Page 8 of 17

Re: Schleicher ASH31 4m

Posted: 03 Jan 2022, 12:42
by MartinE
Final decision on the tail boom:

1 layer if 100gsm Kevlar at 45deg
4 lengths of 80gsm uni-carbon
Final layer of 50gsm glass, to lay down all the rogue Kevlar fibres

Re: Schleicher ASH31 4m

Posted: 04 Jan 2022, 13:20
by SedB
No idea, but guess that's well enough for belly landings!? :)
How easy/difficult was is to place the 100gr glass. All I uses so for was 50, and that I already found a bit of a pain in the corners..
Guess the fun job still has to come; sanding it all smooth? I'm curious what other treatments you'll for the fuselage covering (sanding, filling, priming).
Looks really nice so far!

Daniel

Re: Schleicher ASH31 4m

Posted: 04 Jan 2022, 16:16
by MartinE
Hi Daniel,

It feels pretty strong now. Now I need to remove some of the bumps and then fill and sand (as I did to the bottom).

The 100gsm glass is relatively easy to lay on a large fuselage like this. Spraying fuselage with a light coat of 3M 75, before laying, makes the resin application a lot easier, as the cloth does not move.

Re: Schleicher ASH31 4m

Posted: 06 Jan 2022, 22:03
by NSWanderer
MartinE wrote: 04 Jan 2022, 16:16 Spraying fuselage with a light coat of 3M 75, before laying, makes the resin application a lot easier, as the cloth does not move.
That's a great trick - thanks!

Re: Schleicher ASH31 4m

Posted: 08 Jan 2022, 13:50
by MartinE
In order to get the desired nose fit, I bought the GM spinner and 17x10 scale blades.

These are designed to fit the shape of the fuselage (and are already coloured white, obviously :D ).

Whilst not cheap (£60 for spinner & colet), they very well made, with the spinner in carbon fibre.

Re: Schleicher ASH31 4m

Posted: 09 Jan 2022, 16:05
by MartinE
To create the tail hinge, a carbon tube was glued into a slot in hard balsa, which was then glued to the fin, then shaped.

Re: Schleicher ASH31 4m

Posted: 09 Jan 2022, 16:07
by MartinE
2 fibre glass tabs were made (with a corresponding hole) then bonded into the tail.

Then the rod can be run down the tube, through the tabs to form the hinge.

Re: Schleicher ASH31 4m

Posted: 13 Jan 2022, 21:31
by NSWanderer
Very neat, Martin.

Re: Schleicher ASH31 4m

Posted: 14 Jan 2022, 09:15
by Barry_Cole
Please do not post on this Forum for the next 7 days (Approx).

The Forum is being moved to a new server, and your posts will be LOST forever

Thanks for your help.

BC

Re: Schleicher ASH31 4m

Posted: 26 Jan 2022, 17:28
by MartinE
Hope it's safe to post now.