Displacement: 0.545 cu in (8.93cc)
Review by: Russ Watson
|I have flown the plane several times with the stock " Power Box"
muffler and have been very satisfied with the power. I also went
from a 13 x 6 prop to a 12 x 6 prop and the unlimited vertical is
even better. The engine is nearly peaked out on the mixture now
that it is well on its way to being broke-in. It has become very
fuel efficient. I could get about 18 minutes of flight on a tank
with the .46 AX and I'm getting around 15 minutes at this time with
the .55 AX.
I originally installed this engine on the the Ultra Stick to break it in until I decided which plane would become its permanent home. Now that I've seen how it pulls the Stick around, I think I'll leave it forever.