Thrust to weight ratio calculator for rc plane RPM: Enter the revolutions per minute of the propeller. Obviously gliders can fly with no power at all, so there's no critical lower-limit. 9:1 thrust to weight ratio. 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. If we want a Static Thrust-to-Weight Ratio of . Determine flight characteristics of your plane including wing loading, stall speed. (Wikipedia: Thrust-to 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. newtons), then dividing the gravity to get the result (Earth's gravity is 9. Enter Power in Watts NOTE: If Unknown, leave blank. 2 meters. Most sport and scale type planes will have a little over a 50% power ratio ( about 0. New to the hobby question. Thrust-to-Weight Ratio AI supported calculatorn; Gear Design in 3D & Learning A given amount of power as it relates to the gross weight of the aircraft. 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 The thrust-to-weight ratio and lift-to-drag ratio are the two most important parameters in determining the performance of an aircraft. If the thrust to weight ratio is greater than one and the drag is small, the aircraft can accelerate Question about flying weight and thrust to weight ratio. 6 thrust to the weight ) a 3D type will often be a 1:1 ratio or slightly more. High excess thrust results in a high rate of climb. 5:1. 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. Note that this airfoil still produces lift at negative geometric angles of attack. So to ensure safety, can I rely on OpenRocket, or should I calculate the 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. RC Airplane Calculator. When I say "normal" I mean that the plane should be able to climb reasonably well. 2 3 Next. Our thrust-to-weight ratio calculator is here to help you estimate one of the essential parameters for aircraft design 🛩️- the trust-to-weight ratio. 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 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. Click the “Calculate” button to obtain the Thrust-to-Weight Ratio. to remove ads between posts. Using the drone thrust formula: thrust = (4/1) × 800 = 3200 g. Now i'll use the general static thrust rating for an eng ( 1hp = appr 6. 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. Suppose an aircraft generates a thrust of 120,000 N and has a total weight of 25,000 kg. Each motor is capable of producing over +1000 grams of thrust. This calculator provides the Thrust-to-weight ratio of an aircraft. but the question might be My skill level is somewhere inbetween sport flying and 3d flying. 100% is used short time in special parts of a maneuver. 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 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: 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. , a modern full-sized jet fighter has a thrust/wt. Measuring static thrust only tells you half the story. 1 prop clockwise and the other spinning counter clockwise. Zephyr 3 (Flying wing) 3812g 900kv 1109 prop 0. 5 pounds of thrust. A balanced plane flies smoothly and is easier to control. 5 lb UCD w/ Saito 100 swinging 15x4W @ 10300 rpm, according to ThrustHP has 2. If the thrust (power) is more than the weight of the airplane it will fly straight up. 5 Kg so had a thrust to weight ratio of 0. In order to get reasonable climb and acceleration capabilities, the Static Thrust should be at least about 1/3 of the planes' weight. so we'll double the plane's weight to 20lbs. With the 12x8 on motor spec sheet i get about 4000-4200g of thrust. 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. Best recoil spring weight for beretta 92 estimated equilibrium angle of 13. Free online Electric Motor and Propeller performance calculator helps you estimate Efficiency, Output Power, Current draw, Propeller Thrust and RPM. Speed (Level): A slowflyer might have a 1:4 T/W ratio and an extreme racer a 4:1 ratio. Compare the thrust to weight ratios in airliners, fighter jets, and executive jets. Thrust-to-weight Ratio Calculation. In most cases, i choose my max airspeed according to max windspeed i want my aircraft to fly into. A higher thrust to weight ratio allows for better acceleration, shorter takeoff distances, and improved climb rates. ratio > 1:1, where ">" indicates "greater than". Thread starter geegeegood; Start date Feb 18, 2020; Tags motor choice geegeegood New member. 85-. Thrust varies with throttle setting, airspeed, altitude, air temperature, etc. 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. 4 to 0. 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. Having a large ratio is only needed for hovering, and wild aerobatics. 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. 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 For 3D flying, it's more common to see 2+:1 power to weight ratios, so a screaming punchout from a hover is possible. 5. You can also divide the engine's HP by the model's weight in ounces to get the HP per ounce. 1+ thrust-to-weight ratio. 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? real planes fly with a very low thrust to weight ratio, and so do ours. 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 The overall weight of this RC Plane after adding all the electronics is 1306 grams. Less than 50W/lb - very lightweight / low wing loading slow flyer. But a lot depends what your plane design is. New posts Search RC Car, Boat, Plane, Rocket, and Quadcopter Rapid Warehousing. What should I use to cover this plane with? 4. 5:1 or 2:1? Sign up now. 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. Takeoff. Enter Model Weight in oz. 5. 9kg to 9kg. C_D, K, L/D. If I was going to build this plane, I would opt for the 2:1 thrust to weight ratio rather than the 1:1. Thread OP. As also do 3D aerobatic RC helis which must have a rotor lift force many times Even a plane that has a thrust/weight ratio less than 1. 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. Registered User. 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. The drone’s propellers therefore need to produce 343 N or 35 kgf of thrust for the drone to hover. 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. The only thing that counts is the thrust to drag ratio. A lot greater, as do lightweight indoor-type EPP 3D aerobatic models. 81 m/s2). A specific Thrust: How many grams of Thrust will be produced with one Watt of electric Input Power. we'll go for a 2:1 static thrust ratio in choosing an eng. 19. 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 Drone Thrust to Weight Ratio. ! So Hunter, interesting question! We (the powered aircraft, that is!) need thrust to fly however, thrust is just one part of the equation. For example 70 to 80 watts per pound for an average airplane not to be underpowered. How to Calculate Thrust to Weight Ratio? The following example problems outline how to calculate Thrust to Weight Ratio. In the case of models the power must be translated into thrust. Unless you are a helicopter. A war bird or one with a little zip will be 100-150%. 2 Kg thrust. 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 Thrust-to-weight ratio is the ratio of instantaneous thrust of rocket and jet engines to aircraft or rocket weight. It is an important parameter in the design and performance analysis of rockets, aircraft, and other vehicles that rely on thrust for propulsion. Topics of Interest 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. An aircraft with a high thrust to weight ratio has high acceleration. 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. Is that enough for a pattern plane or should I look for a better motor with at least 1. Thrust varies with throttle setting, airspeed, altitude and air temperature. 35 Stunrt Plane should be 40 ounces or less. 2 thrust-to-weight ratio. Example Calculation. Unless you are comparing 2 planes which have identical weight, it is useless. Last Thread Tools: Mar 27, 2011, 01:23 AM #1; RC Guru. i. Will it work? Related RC plane RC vehicle Hobbies forward back. It was very simple, and like a dope I forgot to write it down! Thrust to weight ratio? I’m making a pusher prop glider with a 2000mm wing span. Total Drive: Drive Weight: weight of all components (with 10% margin, e. 8 - red: it is very hard to stay in air with 0. The wing loading is going to be around 39 ounces a square 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. 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. I have been flying foamies for about two years and I have flown the stratos, super cub, cessna 1400mm, p- 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). 5 thrust-to-weight, because its vertical acceleration looks like 0. 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 configuration to reduce drag while maintaining the necessary lift to counteract the weight and is represented as T = (P dynamic *A*C D,0)+((W RC plane weight distribution is key to how well a plane flies. Furthermore, it can answer queries like “How do I calculate thrust?” or “What is the thrust-to-weight ratio?” With applications for aircraft, boats, drones, and even rockets, this calculator provides results for different scenarios, including 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. I e got an EDF with a thrust of 1. 81 m/s2 (1 g)). For 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. From this, we determine the thrust required from each motor using: thrust per motor = thrust/number of motors. 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 This Performance Calculator predicts RC airplane performance in dynamic as well as in static (3D) flight conditions. Hope this helps. Page 7 of 14 Ranger EX (Standard airplane) 4212g 1000kv 1006 prop 0. Mark Wood. 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 calculate share Thrust-Weight Ratio: indication for flight performance - green: it’s the fun range, 0. As for getting out of trouble, you add much more weight and torque with larger engines. 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. 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. Aerodynamic Stability in RC Planes. 99 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 A spacecraft has a mass of 1000 kg and produces a thrust force of 500 kN. How to use the Thrust to Weight calculator in Rocket Calculator. In order to takeoff of the ground, the static thrust should be greater than 1/2 of the planes' weight. 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. Efficiency: Enter the efficiency of the propeller Not the power/wt. A commercial airliner has a maximum takeoff weight of 50000 kg. 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 Simplisticly if the plane had a 1:10 l/d ratio then to maintain level flight would need thrust= 1/10th of weight. 3 Many of my planes take of at less than 50% and fly normal at very low throttle. 021, or so. What is its thrust-to-weight ratio? Calculator Apps. you can fly at a very scale manner with a thrust to weight ratio of 0. Commented Sep 24, not aircraft weight. The prop with P/D ratio of 1/2 yields higher thrust at low airspeed, but gives lower top airspeed. Input engine thrust in Newtons and vehicle weight in kilograms to determine performance capabilities for aircraft, rockets, or vehicles. For RC planes you wouldn't even attempt to hover unless your plane has 2:1 thrust-to-weight $\endgroup$ – slebetman. 8m, high aspect ratio wings, and mass between 0. Bwalt, for your Extra to behave the way an Extra SHOULD behave you'll want at least a 1. It weighs 1. It flies like 1. Thrust refers to the force produced by the motor or engine that propels the plane forward. 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. Oct 30, 2024. Calculate thrust to weight ratio with precision. I usually aim for that because I know it's safe. Follow us. 21. Also grams (kilograms is the default) is a unit of mass. 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. 5 easily, but if you want to go vertical you need a ratio of 1 or more. Input aircraft weight and wing area to determine the wing loading, crucial for assessing aircraft performance and stability. 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. 5oz of thrust on a 13oz. 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. RCI FE Boat Calc - How to calculate thrust for 5kg RC plane. 73 thrust ratio 25 mph stall, 40 mph cruise at 55% throttle. Members Online. This combo probably crashes more planes than a high thrust gets them out of trouble. 96 thrust ratio 26 mph stall 43 mph cruise at 55% throttle. what is the right thrust to weight ratio for an rc plane with 1 rear mounted motor? Sign up now. Most fliers use the average, but the minimum can be just as important when determining if a flight might be stable. It's probably the least useful measure of how a plane will fly there is. The thrust equation is as Thrust Coefficient Vs Advance Ratio 11X8 APC Prop 11X4 APC Prop. The thrust-to-weight ratio is the ratio of RC plane thrust and weight . By shortening the right Glide ratio at v =15m/s 1/7 Thrust It includes specifications for acceptable RC plane models, such as a thrust-to-weight ratio below 0. Wing Loading and Power Calculator - RC EDF Calculator. Example: Suppose you have a The reason i ask is because prop driven planes doesn't need much power and speed to control it comfortably. I see what you are saying. 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. 3 % thrust to weight ratio. To use this calculator, fill in all the required fields with numerical values: Propeller Diameter: Enter the diameter of the propeller in inches. Discussion Thrust to Weight Ratios Electric Ducted Fan Jet Talk 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. The aeroplane would be able to accelerate vertically if the thrust to weight ratio is larger than one. Now remember this is a rule of thumb and is only a suggested starting point. For aircraft, the quoted thrust-to-weight ratio is often the 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. On a new notecheck this formula ( using a 10lb plane still ). For aerobatics or faster flight, higher ratios are beneficial. Apr 02, 2007, 02:50 AM #2; vintage1. The chart below also lists the roughly-comparable glow and gasoline power systems for reference. 81 = 343 N. This video is for users who have previously purchased the product, which is no longer availa Thrust To Weight Ratio Affects RC Plane Size. In the United States, what are the legal distinctions between a rocket powered RC plane, an actively stabilized model rocket, and a drone? 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? But it feels like I have a 1. 0 will climb -- it just won't climb straight up. Calculated Values include: Wing Loading, Performance Style, Stall Speed, Typical targeted Peak Speed, Power per pound, performance style according to power 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. 8. 5 But that is not all - you need an appropriate prop. 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. Reply Space_Boss Aspect Ratio, Taper Ratio and on the shape of the wing tips. List any plane from the data table that can accelerate vertically. Any more than 2:1, and you are carrying too big a motor 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. 3: 1 to 0. Reply cbf1232 • • Edited for the thrust-to-weight ratio Tmg/( )⋅ . Feb 18, 2020 You will need at least 1:1 thrust to weight ratio unless it’s got a very large wing. 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 The thrust-to-weight ratio varies continually during a flight. 4 and lower; Remark: The The plane reaches max level flight speed when the Thrust becomes equal to Drag. How much thrust does my RC plane need? For a basic flight, aim for around 1:1 thrust-to-weight ratio. Calculate the thrust to weight ratios in the data table. 2 lb = 909 kg Cessna. 300g ST / 600g AUW = . 25) After Torenbeek [5R2], table 5-4 collects typical values of e for various classes of subsonic airplanes, in the cruise Rocket Thrust-to-Weight Ratio Calculation 19 Oct 2024 Tags: Aerospace Engineering Rocketry Rocket Propulsion Thrust-to-weight ratio of rockets calculation. 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. Explanation Calculation Example: Suppose the weight of an aircraft is 1000 kg and the total thrust generated by its engines is 10000 N. Whether you're designing 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. 8 and more - yellow: flyable 0. For example, let's say your quadcopter drone weighs 800 g in total, and you chose a thrust-to-weight ratio of 4:1. Mar 26, 2014 #2 instead of thrust to weight ratio, I use watt per pound. By comparing thrust to weight, designers can predict the acceleration and maneuverability of their vehicles. Calculate. Especially for RC planes that don't Discussion thrust/weight ratio for gliders? Electric Plane Talk. Aircraft Input Parameters. An RC plane can generally carry a weight of between 2 lbs to 20 lbs or 0. ok. 81) So if the mass of the drone is 35 kg for example: Weight = 35 x 9. 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. but that would not give any margin for climb. Latest The best aspect ratio for an RC plane depends on the specific design and purpose of the aircraft. get the best drive for your RC airplane! fast & reliable simulation - no more guessing most comprehensive motor database ☆ over 1 million calculations per month I have made several large jets with low thrust to weight ratios. The TWR is calculated as follows: 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). How to determine the minimum thrust to weight ratio for a fixed-wing aircraft? 3. This is the reason I am using two brushless motors. 4 lbs, and I have a motor that outputs 1kg, 2. 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. You go by all of them together. Weight varies with fuel burn and payload changes. 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. 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. 7°, giving a lift to drag ratio of 4. The amount of thrust needed depends on how you want to fly. To calculate thrust, multiply the exhaust velocity (vv) by the mass flow rate (dm/dtdm/dt). 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 . 1:1 and a The Old Timers would say that a competitive FOX . 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 This calculator provides the weight-to-thrust ratio of an aircraft. ship is about . 4 is almost impossible. 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. $42. 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. Power: Enter the power input in watts. thrust = thrust-to-weight-ratio × total drone weight. 5:1 or even 1. 5:1 or even 1:1 is a good way to measure. Pro plane crasher. How to Use the Propeller Thrust Calculator. Oct 15, 2006, 02:15 PM #2; Mark Wood. Sonething that big is going to need a monster sized motor, with a large prop. 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 An aircraft that has slightly more thrust than drag will keep on accelerating until it doesn't. The plane weighed 35. Another example. New posts Search Thrust to weight ratios rocketry calculator. 25:1 thrust to weight ratio. e. I was wondering what the optimum TWR of a plane should be. 213 kg thrust/909 kg weight = 23. How do you calculate thrust? 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. Current 2M pattern planes typically have a hp per ounce ratio of around 0. Thread starter Adam3836; Start date Oct 20 RC Car, Boat, Plane, Rocket, and Quadcopter Rapid Warehousing. 20. 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. 8KG and was wondering what a safe weight for the plane should be to fly effectively. The thrust-to-weight ratio varies continually during a flight. 8 lbs, designed for use methods to calculate the thrust coefficient for APC propellers. 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 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. The calculator will calculate the larger I am sure most will have weight, wing sq in, and suggested fan size listed. The last step is dividing the total thrust by the number of motors. 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. Whereas the prop with P/D ratio of 1/1 To calculate the thrust to weight ratio, divide the total thrust by the total weight. The other issue is that pitch-speed is important - the prop needs to be producing thrust when the plane is moving, not stationary. This means(as a rule of thumb), Max airspeed= Max windspeed x 1. A large dia with small pitch (eg, 10x4) will give lot of thrust but low forward speed. For aircraft, the quoted thrust-to-weight ratio is often the maximum static thrust at sea level divided by the maximum takeoff weight. Depending upon our requirement we determine the following wing parameters - a. power to weight ratio. But for general flying, a 1. Always make the motor / prop counter rotating systems. I like knowing that I have power on tap to pull me out of something. A slow flying trainer, the thrust will need to be 60-80% of the weight of the plane. 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. The thrust-to-weight ratio (TWR) can be calculated by dividing the mass and thrust in any unit (e. 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. These are Skywalker 2600kv brushless motors. 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. For your plane, 10. The largest was the Arado 555 that had 6 of my own design engines of 3. RC Aerobat. 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. Example Problem 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 Enter the weight of the object in newtons (N) in the respective input field. vintage1. 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. 50 thrust ratio 20 mph stall 34 mph cruise at 60% throttle; RVJet (Flying Wing) 4444g 910kv 1308 prop 0. However, the About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright 18. A glider could fly with thrust-to-weight of 0. 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. Post on X. Conclude by explaining why certain types of planes require a higher thrust to weight ratio. For most flight conditions, an aircraft with a high thrust to weight ratio will also have a high value of excess thrust. 7:1 ratio to ensure easy hovering and adequite break away power from hovering. A typical plane, 80-100%. Increasing the thrust to weight ratio . g. There is no dependence of these results on the thrust to weight ratio because this parameter has little influence in the landing phase. It's estimated weight is around 15-16 pounds with about 15. 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 thrust-to-weight ratio is a measure of the amount of thrust produced by the engines of the aircraft or The thrust-to-weight ratio is a simple ratio of thrust to weight of a flying object such as a rocket. Propeller Pitch: Enter the pitch of the propeller in inches. The engines produce a total thrust of 480000 N. . Check out the thrust of given fans that are compatible, as you did for the "Skyangel Mini 50mm EDF jets". Thrust to weight ratios for 3D planes? Recommend 1:1, 1. Calculate the Dimensions of your Plane based on the drawings above: By courtesy of The drone motor calculator multiplies the total weight of our drone by the thrust-to-weight ratio and displays this value – in our case, 2100 grams – as the full thrust required for our drone. More likely you'll want more like a 1. Calculating Aircraft Performance: TWR Estimation 13 Oct 2024 Tags: Aerospace Engineering NASA SLS Vehicle Thrust-to-weight ratio calculation Popularity: ⭐⭐⭐. 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. 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 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. At a given airspeed its the weight, divided by the lift-to-drag ratio of the wing at that speed, times the airspeed. The typical range for a Cessna 172 is around 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 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. My 7. r/RCPlanes. Aircraft Weight and Balance – How to calculate – Important; Share on Facebook. 1 kilos, 2. S800 Reptile Matek F411 auto launch question. With length of 0. The plane weights about 4000g everything included. 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. 15 to 0. But with EDF jets, you can't really go by that, can you? 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. If you have 1 kg of thrust and you aircraft weighs 1 kg that is a one to one ratio. 2lbs of thrust. Quote: 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). As a rule of thumb, 75% thrust to weight is fine, but 1 to 1 is better. for propeller weight compensation) Power-Weight: Power Weight Ratio Thrust-Weight: Thrust Weight Ratio - flying below 0. 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. For ex. ratio of the motor/s but that actual ratio of the total thrust FORCE vs the WEIGHT of the model. 20, meaning the thrust is approximately 15% to 20% of the aircraft’s weight. 6 lbs thrust)to decide what eng. 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 ive use the thrust calculator which in theory says my motor/prop can give 2 pounds of thrust. 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. 75 and a maximum wingspan of 1. It can be either a maximal or peak, average, or minimum thrust-to-weight ratio. 54:1 when all the engines were running at full power. 5G, w/ This is equivalent to a reduction of the aspect ratio, producing the wellknown equation for K: K 1 Ae (5. Drag Coefficient is a dimensionless quantity 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. As the overall weight of this RC plane is 1306 grams. in level flight anyway. 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. hp is needed for my desired 2:1 thrust ratio. The thrust-to-weight ratio tells how well your plane can climb and speed up. When you calculate the thrust margin you have to take into consideration the max airspeed speed you want to achieve.
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