I've just returned from my morning constitutional and I see that 24 hours has passed and I can declare that oncemorealoft is correct - the GA Hamilcar. Impressive ID skills.
It was the world's heaviest glider at 36,000 lb AUW.
Don't worry Slb, I've done the same thing myself. I'm sure you would have got it if I had posted the unclipped image:
The flap and spoiler quadrant would have been a giveaway! I am intrigued by the markings on the flap quadrant - lift, neutral and drag. Does anyone have a copy of the Pilot's Notes?
Also the Spoiler handle was a surprise. I have not seen any references to spoilers nor in any pictures, particularly in this cutaway:
oncemorealoft has declared Open House.