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PSS A-10 Thunderbolt II - build blog

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Mark Kettle 103/09/2017 15:28:17
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2091 forum posts
1281 photos

Nice work there Phil, and a good weight saving, nice to know it's not collecting dust in the corner of the workshop.

Phil Cooke05/09/2017 22:50:14
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2061 forum posts
1422 photos

A relaxing spot of glassing after work...

fins glassing 1.jpg

Aiming to take the fins, fin bases, rudders, tailplane and elevators through glass and to primer at this stage to break up the tasklist still to follow.

Chris Barlow06/09/2017 02:40:21
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1727 forum posts
1172 photos

Brings out the wood grain nicely. It's almost a shame to paint it. wink

Andy Meade06/09/2017 08:33:23
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2305 forum posts
596 photos

Very nice chief. I honestly have never sealed a surface before glassing - I'm going to try Matt's tip of sanding sealer instead of epoxy as it's cheaper and easier to clean up after blush

Phil Cooke22/10/2017 11:03:14
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2061 forum posts
1422 photos

The two fins, fin bases, rudders, tailplane and elevators are now all glassed, sanded back and ready for their first coat of deep fill primer.

fins glassing 2.jpg

fins glassing 4.jpg

In an attempt to minimise weight gain on these rearmost mounted parts, I've tried a slightly different glassing method which hopefully eliminates the need for the traditional 'flow' coat. Prior to adding any cloth, all the parts were very sparingly painted with resin - almost a dry brush method, just to seal the grain. This was then gently sanded smooth and cleaned down prior to the glass cloth being applied using a Jenny brush. This way, there is no absorption - and any excess resin is then 'squeezed out' using a credit card.

fins glassing 5.jpg

The resultant surface finish on an elevator as it dries... akin to SolarTex. I'm fairly confident the amount of filler primer required to give a surface finish good enough for paint will be less weighty than what would have been added with the resin flow coat.

fins glassing 6.jpg

Harry Twist22/10/2017 17:41:30
239 forum posts
147 photos

Nice work Phil - what weight of glass cloth are you applying? I like your "dry brushing" epoxy technique- should save some weight on the tail feathers.

I have a similar job coming up and may try (as discussed in recent previous threads) sanding sealer - thinly applied and rubbed back prior to glassing.

Phil Cooke22/10/2017 18:47:17
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2061 forum posts
1422 photos

its all 25g/m2 glass cloth Harry - from Fighter Aces.

Chris Barlow22/10/2017 22:59:44
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1727 forum posts
1172 photos

That's a lot of glass cloth and resin to cover all of the A-10! surprise I might try Fighter aces when I come to order mine in a few weeks.

In addition to squeegeeing with a credit card I also use blue tissue towels to blot the cloth to remove as much excess resin as possible. It's surprising how much is still sitting above the weave when you think you've finished!

Martin Gay22/10/2017 23:09:38
28 forum posts
8 photos
Have you tried here?

http://www.easycomposites.co.uk/#!/fabric-and-reinforcement/glass-fibre-reinforcement/woven-glass-fabric/ultra-light-25g-woven-glass-fabric.html
Chris Barlow22/10/2017 23:38:14
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1727 forum posts
1172 photos

That's quite a bit cheaper at about £5.50/sqM inc VAT Will definately be shopping around when the time comes! Thanks Martin. yes

David Gilder22/10/2017 23:45:42
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1839 forum posts
636 photos

Looking good Phil. Glad to see things moving along again with the Hog! yes

Chris, Buy 5 meters and get it for less than buying 4 meters!!! cheeky

Danny Fenton22/10/2017 23:57:03
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8489 forum posts
3443 photos

That looks awesome Phil

The cloth sold by Phil at Fighteraces is excellent, I have tried cloth from other sources, I will just say you get what you pay for....

One thing you could try to make glassing easier and even lighter Phil is by using "peel ply". A pure polyester cloth you apply on top of the wet cloth/resin. It eliminates/absorbs all the excess resin, and keeps the cloth and resin in contact with the balsa. When the resin is set the polyester is peeled off, it takes with it any waxey surface and eliminates the need for a flow coat. Leaves a texture akin to solartex that sands really easily. Give it a go on the next one

Cheers

Danny

Edited By Danny Fenton on 23/10/2017 00:03:48

Phil Cooke23/10/2017 22:26:51
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2061 forum posts
1422 photos

Thanks Danny, I have watched your Peel Ply demo videos on YT many times, I will certainly get some and trial it on the bigger panels, wings and fuselage etc... thumbs up

Danny Fenton24/10/2017 00:19:13
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8489 forum posts
3443 photos

Thanks Phil, it would be good to have a chat at Gaydon on Sunday, you can fill me in on your pre-resin approach maybe I should do likewise and give that a go yes

Cheers

Danny

Andy Meade24/10/2017 09:25:43
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2305 forum posts
596 photos

Looking good chief - not long now yes

Peter Garsden27/10/2017 18:23:53
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1295 forum posts
883 photos

I have yards and yards of peel ply, and do agree with Danny. Unless I make up a fibreglass replica of SWMBO (the lost foam method of course) I don't think I will use it all.

I have also used it to great effect. You can also use it as a hinge when laying up bagged wings

Andy Meade07/11/2017 09:17:45
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2305 forum posts
596 photos

Happy birthday to you, happy birthday to youuu...

5 years on, still plugging away at it - well done Phil yes

img-20171019-wa0008.jpg

Phil Cooke07/11/2017 23:35:05
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2061 forum posts
1422 photos

Publicly mocking me into action is a dirty, shameful business Andy - embarrassed hehe

Yes 5 years!! Of course the A-10 has had more down time than build time over that period, at least I'm safe in the knowledge my epoxy has set hard on some of the earlier assemblies!!

Its back on the bench again now as you know, I'll update on fuselage joining soon!! But as happened in 2014, then again in 2016 - the 2018 PSSA mass build subject is bound to take bench priority before this is complete and ready for the paint shop!! That said I DO hope to have the A-10 ready to fly in 2018 though - honestly!

Andy Meade08/11/2017 08:46:48
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2305 forum posts
596 photos

As much as I take the mickey, I really am looking forward to flying these beasts in formation...then again I'm also not looking forward to it, as I know the quality of your build and finish will be a lot better than mine!

Peter Garsden08/11/2017 17:55:27
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1295 forum posts
883 photos

Any news about the secret mass build project Phil. I am itching to get sanding and shaving. I haven't made a balsa model now since my Corby Starlet - **LINK** which was at least 4 models ago, and am looking forward to it. Obviously I can't disclose the secret but it is the name of a high wind which has crossed the Atlantic recently and devastated the Caribbean?

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