Didn't it project silhouettes of various aircraft to aid aircraft recognition? I.e. it was a long hall with a projector at one end and a screen at the other.
Yeah something like that. I've got a photo of glider pilots being taught this way at Stoke Orchard. The RAF Instructor is behind them with a black wooden model of an aeroplane on a stick and he's projecting the shadow at various angles onto the wall in front of them.
Possibilities from the Synthetic Training Devices book (ADM 1/18969)
R8 Recognition Trainer - Shadowgraph (CGS)
Standard model aircraft is placed between a sheet screen and a point source of illumination. The model can move to-and-fro between the screen and the lamp. A ring is marked on the screen and the position of the model calibrated in ranges according to the sizes of the shadow relative to the ring (STC Paper No.38 ).
R9 Recognition Trainer - Shadowgraph Recognition Box
Standard model aircraft is rotated by a gramophone motor inside a box, the front of which is covered by a semi-transparent screen. A light behind the rotating model casts a shadow on the screen. Model changed from day-to-day. Boxes installed at various points throughout the training centre, or in the Recognition / Intelligence Room.
A Standard Model Aircraft was 1/72 scale.
Graham
Plan A is always more effective when the problem you are working on understands that Plan B will involve the use of dynamite
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