Hello Paul,

Finally got a junkyard 13b.  Will be making into a single rotor over the
winter.  Will probably use a belt drive similar to Raven if it can handle
the rpm.  Looking for 130hp @ 8,000 and 140lbs wet using alum end plates.
Have to contact Jeff for a special mounting plate with a boss to hold one of
the PSRU bearings.   The other end will mount off the front plate.

Do you have an opinion for PSRU bearings?  Pressure feed plain bearings, oil
feed rolling element bearings, prelubed rolling element bearings, or greased
wheel bearings like Raven uses?

Dan F

To keep the weight down the prop shaft should be about 1.5 inches
hollow. I would use a Kaydon Reli Slim ball bearings.
Ordinary ball bearings in that size are very heavy and over kill.

The ratio shown here is only about 2:1 I would go 3:1.

Paul Lamar