Tom
The most successful local LittleSquare is using the high performance
wing design shown as an alternate on the plan. I believe this is an 8%
camber. It seems to be about half a minute better than the plain vanilla
wing in a low ceiling.
I haven't had much experience with Super Sport since I have a lot of Tan
II. Last Friday I was helping a team flying a nicely built one of Dave's
models on .095 SS and the backwards Ikara prop that he supplies. They
topped out at about 1 1/2 minutes. A change to .095 2/98 TanII put them
at around 2:15. They are changing to the bigger prop and will be flying
on .100 7/02 next time.
The Chamblee team has 2 LittleSquares using the modified wing section
and the big prop. They are in the 3 1/2 minute range in 25 feet also
flying on .100 7/02.
I think the big prop requires heavy rubber for low ceilings. For a
higher ceiling maybe a little less would be okay. If you have to use SS
I'd probably go somewhere over .100. But 10% turns left is not bad so
maybe your model is flying on less power than these.
My best luck with the big Ikara has been with the TE of the blades cut
off flush with the spar and the pitch set around 14.
On Mon, 2008-03-17 at 03:10 +0000, soslipstream wrote:
> Bill Gowen-
>
> Thanks for publishing the LittleSquares plan. Two weeks ago my
> daughter Ruth patiently made notes on its features. She is using my
> Hi-Espect design and was using a wing camber that was almost dead-on
> with your design. She also has twin circular fins formed using a
> small glass olive jar. The airplane is ballasted up to 6 grams. She
> flies on .087 Tan SS rubber.
>
> Last week she built a new wing with 5% higher camber and had me time
> two flights at the high school. At a max of 21'(bottom of scoreboard
> box in the gym's center) both flights were over 3 minutes. She was
> only using 3/5's max torque on the motor winds. The cruise was over
> 50% of the flight time. The airplane came down with 10% winds left.
>
> We would both like to know this; she is using the fat Ikara prop
> with your suggested modifications. She wants to modify a second
> version and have some wash-out on the tips. How does she add this
> wash-out and much area should she modify?
>
> The IN state finals are under a 35' clean area with probably an
> orbit diameter of 50'+ available. She plans on flying a large orbit
> with a slow climb, long cruise and slow descent. Will the added wash-
> out help? Should she consider upping the cross section on the rubber
> motor?
>
> Thanks,
> Tom
>
>
>
>
>
>
>
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Received on Sun Mar 16 2008 - 20:24:43 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:45 CET