Re: double trouble and stuff

From: brantfredrickson <brantfredrickson_at_yahoo.com>
Date: Mon, 20 Feb 2006 20:10:36 -0000

Bill and Chris,

Thanks for the response.

Brant

--- In Indoor_Construction_at_yahoogroups.com, "doctorgonzo788"
<doctorgonzo788_at_...> wrote:
>
> --- In Indoor_Construction_at_yahoogroups.com, "Bill Gowen" <wdgowen@>
> wrote:
> >
> > Chris is off in the land of D/L gliders right now so I'll try to
> answer this. He sanded the top shape of the spar on the edge of a
> sheet and then sliced it off the sheet at the width required. After
> building the wing frame he sanded off the bottom corner of the
spar to
> get the elliptical shape.
>
>
> What he said...
>
> I used a razor blade to do a lot of the shaping.
>
> Were I to do it again, I would probably do all the spar shaping
before
> the ribs are added. Shape the ribs to match the spar.
>
> It would be great to see some comparisons between a rectangular,
> triangular, and elliptical spar model (all else being equal).
>
> Brant, it's more elliptical than parallelogram. Hmmmmm... Cutting a
> parallelogram off of a sheet and sanding that into an ellipse,
that's
> doable.
>
> The Double Trouble plan and article are both on indoorduration.com,
> articles section.
>
> I've got less than 8 ounces of Supergee II and 3.5 of ECM Apogee
400
> over here! A full-composite dlg is a marvel to behold. I'm really
> (really, really) interested in adapting this technology to high
> ceiling indoor freeflight. The outdoor r/c guys are breaking the
> 100sec barrier in dead air pretty regularly these days. The Apogee
> will make a perfect workhorse for figuring out cg, moments and tail
> configurations for freeflight "popouts."
>
> The "D" in DLG is for dizzy, for those who don't know...
>
> Chris
>
Received on Mon Feb 20 2006 - 12:10:39 CET