Quote:
Originally Posted by Jared341
Maybe I'm missing something coming from my EE/CS background, but I don't really see why a coax crab would be appreciably more inefficient than a non-coax. Well meshed bevel gears have very similar published efficiency numbers to spur gears (~95-98%). And shafts rotating within each other shouldn't be an issue if ball bearings are used. Does anyone have any actual experience to the contrary?
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Coaxial crab typically uses chain to connect the drive shafts on multiple modules to the gearboxes. Especially when used with tensioners that provide friction on the chain run, the chain is less efficient than spur gears.