PrfctChaos wrote: ↑
Thu Sep 10, 2020 2:18 am
Come on guys, just buy a 100 cm or 70 cm gong mast and we'll use that as the standard. It is well priced and includes a fuse. Also, their cheap alu mast / fusilage has the same fit, and can be bought cheaply or used to do the wing socket moulding. We do not need to re-invent the wheel. Just need to choose a good, inexpensive, high quality existing product as a base. And everyone can afford a gong alu setup and upgrade to the Pre-preg carbon for a bit extra as well.
If you want a underslung or overslung setup, or have a shimmable stab. It is just a case of making your stabilirer perch / mounting / socket a seperate part and then the stabiliser wing a seperate part. Then shim to your hearts content.
Gong was certainly the winner on both economy and complexity when I listed all the brands I knew of on the first page of this.
My main concern is that for prototyping a rear socket is bad for stabiliser angle adjustment.
In the foil I designed, I fabricated my stabiliser as a 1/2 scale copy of my front wing and started with the rear wing inverted but both wings at 0º angle of attack. That wasn't enough to lift the bow of the board in motion , I tried angling the front of the rear wing down 1.5º degrees, still not enough and I've currently got it at 3º which feels about right. I've seen it recommended to trim the stabiliser very slightly to adjust the foot balance positions to match footstrap placements. This could be provided for a Gong fuselage by prototyping a rear wing with a front socket a few mm higher than the square cross-section and then making wedges at different angles to offset the fuselage plug in the socket. It's king of clunky but easy enough though it would leave a small mismatch at the end of the socket to the join. I have no issues with the structural fit, I think a wing created with sockets for a Gong fuselage should have uncompromised strength if the laminations are continuous over the wing and socket's outside surfaces.
A lesser concern is simply function and aesthetics, we don't need the same strength and thickness for the rear of the fuselage.
Personally I think only the front connection is super important, it's taking weight of ourself and the board and shock loadings, torque loadings. Rear stabiliser can be over slung and doesn't need the strength of socketing. Or if it is, why not use a mast/front wing section fuselage with a hole in the back to take a 10 mm or 12mm glass fibre rod to extend out to the stabiliser?
The slight bendiness will permit easier foil pumping and turn radius control.
And the wing can be overslung with a semi-socket 3D printed for different stabiliser angles. Or directly socketed once the ideal angle is known.
PrfctChaos: have you got any dimensions for a Gong fuselage?