mandiw wrote: ↑Sun Sep 02, 2018 11:38 am
great job. did you already design a rear wing? if yes, can you also upload the file to thingiverse? thanks
Sure, did design some wings. First this one:
I wanted to be able to print it a once. So it was sized to fit in the build volume of the printer. It was printed vertically in PETG material. Vertical printing orientation makes it weak, but I tried it on the water, and did not break.
Then I designed and printed this one:
It's printed leading edge down on the build plate. With this shape, even with a small printer it is possible to print a large back wing at once. And because of this orientation, it's much stronger. This one I did not try yet. I am concerned about the flex of the top part.
Then I designed this one:
I have not printed this yet. But its fixed to the fuselage both on the top and bottom surfaces. So it should be both stiff and strong. Also the sides of the wing double as vertical stabilizers.
Thingiverse link to the back wings:
https://www.thingiverse.com/thing:3080738
Next, I am planning a version which I can change AOA on the water, without swapping shims.
BTW, I have updated the front wing on Thingiverse, with:
-Shim to mount on an aluminum 2x2cm fuselage
-Split to 3 or 5 pieces for easier printing with alignment holes
-A version called "Hammerhead". Same wing surface with a flat leading edge. The aim is easier lamination. Just fold epoxy impregnated fiberglass over the wing. Put it in a storage vacuum bag till the epoxy hardens.
Added Fusion 360 files only