Joe, what aeroplane are you using the engine on? Although you
correctly say that the Jab runs at lower rpm, with no gearbox the prop
rpm is high. You need to make sure you can turn a relatively small
prop at 3300rpm to extract all the hp out of the Jab. This doesn't
work on slow draggy aircraft with large frontal area.

Dave




"Michael Coates" wrote in message
...
Answer = Buy the Rotax.......

Joe wrote:
Looking to buy either a Jabiru or Rotax 4 stroke engine.

RELIABILITY is the most important factor.

Seems like the Jabiru should be better with lower RPM but
believe that
Rotax
have more engines in service and therefore more development
time and
hence
reliability.

Any comments welcomed.

Phil