Re: Wright Stuff designs for the this year

From: soslipstream <parkreation_at_msn.com>
Date: Sat, 27 Sep 2008 20:35:22 -0000

It will be interesting to see if the better teams build three wings.

As for formula, factoring the motorstick/boom combination lengths
according to the wing chord should also be considered. As should
seperation of wing plane from stabilizer plane. Those wide chord
wings will be turbulent off the trailing edges. Various widths in
wing chord may effect center of pressure and/or CG with moment
changes. As we know, longer tail moments can help in stability. I
suspect that starting with motorsticks at 50 cm will be the initial
benchmark.Longer than 50 cm makes sense but wide chord wings and
long, stiff motorsticks may become mass challenging for some newbie
teams. Mandrel wrapped balsa tube motorsticks anyone?

Our first test mule will be ready in two weeks to take advantage of
the HS's fieldhouse.

Tom Sanders,
Team Vikes



--- In Indoor_Construction_at_yahoogroups.com, "Jeff" <janderson@...>
wrote:
>
> OK, this years rules are out, slightly different twist to encourage
> design variation this year.
>
> While the wing span is limited to 40 cm max, the wing chord is
> unlimited. Except you get a bonus at state contests for 6.5 cm max
> chord and at nationals for 5.5 cm max chord.
>
> Stab limited to 20 by 6 cm, 20 cm prop, 7 gm max, 1.5 gm rubber.
>
> OK, so my question. How should one adjust the distance between
wing
> and stab as the chord changes?
>
> I'm fairly sure equations are somewhere on the web to estimate
this,
> and variations have been discussed in this list. Pointers to
those or
> appropriate key words to search also appreciated.
>
> Thanks,
>
> Jeff Anderson
> Livonia, MI
>
Received on Sat Sep 27 2008 - 13:35:23 CEST