I did another few test runs with it last weekend the engine peaked to 17.4k rpm in the hand no spring or valve float issues yet.
The OS Alpha .56 has an integrated oil feed up through the cam, rods tubes, into the rocker box and out the exhaust.
Big plus for cooling and wear protection.
Here is a test hit the water was rough into the wind pass with radar to confirm speed. The plug was loose I forgot
to tighten it after start up. Did a follow up with a dynamite gps speed logger and the plug was tight gained 2mph to
44mph. End of testing with the ABC S-20 nice prop with some cup in it good thrust but the nominal pitch is too low.
Then tested a Octura 2250 but by then the water was too rough to get on the throttle but very promising.
With some calmer water could hit 50 ish.
Published on Aug 5, 2017
O.S. Alpha .56 4 Stroke / 42 mph pass on radar
ABC S-20 / 1.6x55 rough water day had to take
it slow in the turns and on the back stretch.
Best pass with this prop not on vid is 44 mph same day.