I don't follow how this works. Would you show it fully deployed, please?
Lol, your uncertainty is well founded.
It is not completed, so doesn’t make sense yet.
The notch will hold the brake stop (would be a “rotor stop” if this was a helicopter.). The brake stop also doubles as a band displacer.
This is a standard “double tape hinge” which I learned/stole from QCR (Qualified Competition Rocketry, IIRC, great company, good rockets , crappy instructions) , been out of business a while.
My problem with standar single and double tape hinges Is they come loose pretty quickly. This is where the sewing does the trick.
I have also learned that if the far lateral edges of the tape hinge are “hell for stout”, as
@lakeroadster likes to say, the mid portion of the hinge is superfluous. Sewing floss into the hinges provides tremendous strength (essentially the balsa will fail/break before the hinge does.). So I am starting to move toward just using the edges, rather than a complete contiguous hinge.
I need a gap for the brake stop anyway.
The needle pokes 5 holes, I will use these to sew in the hinge. I find it easier to prepoke the holes.
Nice trick is the almond can with the plastic lid. I put the balsa on the lid and I can poke the needle through the balsa and follow through into the lid and can. Makes it easy to push needle almost all the way through with pliers, without poking myself.
Next round except for the brake stops, this will be all balsa. I had an epiphany of how to “jigsaw puzzle” the pieces for an easier build and more secure and easy rigging for flight.
The brake stops still need either 1/32 basswood or plywood, with a built “ply” with 1/16 balsa (or could used the basswood or plywood, just need a change of grain orientation for basswood). I am finding both cutting and hole poking much tougher with plywood or basswood. A drill is a bit of a hassle for these small parts. Maybe if I had a drill press, but I am an indoor spare bedroom builder. SWMBO grants me more than enough leash anyway!
