Questions tagged [fixed-wing]

For questions about aircraft that use wings to generate lift.

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11
votes
4answers
1k 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 ...
4
votes
1answer
42 views

Is it possible to control an RC plane using reaction wheels?

I recently had an idea involving reaction wheels and a model airplane. Would it be possible to control an RC plane using reaction wheels rather that servos and control surfaces? Would a reaction wheel ...
9
votes
1answer
1k views

Why does moving the centre of gravity forward increase stability of a plane?

It's a common saying that "A nose heavy plane flies poorly, a tail heavy plane flies once", but why does moving the centre of gravity backwards or forwards change the stability?
4
votes
2answers
168 views

What is the purpose of adjusting the thrust angle for model aircraft?

I have a few model aircraft and know that the motor is often slightly offset. I have heard conflicting reasons as to why this is done. Some people claim it is because of motor torque and other people ...
2
votes
1answer
46 views

“Rogallo wing” balsa rubber-band model plan - do you have one?

Several decades ago - 4 or 5 at least - I saw a plan in a model aircraft magazine for a very simple rubber-band driven plane that used a piece of a dry cleaner bag (thin plastic wrap style) as a ...
10
votes
1answer
68 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
65 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
3answers
75 views

Can I run two motors off of one ESC?

Normally, a dual-motor plane has two ESCs but could I connect two brushless motors to one ESC? What would happen to the torque and speed of each of the two motors connected to the ESC?
6
votes
1answer
67 views

What are the typical methods of constructing a large airframe?

When building a 5 feet wingspan UAV, what building techniques: used on smaller aircraft can't scale to aircraft of this size? are best used on aircraft of this size? Ideally, I want a simple ...
6
votes
1answer
56 views

How can I set up differential thrust for a model airplane?

I have a Taranis Qx7 Radio and built an FT Mighty-Mini Scout which flew great, but now I want to put an extra motor and fly it using differential thrust. My understanding is that it needs to be set up ...