2000 kg, an airspeed of 120 km/h, and a thrust-to-weight ratio of 1. In order to determine the performance of an aircraft based on their thrust-to-weight ratio, firstly But it feels like I have a 1. It flies like 1. Post on X. Hope this helps. 5 thrust-to-weight, because its vertical acceleration looks like 0. Determine flight characteristics of your plane including wing loading, stall speed. The plane weights about 4000g everything included. 1 prop clockwise and the other spinning counter clockwise. I've never flown competitive stunt and never questioned that rule of thumbuntil recently I plugged the numbers into a static thrust calculator and found that a 10 x 6 APC spinning at 9500 rpm produces 41 ounces . Calculating Aircraft Performance: TWR Estimation 13 Oct 2024 Tags: Aerospace Engineering NASA SLS Vehicle Thrust-to-weight ratio calculation Popularity: ⭐⭐⭐. A typical plane, 80-100%. How to calculate thrust for 5kg RC plane. 56lbs. Oct 15, 2006, 02:15 PM #2; Mark Wood. Each motor is capable of producing over +1000 grams of thrust. Topics of Interest Calculation Example: The thrust-to-weight ratio (TWR) is a dimensionless quantity that measures the ratio of the thrust force generated by an engine to the weight of the vehicle it is propelling. How does one calculate the thrust to weight ratio. Example Calculation. 5 oz of thrust for a 13. Is that enough for a pattern plane or should I look for a better motor with at least 1. I’ve been relying on OpenRocket for flight safety, but I realized just last weekend that it doesn’t display the thrust-to-weight ratio, and it doesn’t flag the simulation if the value is less than 5:1 (or 4:1, or 3:1). EDF and pusher type planes doesn't have prop wash and you need speed and power and to get a bite from your control surfaces. 25. but that would not give any margin for climb. r/RCPlanes. With L/D ratios from 5:1 to 40:1 that means a thrust to weight ratio of anything from 1:5 to 1:40 is enough to fly the plane. Feb 18, 2020 You will need at least 1:1 thrust to weight ratio unless it’s got a very large wing. At a given airspeed its the weight, divided by the lift-to-drag ratio of the wing at that speed, times the airspeed. Enter the total thrust (N) and the total weight (kg) into the Thrust to Weight Ratio Calculator. A good estimate for a personal aircraft thrust requirement would be more like 25% of aircraft weight, and remember, the "ton" of Cessna includes fuel and pilot too! So: 1 ton x 2000lb/ton x 1kg/2. New posts Search Thrust to weight ratios rocketry calculator. The calculator will calculate the larger The overall weight of this RC Plane after adding all the electronics is 1306 grams. 30: Boeing F18: 5. Therefore we want to maximize the thrust (and minimize the weight) and to take off. pgqwi aeodo aycs cxbym nzban finvn fnmuz llydl pxckjd vimq