Questions tagged [aerodynamics]

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

Filter by
Sorted by
Tagged with
10
votes
4answers
2k views

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 ...
10
votes
1answer
114 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 ...
8
votes
1answer
311 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 ...
6
votes
2answers
77 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 ...
5
votes
1answer
140 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 ...
4
votes
1answer
133 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 ...
4
votes
1answer
31 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 ...
3
votes
2answers
676 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 ...
3
votes
1answer
68 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 ...
3
votes
1answer
31 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 ...
3
votes
0answers
21 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 ...