Re: Re: VP-mechanism: geometry symmetry and bearing friction

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Thu, 28 Jul 2011 14:33:53 +0300

Thanks to all for the tips on the F1D prop shaft. As I wrote before, I
have a scroll of 0.35mm wire from Blashewicz (ukraine), so I tried to
straighten that. I calculated that the pull force would be about 4 to 5
kilos, pulled it up to 10kg (20 pounds), but it remained curved. I then
tried the "rotate and pull through an inclined hole" -method, but this
only produced a wire with a nice corkscrew pattern... :-) Luckily I
found another short piece of 0.35mm wire, where I managed to salvage
enough straight parts for 2 hubs; this probably originates from my time
spent in Montreal.

I guess I need to go to guitar string shop next. I did that several
years ago when I started to build pennyplanes or F1M's. That was not a
good experience, but the strings that I bought were rather mellow steel,
easily bent, but also lost their shape too easily. Are there different
brands of guitar strings, and what to look for to get "springy" wire?



-Tapio-
Received on Thu Jul 28 2011 - 04:33:55 CEST