Nor have I, Mike, beyond that. It is the predecessor to the gyroplane earlier posted by Chris.
Now returning to the Type 33/1, I have two questions. They are:
1. is the gentleman in the photograph David Kay and, if so, why is he hanging on to the Pobjoy engine dressed in his pyjamas and dressing gown?
2. is the reason why it is suspended vertically on the wall of the Edinburgh museum that the curator thinks that the vertical lift comes from the Pobjoy engine and propellor and that the rotor blades provide the forward momentum?
Pro tem, it's over to lefty.