Hi, fellow rotary enthusiasts.  I have a Ross 2.85 redrive on a pusher

airplane. (SQ2000)  If I

understand it correctly, the ross 2.85 reverses the direction of

rotation, and the 2.17 does not?

If that is the case, it would seem that a 2.17 redrive would allow me to

use a standard pusher

propeller, as on a LongEZ, Cozy, Veliocity, etc, whereas with the 2.85 I

must use a non-standard

propeller?
    I guess the other side of the coin is that I may realize more power

at the higher RPMs that

the 2.85 will allow?   Thanks in advance for your replies.  Paul Conner,

Mobile, AL

The 2.17:1 rotates backwards for a tractor Lycon so should also be

backwards

for a pusher Lycon. the 2.85 rotates correctly for a tractor Lycon so

should also

be correct for a pusher LyCon prop.

I would stick to the 2.85 any event for the additional take off power.

Paul Lamar

Hi, Paul....I looked at a Lycoming powered Cessna. When viewed from the

cockpit, the prop turns clockwise, and on my friend's cozy, when viewed from
behind the aircraft, the prop rotates counterclockwise, of course.
       You mentioned in your recent post that the rotary turns
counterclockwise when facing the flywheel. Since my 2.85 to 1 Ross will
reverse that direction, the prop will then rotate clockwise. Opposite from a
Lycoming powered pusher.  Am I missing something?  Thanks again for your
reply.  Paul Conner

It is easy to check. Rotate the Ross input shaft clockwise looking 
at it from the big end and watch what happens.
 
Paul Lamar
 
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