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Slingsby T13 Petrel Build

Posted: 26 Apr 2016, 20:34
by Stuart Ward
When I first found this forum several years ago I made a list of gliders and tow planes that I would like to build.
First on the list was the Petrel, but my building skill were not up to that level. So I built a tow plane and the 1:3.5 Dart, and now it"s time for the next challenge.
I look forward to your comments, banter and support on the build log
Stu

Re: Slingsby T13 Petrel Build

Posted: 27 Apr 2016, 17:26
by B Sharp
Well done Stu. Have you got your timber problems sorted? Just take your time and enjoy the build - you have a long NZ winter to get it built ready for next season - no pressure then!
Brian.

Re: Slingsby T13 Petrel Build

Posted: 27 Apr 2016, 20:31
by Stuart Ward
B Sharp wrote:Well done Stu. Have you got your timber problems sorted? Just take your time and enjoy the build - you have a long NZ winter to get it built ready for next season - no pressure then!
Brian.

Hi Brian.
Just some background to the question:- Spruce in long lengths is very hard to come by here in NZ, and I have only found one place that has any in stock. They happen to be the builder of 100% size de Havilland Mosquitos. Needless to say, they protect their timber with a premium price. (1.5m x 6mm x 50mm = $50)
I have found an alternative supply of timbres for spars and trailing edges though. The options are Kahikatea, Yellow cedar(used on my Dart spars), Western Hemlock.
I'm leaning towards the Kahikatea as it is light , supple straight grained and glues well.
http://www.rosenfeldkidson.co.nz/specie ... x?r=3&s=43

Stu

Re: Slingsby T13 Petrel Build

Posted: 06 May 2016, 19:37
by Stuart Ward
I have managed to find a bit of time to spend in the shed. We are having a long mild Autumn with temps in the low 20deg most days.
This is a typical CW type build with hull built in two halves.
I'm finding that as the templates are originally hand drawn, printed on a home printer, stuck to the wood, then hand cut, there can be some variability in the sizes of the formers. But hand fitting is half the enjoyment of the project

Re: Slingsby T13 Petrel Build

Posted: 08 May 2016, 08:25
by Stuart Ward
I had a full day in the shed today. I took the half shell off the plans. Then glued the formers on the second side.
It was Mother's Day today and she came to supervise while I glued in the longrons.

Re: Slingsby T13 Petrel Build

Posted: 09 May 2016, 20:18
by Stuart Ward
I thought it was a good idea to hold the frame straight while I glue in the truss work in the tail, and the planking in the front.
This will also help to eliminate any twist.

Re: Slingsby T13 Petrel Build

Posted: 15 May 2016, 01:34
by Stuart Ward
I've got my spar material. It a length of Kahiatia. Nz White Pine. It's a nice piece of lumber, dead straight and no knots. The question now is which way do I cut the spars. You can see the grain on the end of the timber and I have marked the two options 'a' and 'b'.
Stu

Re: Slingsby T13 Petrel Build

Posted: 15 May 2016, 02:08
by Stuart Ward
That's the planking done

Re: Slingsby T13 Petrel Build

Posted: 15 May 2016, 03:17
by Tom Pack
Stuart Ward wrote:I've got my spar material. It a length of Kahiatia. Nz White Pine. It's a nice piece of lumber, dead straight and no knots. The question now is which way do I cut the spars. You can see the grain on the end of the timber and I have marked the two options 'a' and 'b'.
Stu
"B"

Re: Slingsby T13 Petrel Build

Posted: 31 May 2016, 08:28
by Stuart Ward
Thanks for you replies. I have now cut and planed the spar blanks to section "B"
Here are a few photos of the process.
As I don't have any large machines at home so it's pretty much all manual labour.