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F86 "Gamma" Build

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Martin Gay25/07/2019 09:40:30
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160 forum posts
53 photos

Welcome to the first build blog for the PSSA Mass Build 2020.

This model is being built to confirm that the production cut files are correct after incorporating the adjustments from the independent Beta build.

One thing that I did notice when flying the prototype model during the Lleyn event is that my old eyes struggled at times to see the Sabre in its aluminium colour scheme against the grey sky/sea. For this reason the colour scheme above is going to be used on this aircraft.

Before any "scale police" make comments about it - yes I know that the full size aircraft depicted uses a 6-3 wing which is slightly different to that shown on the plan. However, I am comfortable with that! smiley

Martin Gay25/07/2019 09:46:50
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160 forum posts
53 photos

The parts are all cut out and confirmed to be correct! yes

sabre ply parts.jpg

Martin Gay25/07/2019 09:50:52
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160 forum posts
53 photos

Wing Jig assembled. This allows the correct dihedral and washout to be easily built in. The prototype wing was built in one piece, whilst the second, and this third, wing have been built as two separate entities which will be joined together later in the build. Two smaller wing panels certainly makes construction a bit easier at this stage.sabre wing jig.jpeg

Flyer25/07/2019 10:12:17
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535 forum posts
81 photos

Watching with interest! laugh

Alan Gorham_25/07/2019 10:26:28
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961 forum posts
102 photos

Well that's the colour scheme I was going to use for mine well and truly stolen!

Martin, I've got 3 PSS models pained green/grey camo upper surfaces and I have to say they are hard to see in cloudy conditions. Even allowing for your jaunty yellow bands I wouldn't say that is a high vis scheme...

Anyway, crack on and show all us mass-builders how it goes together!

Martin Gay25/07/2019 10:52:02
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160 forum posts
53 photos

Al,

that is the advantage of doing the first build - you get first choice of the colours!

I may have to think about using dayglow yellow for the X's. frown

Alan Gorham_25/07/2019 11:05:33
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961 forum posts
102 photos

Fair enough, can't argue with that logic.

It will be fine on a day with sun and blue sky anyway. I'm still planning to use a camo scheme on mine.

Martin Gay26/07/2019 09:56:18
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160 forum posts
53 photos

First up - the parts to build the wing jig!

img_2915.jpg

Martin Gay26/07/2019 09:58:20
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160 forum posts
53 photos

These parts get assembled to form the building board. I added some triangular stock to the joints to make certain that the jig was square and solid!

img_2919.jpg

Martin Gay26/07/2019 10:00:50
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160 forum posts
53 photos

After the glue had dried I made sure that everything lined up with the plan. (Note: the keen eyed amongst you all may see that plan used is an earlier version and does contain a few differences to the one that you will be using).

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Martin Gay26/07/2019 10:04:22
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160 forum posts
53 photos

The wing skins were made up from medium to medium hard (my personal preference as I usually end up poking my fingers through a softer skin!). At the moment the left and right wing skins have not been joined at the centre line - this will happen later in the build.

img_2922.jpg

Martin Gay26/07/2019 10:08:22
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160 forum posts
53 photos

The position of all the ribs, spars, false leading and trailing edges are marked onto the inside of the skins and the lower spars added. On this model I have used hard 3/16" x 1/4" balsa - it has proved to be more than strong enough on the prototype model which was skinned with lightweight fibreglass. If you are going to film cover the model then I would consider using some straight grained spruce for the spars.

img_2924.jpg

Martin Gay26/07/2019 14:59:13
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160 forum posts
53 photos

The wing ribs are cut slightly over length to allow for chamfering them to match the wing sweep at both the false LE and false TE strips. The spar slots also need to be angled to match the sweep.

I seemed to be spending more time sanding the ribs to match the sweep angle than I did in actually gluing the parts together. However, it does allow for good, strong glue joints.

Photo shows a trial fit of the ribs onto the lower wing skin and spar.

img_2925.jpg

Martin Gay26/07/2019 15:02:45
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160 forum posts
53 photos

Top spar and shear webs added, after more slot sanding. since I used medium hard 1/16" balsa for the wing skins I was able to use the offcuts from that part of the build to make the shear webs. yet again more sanding was required to angle the ends of the webs to fit the sweep angle.

Photo shows it all glued up with the false LE and TE fitted as well.

img_2932.jpg

Martin Gay26/07/2019 15:04:50
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160 forum posts
53 photos

Next up was the addition of balsa blocks into the area that the flap and aileron hinges would be fitted to reinforce those areas.

img_2933.jpg

Monz26/07/2019 21:37:59
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545 forum posts
26 photos

Really excited for this one, can't we start the MB a bit sooner? Pleeeeaaasssee!!

Tim Mackey27/07/2019 06:39:59
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20919 forum posts
304 photos
15 articles

Nice work so far Martin 👍🏻

PS: Anyone thinking of this one, I assure you she flew a treat when I had five minutes on the sticks at the Lleyn.

Phil Cooke27/07/2019 09:55:58
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2255 forum posts
1540 photos

A reminder that Sabre plans and short kits can be ordered from August 1st - by emailing me at webmaster@pssaonline.co.uk and registering your participation and requirements - I'll then forward all orders to G&M models who will request more details from you directly for the invoice.

Mark Kettle 127/07/2019 13:32:37
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2367 forum posts
1382 photos

Looking forward to this Martin.

Peter Garsden29/07/2019 08:17:43
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1573 forum posts
1159 photos

Sounds interesting again. I am in for the build plan Phil and kit of parts. Incidentally chaps I should be starting a Jet Provost 1.5metre blog soon - not to distract of course as if I am not finished, I will start this one and side line the JP.

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