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Schleicher ASH31 4m
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
The key next step is getting everything aligned; boxes to wing joiner, end plates and location pins.
They were then all bonded together, whilst clamped to the fuselage.
They were then all bonded together, whilst clamped to the fuselage.
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
Not forgetting to wax the wing joiner, so nothing sticks to it
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
The lower carbon skin has now been bagged onto the elevator.
Rough shaping done, but the leading edge needs filling and shaping correctly.
Rough shaping done, but the leading edge needs filling and shaping correctly.
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
Weighs in at 76g & is very stiff tortionally and along it's span.
- Antonia
- Posts: 140
- Joined: 17 Mar 2015, 22:30
- Location: Oxfordshire
Re: Schleicher ASH31 4m
Looking really good Martin, what micron thickness of mylar are you using for the tailplane? Thanks.
Antonia
Antonia
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- Posts: 577
- Joined: 30 May 2015, 20:35
- Location: Sutton Bank, North Yorkshire
Re: Schleicher ASH31 4m
76g is a REALLY impressively light construction. I’ve just made a very similarly sized tailplane sanded from 12mm balsa, glassed with 100gsm and with a living hinge and a carbon leading edge. It feels super strong, stiff and has a rock hard finish… but it’s 125g! Maybe I should have used 50gsm glass.
Loving your work. Please keep posting.
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
Hello Antonia,
I used 250 micron Mylar (from Ideal Stencils, you can buy by the meter).
I used 250 micron Mylar (from Ideal Stencils, you can buy by the meter).
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
Rog,
I was also pleased with 76g, I was expecting closer to 100g.
The foam is about 1/2 the density of balsa, with very good compression strength.
The carbon fibre shear webs are also very light.
I was also pleased with 76g, I was expecting closer to 100g.
The foam is about 1/2 the density of balsa, with very good compression strength.
The carbon fibre shear webs are also very light.
- Antonia
- Posts: 140
- Joined: 17 Mar 2015, 22:30
- Location: Oxfordshire
Re: Schleicher ASH31 4m
Thanks for the info Martin, picking your brains now…
With the tailplane tips, does the mylar comply with compound radius from leading edge profile to tip profile, or do you cut cleats in the mylar to go round the double compound curves then refinish the imperfections after curing? Thanks
With the tailplane tips, does the mylar comply with compound radius from leading edge profile to tip profile, or do you cut cleats in the mylar to go round the double compound curves then refinish the imperfections after curing? Thanks
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- Posts: 126
- Joined: 28 Oct 2021, 14:36
- Location: Essex
Re: Schleicher ASH31 4m
Hi Antonia,
I've never managed to get the mylar tips to fully conform (to foam), so I do put 1cm cuts into the curved sections. And even then I will have to fill & shape the tips.
I've never managed to get the mylar tips to fully conform (to foam), so I do put 1cm cuts into the curved sections. And even then I will have to fill & shape the tips.