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38 votes

Why aren't aircraft built with carbon fiber tubes?

If you're going to build from carbon fibre, you generally aren't going to bother with a very "old fashioned" structural method like tube and fabric; you're going to go with the natural ...
John K's user avatar
  • 132k
27 votes
Accepted

Why aren't aircraft built with carbon fiber tubes?

A few are. The Carbon Corsair is an ultralight built with a fabric-covered frame of CFRP tubes for the fuselage. source This is an all-new design. Using CFRP tubes allowed it to have a +6/-4 g limit ...
Therac's user avatar
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12 votes

Why aren't aircraft built with carbon fiber tubes?

In addition to the other great answers, consider some drawbacks of carbon. E.g. Fibreglass will be more wear resistant than carbon fibre, which is why you prefer it on leading edges, etc. (see first ...
Marco's user avatar
  • 221
4 votes

Airliner sharp wing tip vs elleptical

Airliners have some boundary conditions which make elliptical wings less preferable. Wing sweep. A swept, elliptical wing suffers lift loss at its center and will easily see its tips stall first at ...
Peter Kämpf's user avatar
3 votes
Accepted

How is a turboprop engine mounted to the wing?

As usual an image is worth more than a thousand words (cutaway source): As visible, the engine is mounted enclosed inside a truss structure (composed for example by the beams 191 and 199) ...
sophit's user avatar
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3 votes

How is a turboprop engine mounted to the wing?

A turboprop isn't really different from the answers given in the question you link to. There is typically a frame of tubes that hold the engine and take the loads back to the wing. The frame will ...
Rob McDonald's user avatar
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3 votes

Airliner sharp wing tip vs elleptical

An elliptical lift distribution is optimal in terms of induced drag. It can be achieved by an elliptical planform (with a straight span and un-cambered airfoils and no twist), or by twisting a more ...
Rob McDonald's user avatar
  • 12.7k
1 vote

Why aren't aircraft built with carbon fiber tubes?

@John K makes many salient points in that to obtain the major advantages of carbon fiber construction you would forego the tube and joint structure in favor of a custom made monocoque structure with ...
Romeo_4808N's user avatar

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