The original unit rotates the turret 4 degrees for every turn of the handle, so that's 90 turns to rotate the turret through 360 degrees, which I find quite hard to believe. I would have thought that there was a fine and course setting but I can't find any evidence of this, however I have read that the gearbox could be disengaged from the turret ring so that the turret could be rotated manually by hand. The original turret ring gearing would have been quite a precise component but of course mine has been fabricated, so I am trying to compensate for this by allowing the gear that meshes with the turret ring gear to have a certain amount of horizontal float. To this end, the internal gears are housed in a frame that rotates around the small forward gear shaft bearings, at the opposite end of the frame will be a spring, that puts pressure onto the frame, thus forcing the final gear and the turret ring gear together, I hope.
It's early days but I think that it will work.
Jon
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1950 Land Rover series 1
1967 Land Rover series 2A LWB
1986 Land Rover series 3 SWB
1938 DKW SB200
1944 DKW NZ350-1
1967 Ural K750 sidecar outfit
1944 VW Kubelwagen KDF82
1942 Steyr 1500A
1944 Morris C8A
1943 Chevrolet CMP8A HUP?
194? Bedford QL
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