I've been making slow if not steady progress on the axles for my third Kaelble. They are a lot of work but
in the end not THAT much. I've made the out flanges that mount the planetary( epicyclic) final drive
to the wheel pairs. I have one axle nearly complete as I write this. Adding the epicyclic gearing has been a challenge.
The gear layout is deceptively simple in appearance but in execution, planning not so much. You'd expect the planet gears to
simply be laid out at 90 degree intervals, given set gears of a given pitch, tooth count, pitch diameter and tooth angle.. You'd think that.
Yet it isn't that simple. I found that the math behind working out a epicyclic isn't trivial and tooth profile standards even come into the mix.
Let me say I had to fudge two aspects of my implementation. I purchased high quality gears from Madler as may be seen and these likely worked against
me in this instance... Suffice to say I have one axle down or nearly so and I'll be happy to see this part of the work in the rear view mirror...!

Jerry

Preparing to cut the keyway in the sun gear


Sun gear mounted


Planet gears mounted. Internal( ring) gear yet to be cut and mounted on the inside of wheel hub.