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Questions about the different choices that aircraft designers (typically aerospace engineers) make in order to create an aircraft.

2 votes
1 answer
573 views

How do KFm step airfoils work?

I was looking for airfoils, and I came across an interesting design. It's called a KFm1 step airfoil. Those of you in model aircraft design might have heard of it. However, I've never really seen one …
Nicholas's user avatar
  • 678
5 votes
1 answer
17k views

Where is the best center of gravity?

I'm designing a plane, and I have a question. What is the best place for the center of gravity, relative to the center of lift? I've heard that it's best put just behind the center of lift, but I woul …
Nicholas's user avatar
  • 678
-2 votes
3 answers
597 views

Can an electric aircraft self-recharge? [closed]

I'm trying to design an aircraft with a long range, and I thought that an electric aircraft with a generator powered by the motor would be able to do that. However, I've seen very few of these commer …
Nicholas's user avatar
  • 678
1 vote
2 answers
289 views

What happens in a turbine high-temp combustion?

I'm designing an aircraft, and I notice that in high bypass turbofan engines, the fuel is used at relatively low temperatures. So I'm wondering, what happens if the fuel is burned at high temperatures …
Nicholas's user avatar
  • 678
3 votes
2 answers
2k views

Why aren't ceramics used in turbines?

I have seen that ceramics take a lot of heat to melt (3240º F). So, I'm wondering, why aren't ceramics used as the compressor levels in turbines? Is there something to do with the strain? or is cerami …
Nicholas's user avatar
  • 678
6 votes
2 answers
2k views

What fuels can turbofans burn?

I know that Jet-A is the fuel most often used for turbofans, but is there something else that these engines can burn? (ethanol, LPG, methane, butane, 100LL, etc.) Basically, can a turbofan burn anythi …
Nicholas's user avatar
  • 678