I recently acquired the drawings for 'Gert' and I wonder if anyone can explain why there are two sets of drawings for the cylinders, slide valves & eccentrics?
It seems that the 'original' ? definition of the cylinders, valves & eccentrics are on sheet 3; but an additional sheet 9 is provided that has alternative dimensions for all.
I assume that this sheet 9 was created in order to correct errors or give a more satisfactory solution?
Any help much appreciated.
Dave