Re: double trouble and stuff

From: doctorgonzo788 <doctorgonzo788_at_yahoo.com>
Date: Sat, 18 Feb 2006 04:33:32 -0000

--- 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 Fri Feb 17 2006 - 20:33:37 CET