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Schleicher ASH31 4m

Let us all watch your new project progress.
MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

Apologies Andrew, I used your last name.
MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

The tailfin spar, having been bonded with resin, is now very stiff, offering good strength.

The foam was removed and spar placed in.
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

Having finished the top sheeting, the support were sawn off and the formers rubbed down.

Bottom sheeting can now be glued on.
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Andrew Ray
Posts: 94
Joined: 19 Mar 2015, 19:15
Location: Staffordshire

Re: Schleicher ASH31 4m

Post by Andrew Ray »

No worries Martin. I'll be keeping an eye on this thread now I've found it.
MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

More progress on the bottom sheeting - this was more tricky than the top, due to the compound curves.

I've also put together a fuselage stand (from the many ply offcuts I have in the workshop), with some foam edging.
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

After an overnight cure, the tailfin has both sides and the spar bonded on. It weighs 116g and is very strong vertically & tortionally.

The leading edge was filled with a stiff expoxy/micro balloons mix and will be shaped to the correct profile.

Tail plane mounting screw at the top.
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

Skin finished (bar sanding down) and the fuselage comes in at approx. 700g

Couldn't resist propping the tail on!
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

As the front of the fuselage will potentially quite weak, I've lined the inner sheeting with 3mm, high compression, foam. (That will then be glassed on the inside.
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

Where the wings will connect to the fuselage, it's important that the location pins are in line.

I created a jig from an oak offcut - drilled & reamed two 5mm holes, to give a snug fit to 2 carbon fibre rods. Then the brass tubes can bonded to the wing profiles perfectly aligned.
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MartinE
Posts: 54
Joined: 28 Oct 2021, 14:36
Location: Essex

Re: Schleicher ASH31 4m

Post by MartinE »

Having bonded the foam onto the inside of the balsa skin, a layer 100gsm glass (on the bias) was applied.
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