Haven't done much work on the gearbox yet, the best prop I have
run is a 6 blade Warp drive with a 3.17 Ross and with the 3.21 Dodge
I think it will work out perfect at just over 2000 prop rpm for
cruise, Warp drive said that the best rpm for that prop was around
1900.
  Yes it may be that low rpm may not be best for the conventional CS
props out there but I have not checked into it.
 Ken

I can't speak for a warp drive, however isn't the optimal RPM for propelars
something like
1800?? [That is.. if they are to be totally optimized the optimal RPM
is.. 1800, current "in production" prop's
might not be optimized for this speed, yet less efficent at
their recommended speeds of 2200 or whatever]
It comes to mind that all the fixed shaft turboprop's out there
[Garrett's] all run
right around this 1800RPM. I don't have any documentation to back
this up but.. warp drive's numbers
seem to lead that direction also..  May be a higher reduction and a
more paddle
shaped prop, or a longer prop, running at a lower RPM might be more
efficent??
I'm sure someone on here could add to this from alot more experiance
than I have..

food for thought

Jarrett Johnson




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