-pondering recent posts about PSRU types i wondered if there has
    ever been
    built a belt drive such that a small gear belt drives a larger gear
    and then
    from that secondary shaft a smaller gear again belt drives a larger
    gear
    located in-line with the very first one, thus keeping the prop in
    line with
    the driving shaft.  this would eliminate the offset prop problem on many
    aircraft.  the step-down gearing could take place in two steps,
    rather than
    one like the typical belt drive.  the last gear would have to spin
    on the
    first gear's shaft, but everything rotates the same direction, so the
    surface speed isn't increased as much as the overall reduction
    ratio.  the
    belts would absorb power pulses well.  no lubricant would be
    needed.(right?)
    i would think it would be straight forward to build.  perhaps the
    diameter
    of the belt gears would need to be too big in order to have enough
    teeth or
    area in constant contact?  i'm sure this idea isn't new (probably first
    tried in 1908 or something!)   kevin

    Try 2006 :)
    --
    Paul Lamar ...No rotor no motor.




That Eggenfellner belt drive did not work out. He abandoned it, and now
uses all the housings as pallet stands.

Ken Bauman

Why did it not work out?

Paul Lamar

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