Questions tagged [aerodynamics]

Use with questions about the interaction of air with and around parts of an unmanned aircraft.

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10 votes
4 answers
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Do aerodynamics scale for model aircraft?

If I wanted to make a scale model plane that looked like a real aircraft, could I just scale down all of the measurements of the actual aircraft to make a model aircraft with similar flight ...
Jacob B's user avatar
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10 votes
1 answer
572 views

How to determine the correct specification of servo for a control surface

Servos come in a large range of sizes, torque values, etc. and the servo to use depends on a number of factors such as control surface size, aircraft speed and desired manoeuvrability. While there is ...
Kralc's user avatar
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8 votes
1 answer
809 views

What is the typical glide ratio of Kline-Fogleman airfoils?

Kline-Fogleman (KFm) airfoils, despite their seeming contradiction with known principles of aerodynamics, seem to be very popular in RC modelling, and are known to have a peculiar stall behavior, with ...
FlashCactus's user avatar
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6 votes
2 answers
138 views

Question about Mars Ingenuity helicopter's wide-chord blades

I marveled at the two flight videos today on YouTube by Perseverance helicopter flights during Ingenuity mission. Got me thinking. Why aren’t the helicopter blades wider? I would like to think that in ...
John Greene's user avatar
5 votes
1 answer
273 views

How do thrust requirements change as a multirotor leaves ground effect?

Assuming either a quadcopter or a hexacopter, is there any published data on how much more energy is expended to escape the ground effect? Is it a function of the thrust being produced to lift the ...
HansenJC001's user avatar
4 votes
1 answer
172 views

What is the most thrust dense copter configuration?

I need to make a compact drone that does not need to be fast, nor very power efficient*. I wanted to know what is the most mass I can lift with the smallest footprint**. To make this question more ...
user27221's user avatar
  • 173
4 votes
1 answer
205 views

Using BMP280 as an altimeter for CanSat

Situation: Me and my student team want to use a BMP280 air pressure sensor connected to an Arduino Nano to measure the altitude of a CanSat. A CanSat is a coca cola can-shaped and can-sized aerial ...
Caeleste's user avatar
  • 143
3 votes
2 answers
1k views

How do I calculate thrust for a quadrocopter?

I am designing a quadrocopter style aircraft that uses a 20 inch propeller 1.625 inches in width and has a pitch of 8 inches. How do I calculate static lift / thrust and the dynamic thrust / lift ...
Gabriel Kusiak's user avatar
3 votes
1 answer
95 views

How do aerodynamics for small model aircraft differ from that of larger aircraft?

I am reading an aerodynamics textbook (Introduction to Aerodynamics by Anderson). I am still in the chapters that deal with subsonic aerodynamics, which seems to have a focus on life-sized manned ...
Flux's user avatar
  • 343
3 votes
1 answer
60 views

How to account for propeller (fixed pitch) in model aircraft performance calculations?

I'm working on performance calculations for a plane I'm building. By setting the sum of my drag formulas (one for the wing, one for the fuselage, both with predicted drag coefficients) equal to the ...
RanchAero's user avatar
3 votes
1 answer
86 views

How to couple panel method velocities with boundary layer equations to obtain viscous pressure and lift coefficient?

I have calculated CP(pressure coefficient) and CL(Lift coefficient) for a NACA2412 airfoil using the panel method but as it only allows us to calculate the same for inviscid flow, I could not get the ...
Twisampati Roy Chowdhury's user avatar
3 votes
0 answers
41 views

How to calculate frictional losses in convergent nozzles and convergent-divergent nozzles?

I have searched up a lot of articles and papers relating the subject but not satisfied with the results. Most of them are showing the losses in pipes which I already know from Darcy-Wiesbach equations ...
Twisampati Roy Chowdhury's user avatar
1 vote
3 answers
41 views

Are there any formulas for acceleration to max speed time/distance

I'm working on optimization code for a RC Plane competition. I'm trying to figure out both the distance and the time between when the plane takes off and when it reaches max speed. I already have ...
Ankit's user avatar
  • 111
1 vote
0 answers
21 views

Effective Area estimation for drag calculation in coaxial quadrotor

I have a coaxial quadrotor with a propellor size of 34 inches & i want to calculate effective rotor area for drag calculation.what will be the area whether it is summation of both upper & ...
falcon's user avatar
  • 71
0 votes
1 answer
100 views

How much torque do I need for the servomotor which turns my canard?

I don't know that my question is belong to here or physics community. I desire to make a supersonic micro-jet model plane also powered by model rocket engine to reaches less than Mach 3 and it has a ...
Curious guy's user avatar