Scale Soaring UK

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.

Not forgetting to wax the wing joiner, so nothing sticks to it

The lower carbon skin has now been bagged onto the elevator.
Rough shaping done, but the leading edge needs filling and shaping correctly.

Weighs in at 76g & is very stiff tortionally and along it's span.

Looking really good Martin, what micron thickness of mylar are you using for the tailplane? Thanks.
Antonia

MartinE wrote: ↑27 Mar 2022, 12:02 Weighs in at 76g & is very stiff tortionally and along it's span.

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.

Hello Antonia,

I used 250 micron Mylar (from Ideal Stencils, you can buy by the meter).

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.

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

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.