Re: what is difficult in building indoor duration

From: Mark F1diddler <f1diddler_at_yahoo.com>
Date: Mon, 15 Oct 2012 18:28:47 -0000

--- In Indoor_Construction_at_yahoogroups.com, "Yuan Kang Lee" <ykleetx@...> wrote:
>
> Mark,
>
> Tell us about your EZB and flights.
>
> -Kang

Ok! Wanted to test a hypothesis that smaller dimensions in every part (example, 17" wing, 11.5" prop, etc.) might be a decent way to get good times in our scubbable (27 ft.) ceiling, due to reduction of flex problems. (Example, sometimes I used to get wing tuck after brushing ceiling for a minute, end of flight, spiral down.) So, test model was .34g with 7.8" motorstick, 17" wing, 17.2" overall length. Everything seemed to work okay except too small a prop. The RPMs were very high (which I expected) but could not unwind even most of turns before landing. Of course, much fatter rubber defeated the intention of higher turns count on small prop. Finally tried an old clunker prop, (.127g, 13.5"D) to get 19:15 flight needing 15-20 steers (worse than usual drift for this site.) But this didn't beat the times I used to get here with .55 g conventional LC type ezb. Anyhow, I was surprised that a .097g wing could handle the big prop using .034" rubber, but it did. Maybe the 17" wing is a good idea, and probably the only good idea. Ground handling is still the worst part for me, example, the wing now weighs about .110g, as it's hard not to overdo repairs.
MB
Received on Mon Oct 15 2012 - 11:28:49 CEST