With the circular tips(if the extend to for a sub rudder) you should see
increased stability during high torque launches. Provided that the cosine of
the angle of elevation of your tips, multiplied by the area of the tips is
greater than 6 percent of your wing area. The two inch circles should work
fine. I have heard some theory, that the circular tips have more
induced drag than square tips, but I still like them for models that are
prone to torque problems.
Nick Ray
On 11/15/06, Bill Gowen <b.gowen_at_earthlink.net> wrote:
>
> I really don't think it matters. If you use the upturned tips you can
> build and cover the stab flat and then raise the tips. The other way you're
> building and covering 3 different pieces. I guess it's just a matter of what
> you prefer. There may be an aerodynamic advantage for one or the other but
> that's well beyond my knowledge.
>
> ----- Original Message -----
> From: wombat_eagle
> To: Indoor_Construction_at_yahoogroups.com<Indoor_Construction%40yahoogroups.com>
> Sent: Wednesday, November 15, 2006 4:38 PM
> Subject: [Indoor_Construction] decalage
>
> That's what I've been trying to tell the "lunkheads", use a bit of
> clay to balance and set the glide. They like to "wind-em-up" and see
> what breaks. (;-')
>
> On my ddesign, it seems to like about the rear of the wing for cg,
> just haven't had a place to test.
>
> I must have had a senior moment, forgot about tail volume but as i
> have a smaller stab built will try it for kicks. Right now I'm
> limited in motor stick length to what will fit in the carry case.
>
> Bill, what's your opinion on using the "twin fin" which is a 2" dia
> round cnetered bit film covered on each stab tip rather that the
> "folded" semi upright tips like ion the little square?
>
> wombat
>
> [Non-text portions of this message have been removed]
>
>
>
[Non-text portions of this message have been removed]
Received on Wed Nov 15 2006 - 15:06:07 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET