Heiner queried: >I would like to set up an eastward turning globe with the help of an >anticlockwise 24 hour quartz movement so that the model >planet would turn once within the solar day.
Perhaps a more direct way would be to have two drive motors. 1. The first would turn the globe at Standard Time rate. Perhaps such electrically driven globes are already available? 2. The second motor would have to be geared to give one rotation in 365 days to drive a 'kidney cam' similar to the cam in a Pilkington & Gibbs heliochronometer (accurate drawings available from me). If this 'Equation of Time Cam' controlled the rotation about the earth axis of the framework supporting the globe then the whole asssembly would swing slowly back or forward to compensate. "If to do were as easy as to know what t'were good to do, chapels had been churches" (Shakespeare?) Tony Moss -
