revhed wrote:Update,
DIY alu flys GREAT!
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Costs
STRUT, with shipping 100 E
Alu board plate 20 E
Double wall alu Fuse 12 E
Carbon, epoxy wings 75 E
M8, M6 A-4 counter sunk SS, inox hardware inserts 20 E
Drilled, counter sunk holes holes, screws 8mm= 4, 2 baseplate, 2 for fuse
6mm=8, 4 baseplate, 2 each wing
As built for a bigger guy F wing is about 700 cm2
Observations,
On the heavy side but not extreme.
STRUT very stiff in both twist and flex. Durable, great clean profile.
Test board way to small for a big beginner.
Holes need to be drilled PERFECT for good alignment, drill press, factory lines on fuse help a lot.
90° angles are easy to get spot on.
The M8s were carefully cut to enter the STRUT as much as possible, and seems both connections are strong.
Wings can be layed up on curved male mold as described in first post.
Maybe Zeeko STRUT would be a little better as has 3 M8 holes.
Fully breaks down, different fuse and STRUT lengths can be tested quickly.
Off to a shallow spot, just mount a 70 cm long STRUT, want to fly the waves, go for a 1 meter, 4 bolt change out.
Needs product, tufgel or similar, between Stainless, inoxable, hardware and Alu, care taken to tighten but not overly, no need to manhandle to risk damage to Alu threads.
Because a composite STRUT and fuse is hard to get right and LOTS of work, this idea should be a GREAT option!
Why buy a "funny foil" when you can build the same basic design your own and so much better for so much less!
R H