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Teakle ASW 20 3.5/1

Let us all watch your new project progress.
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Peter Balcombe
Posts: 1064
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Teakle ASW 20 3.5/1

Post by Peter Balcombe »

Martin,
Process probably sounds worse than it is in practice.
Have a look at the Bucks Composites web site as this contains a few "How to" guides including wing finishing. The guide covers both the "credit card" & "roller" techniques.
As you are close to me then I could always show you if reqd. (PM me if you like).
Peter

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B Sharp
Posts: 716
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Teakle ASW 20 3.5/1

Post by B Sharp »

Martin, it is not as difficult as it sounds. Think of it this way - you are gluing cloth to a wing with epoxy - simplesss.
Peter is spot-on with his sugestions so I have little to add there. I will advise you to cut a bit extra cloth all round the wing to give a good overlap. Spread the cloth on the wing and start by dribbling epoxy out the centre of the wing from root to tip. Then work outwards going from the centre to the LE and to the TE alternately. This will keep the glass from rucking up. Dont be frightened to put a fair amount of epoxy on to get a good wetting out of the cloth. Once it is all covered, wet and glossy, you can go over it with a credit card scraping off the excess, working chordwise from the centre line of the wing. Dont forget to wet well over the LE and TE.
Most important wear rubber gloved as epoxy gan get to you after a while.
Brian. :)

Martin Church
Posts: 74
Joined: 06 Oct 2015, 11:23
Location: Somerset edge of Mendips

Re: Teakle ASW 20 3.5/1

Post by Martin Church »

Ok I'm sold on it, those gorse bushes have teeth I guess. I will have a look on bucks composites website. How much cloth & resin for a 5 metre wing? Cloth's a metre wide as far as I know.

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Teakle ASW 20 3.5/1

Post by Peter Balcombe »

Martin,
I use the 25g cloth for skinning all my wings, including the ASW20. You only need a couple of inches overlap all round, so a 2m cloth pack may well be enough, although you would probably need a join (at tip end). A 3m pack would certainly be enough to use a single length for each wing panel.
I am pretty sure that I initially got one of the standard kit packs for my first attempts with the Bucks Composites materials & that was more than enough to do a complete wing/tailplane set on a 1/4 scale model, so will also do the '20.
You don't actually use as much resin as you might think.

Jolly Roger
Posts: 395
Joined: 30 May 2015, 20:35
Location: Sutton Bank, North Yorkshire

Re: Teakle ASW 20 3.5/1

Post by Jolly Roger »

Some great advice here on g/f wing skinning. If I could just add an important elf n' safety point...

Always use vinyl gloves with epoxy/polyester resins. Although latex gloves keep the sticky mess off your skin, they let the nasty chemicals straight through. So you feel safe from the carcinogens, but they've leaked right into you.

Easy Composites stock boxes of vinyl gloves for this reason.

Rog

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B Sharp
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Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Teakle ASW 20 3.5/1

Post by B Sharp »

Thanks Rog, good advice there! I didnt realise that rubber gloves let through the nasties - lesson learned.
Brian. :)

Martin Church
Posts: 74
Joined: 06 Oct 2015, 11:23
Location: Somerset edge of Mendips

Re: Teakle ASW 20 3.5/1

Post by Martin Church »

Lots done recently the T tail is on & I've started on the wing joiner slots in the fuzz. By a massive stroke of luck one wing with the fuzz is a nice fit across my modelling room & as I have a horse shoe type set of building boards around three sides of the room it was a doddle jigging up the wing & fuselage so I could mark the blade slot on the root. One issue this epoxy fuzz doesn't have the usual ply infill inside on the wing root? Do I need to cut one & epoxy it in? It seems quite sturdy as it is. Another thing that I'm very tempted to do is fit it out with 6s electric power, I already have the motor & lipo packs so am considering a 6s setup with 500 kv motor & a 16x10 folding prop with a 42mm spinner.
It would mean not flying at the peak but it's a little large for up there & I could then fly it with a dolly undercart from my Power flying field in Frome as well as aero towing on weekends away :)
Martin

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Peter Balcombe
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Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Teakle ASW 20 3.5/1

Post by Peter Balcombe »

Martin,
I would certainly recommend adding a ply former if there is nothing substantial there already as the wing root areas will take all the flying loads and also probably ensure that your wing joiner dihedral angle remains constant!
Peter

Martin Church
Posts: 74
Joined: 06 Oct 2015, 11:23
Location: Somerset edge of Mendips

Re: Teakle ASW 20 3.5/1

Post by Martin Church »

We discussed this at the aerotow if you remember Pete.
When I drilled through for the slots it was only epoxy glass that came out.
No plywood shavings at all. I remember all the old grp fuzzes had plywood reinforcement in the cuffs. A lot more work needs doing then it seems.

Martin Church
Posts: 74
Joined: 06 Oct 2015, 11:23
Location: Somerset edge of Mendips

Re: Teakle ASW 20 3.5/1

Post by Martin Church »

That would be very handy cliff if you could.
Could you also do me a dash board while your at it please?
Let me know what I owe & I can transfer some money across for you.
Cheers Cliff
Martin

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