Slingsby T13 Petrel Build

Let us all watch your new project progress.
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Cliff Evans
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Location: Bristol
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Re: Slingsby T13 Petrel Build

Post by Cliff Evans » 15 May 2016, 09:19

I agree, "B"

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Stuart Ward
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Joined: 21 Mar 2015, 18:23
Location: Pukekohe NZ

Re: Slingsby T13 Petrel Build

Post by Stuart Ward » 31 May 2016, 08:28

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.
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Rough cut blanks
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I love useing the hand plane
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Finished blanks including the 1.5mm trailing edges

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Stuart Ward
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Joined: 21 Mar 2015, 18:23
Location: Pukekohe NZ

Re: Slingsby T13 Petrel Build

Post by Stuart Ward » 31 May 2016, 08:58

I know these photos are a little out of order with the previous ones, but here they are.
Placing the turtle deck on scares me. Having to get it all clamped down tight within 30 minutes and keeping the frame straight and square is quite challenging.
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1/2 a roll of tape later!
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I believe that screw are now acceptable!

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Stuart Ward
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Location: Pukekohe NZ

Re: Slingsby T13 Petrel Build

Post by Stuart Ward » 31 May 2016, 09:18

I like to be able to service all the electronics on the glider. I don't trust servos to last for ever. I have had one or two fail on the bench ,but not in the air as yet. So I like to be able to change them out if I want too.
With this in mind I needed construct the servo tray so that I could remove it. The tray slots under the two block at the rear on either side.
The front of the tray drops down and is screwed to the bulkhead.
servo_1.jpg
View from the rear showing the rudder servo.
servo_2.jpg
Front view showing the elevator servo.
Last edited by Stuart Ward on 31 May 2016, 20:19, edited 1 time in total.

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B Sharp
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Location: Perthshire

Re: Slingsby T13 Petrel Build

Post by B Sharp » 31 May 2016, 17:27

That's starting to take shape Stu, but the ply skinning is never an easy process. I totally agree with you about the servo trays by the way.
Brian. :)

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Stuart Ward
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Joined: 21 Mar 2015, 18:23
Location: Pukekohe NZ

Re: Slingsby T13 Petrel Build

Post by Stuart Ward » 01 Jun 2016, 21:32

Next to be worked on is the bellcranck for the AMT. I made it from a sheet of fiber glass circuit board. This stuff plays hell with the saw blades.
I made a jig to keep the tubes square and straight while the glue dries, and I will use this jig again to set the pitch for the tubes correctly into the AMT.
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2016-05-29 13.36.16.jpg
2016-05-29 13.36.09.jpg

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Stuart Ward
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Location: Pukekohe NZ

Re: Slingsby T13 Petrel Build

Post by Stuart Ward » 03 Jun 2016, 09:17

Did a dry fit of the tail plane bellcrank. All was going well until I offered up the commercial 48" cable. It turned out to be an inch too short. :o
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chris williams
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Location: Blandford Dorset

Re: Slingsby T13 Petrel Build

Post by chris williams » 03 Jun 2016, 09:32

Stuart, I would strongly advise to abandon the Bowden cable for the AMT. A pushrod of 6mm spruce laminated on two sides with 6mm sq balsa will be much more reliable. (Or carbon tube) The problem with the cable is that at full up-elevator the wire has no support and is liable to bend under high loads, such as in a loop etc... (Ask me how I know!)

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Barry_Cole
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Joined: 10 Mar 2015, 09:30
Location: Hampshire UK

Re: Slingsby T13 Petrel Build

Post by Barry_Cole » 03 Jun 2016, 13:30

Are there any daft things left for you to do???????????

You seem to have covered most of them..

:D :D :D :D

BC

iceman952

Re: Slingsby T13 Petrel Build

Post by iceman952 » 17 Jul 2016, 18:26

Hi Stuart,

I hope your build is going well. I thought I'd share some photos of where I'm at with mine so far...

Richard
Attachments
2016-07-17 11.20.56.jpg
2016-07-17 11.21.39.jpg

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