I might try for a script. It would be for "illustrative purposes," or safe hobby use only, not for building helicopters. :-)
It seems like gear making is an art. They do heat treatment, tooth contact analysis and more grinding...
I'm still trying to draw up the gear blank. The face tangents appear to join at a different point than the "gear heel pitch diameters."
The blank should be the same as for regular bevel gears...
The crown gear is said to have advantages over the spiral bevel gear, strength and easier alignment.
The globoid worm gear looks interesting also. The pinion is said to be easily drawn in CAD. The gear is said to be very complex, but
maybe a bunch of sequential Booleans with the pinion would work for amateur use?
- Brian
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