This is a OSH picture of the Power Sport gear box prop shaft
and internal gear. Power Sport sold at least three firewall forward
$17K Mazda engines before OSH. Two went to akro guys. Looking at this

cannon

proof prop shaft I can see why. Beats the Lycoming akro engine hands
down. The downside is the box is quite heavy at around 60 pounds.

The PS RV6 215 HP peripheral port rotary had at least 41 hours as of OSH
and was going 195 MPH with the wrong prop at the rev limit of 6250.
They have an MT variable pitch prop soon to be installed. Still has
minor cooling problems. I will fly up to see them in about a month and
give you guys a report on how it is doing.

Ray Richardson owner of Power Sport told me they plan to run the Apple

Valley

to Copper State race and win the $500 Everett Hatch Memorial Prize in
October. The aircraft rotary engine cause is moving right along.


Paul Lamar

Howard wrote:

Paul:
    That is impressive.... what sort of bearing setup do they use?
Presumably from the location of the shaft (above center) they were using a
spur gear reduction...... also I assume there was some sort of damper inside
the end of it......  Is the hub removable?  If not they must be using a
slipper type bearing and two piece seal..... I'd love to examine it in
detail.....              H.W.

                                                     H.W.

All ball bearings. Internal spur gear reduction.
No dampers of any kind. Direct drive off the flywheel with pinion
gear ball bearing support internally. Power Sport rates the box at
300 HP. $6,500 for the box and flywheel.

Paul Lamar

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