Newbie with Churchill cub

[Highpower]

(01-09-2023, 01:10 PM)Lockwood1956 Wrote: Just found this pic of a mark 3 Cub gear train (only a side view I'm afraid).

But it certainly looks like there are 4 gear placements in use,

What pitch are you setting up for? Some require more gears in the train than others. In the side view picture you posted you see the path of the power flow through the gear train to the lead screw. (For whatever pitch it is currently set up for.) The two back to back gears are required to move the power in or out on the studs in order to be able to fit larger gears in where needed because you can't line them all up in a single plane. Sometimes extra gears are stacked together just to take up extra space on the studs. Other times they are keyed together to serve as a drive gear and driven gear. Does that make any sense? Clear as mud right?