stanislavz
Well-Known Member
This thread is special case of this one : https://www.homebuiltairplanes.com/forums/threads/devfus-foam.32338/ and one special persone
I was asked, to design and help build an fuselage of ul class high wing. Now, as a prototype do come fk-9
Happy part - front will be combined - metal tube frame for structural / crash protection. Tail - only composite. So - all from door rear edge to tail - is composite. And yes - it is with some pros and cons.
For pros - it is a perfect part to be made in a foil-on-foam mold, possible to mold in one piece.
For cons - you have 4 point to connect it to tube frame. But tube frame itself is "main connector for all main/heavy parts".
Pros - connector in composite aircraft is a hard thing to design and build
Question - which kind of data is necessary for calculations ?
Should it be done as stressed skin with some support walls later added ? Or all could be incorporated in a single step using precutted \_/ pieces of foam in one single process ?
Like this :
As i see it - biggest isuue here would be wall buckling under load.
Inspiration/design philosophy - do it nice on both sides, and as fast as possible, by using clever/smart solutions.
Should i add here some vision on possible wing building ?
I can call it as a corrugated plastic construction, with non-load bearing foam formers.
I was asked, to design and help build an fuselage of ul class high wing. Now, as a prototype do come fk-9
Happy part - front will be combined - metal tube frame for structural / crash protection. Tail - only composite. So - all from door rear edge to tail - is composite. And yes - it is with some pros and cons.
For pros - it is a perfect part to be made in a foil-on-foam mold, possible to mold in one piece.
For cons - you have 4 point to connect it to tube frame. But tube frame itself is "main connector for all main/heavy parts".
Pros - connector in composite aircraft is a hard thing to design and build
Question - which kind of data is necessary for calculations ?
Should it be done as stressed skin with some support walls later added ? Or all could be incorporated in a single step using precutted \_/ pieces of foam in one single process ?
Like this :
As i see it - biggest isuue here would be wall buckling under load.
Inspiration/design philosophy - do it nice on both sides, and as fast as possible, by using clever/smart solutions.
Should i add here some vision on possible wing building ?
I can call it as a corrugated plastic construction, with non-load bearing foam formers.
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