Who's building what for 2024??

[Jolly Roger]

Congratulations Chris! More speedy building. Slingsbys would still be in business if they’d employed you .
King Kite next?

[Cliff Evans]

The T21 was maidened at CMFC yesterday... She flies so nicely I'm now regretting not doing a plan!

Would that be the T31?

[Cliff Evans]

The T21 was maidened at CMFC yesterday... She flies so nicely I'm now regretting not doing a plan!

Do the plan, Do the plan, Do the plan, Do the plan

[Barry_Cole]

Yes, Do the plan. I might have a go at one of them....



BC

[chris williams]

I'll refer you to a previous post...

'I'm not doing a plan for this one because, frankly, I thought there wouldn't be much interest. I can't now anyway, because of all the mistakes I've made
haven't been corrected on the drawing, and now I can't remember what they were!'

[Barry_Cole]

Yes, but that was then, and this is now.

It will give you something to do, while you are deciding what to build next.



BC

[Cliff Evans]

I'll refer you to a previous post...

'I'm not doing a plan for this one because, frankly, I thought there wouldn't be much interest. I can't now anyway, because of all the mistakes I've made
haven't been corrected on the drawing, and now I can't remember what they were!'

DOH!

[chris williams]

The T31 & Pirat finally made it to White Sheet yesterday. The T31 is a surprising amount of fun to fly, with no vices and excellent, floaty landing characteristics. I put this down to the avoidance of such draggy scale details as sub-struts, tailplane struts and rigging wires. Having said that, in a wind exceeding 15mph, she shares many similarities with that of a helicopter!

[chris williams]

Foka 5, ready for covering: same 4.5 scale as the Foka 4...

[Antonia]

Chris, firstly wow.... the Foka 5 was the first glider I flew after progressing from club single seaters.

Now being a scale nerd, the full size has fully ply sheeted wings and tailplane, with only the ailerons and rudder being fabric covered, and the tailplane was a mass balanced all moving tailplane with a anti-servo balance trim system. the wings were interesting by the fact the upper and lower wing skins were made in concrete moulds, and were sparless, the forward part was 3 laminates of 1mm ply to mid chord what would be the spar if there was one, going to 2 laminates to what would be the drag spar area, then 1mm to the tailing edge. The wing was a multi longeron affair with ribs at lesser spacing you would expect in a wooden wing of the contemporary period. The wings were brought together like a composite wing with a GRP skin laminated over the leading edge, quite similar to the Standard Austria and SHK. With it being the height of the cold war Poland wasn't allowed to use strategic materials to make full GRP sport aircraft, so they pushed the use of wood to it's fullest extent.

Another interesting fact, is the Foka 5 won the OSTIV best sailplane design at the Leszno World Championships in 1968, and at the same meeting they then voted to change the standard class rules to allow retractable undercarriage, and water ballast, so condemned the Foka 5 to a small build run, hence why the Cobra 15 and 17 came into being in the early 1970's from the same design team.

Scale nerd over and out