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Re: GREENLEY TUG BUILD THREAD 88"

Posted: 21 Feb 2019, 08:31
by john greenfield
Wayne
The tip is just a sheet of 1/4" (6mm) balsa sheet stuck onto the last rib and angled up at 45 deg. we do this by cutting the front and rear spars to the correct angle and just sticking the balsa sheet to the ends of the spars. Then, using the ribs as a guide, sand the balsa to the correct shape top and bottom before adding the ply sheeting to the wings. Ply sheeting is also added between the front and rear sheeting from the last rib out to the balsa tip.

Hope that helps.

AEB

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 27 Feb 2019, 20:09
by Barry_Cole
This is the way I did mine.

I left the spars long, and cut the ends out of 1/8" balsa as per the drawing. The spar slots are not deep enough, but I just deepened them until it fitted at the correct angle I made then 45 Deg from the top surface. When they were glued in, I got a piece of about 2" wide timber 24" long, and stuck coarse sand paper on the last 6 ". The wood then rubbed on the main ribs, and the end got sanded to the correct size and angle. After sheeting I stuck 1/32" ply on the end, to stop damage in the event of a 3 point landing.

It's a nice place for stickers too.

:shock: :shock: :shock: :shock:

BC

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 28 Feb 2019, 20:38
by Stuart Ward
That's the story, Wayne. Rough cut oversize and sand it with a long bar. Then ply the tip bays.
Stu

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 01 Mar 2019, 09:22
by john greenfield
Wayne
I notice that you did not cut a 45 deg angle on the bottom spars, they seem to be cut flush with the end rib. A 45 deg angle on the bottom spars would give more support to the tip but you can cut some 45 deg triangles from 3/8 balsa and stick them to the ends of the bottom spars to do the same job.

AEB

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 04 Mar 2019, 20:37
by Barry_Cole
Ouch, and Yuk....

:cry: :cry: :cry: :cry:

BC

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 05 Mar 2019, 07:42
by Stuart Ward
Ohhhh( cringe) in the words of my grand daughter "hurt ' morning"
Stu

Re: GREENLEY TUG BUILD THREAD 88"

Posted: 29 Mar 2019, 08:12
by Stuart Ward
Wayne Thompson wrote:
28 Mar 2019, 19:20
Stu is making a tow release for me then i can sheet the middle section etc
I had better get on and do that then

Stu