> Andy's comments about the Jabiru 3300 installation are very interesting
> and informative. John Lawton's comments about the quietness of the Jabiru
> installation are provocative, given the 3000RPM takeoff RPM. Andy, would
> you happen to have any ideas as to why this is so, and what Jabiru does
> to address the observer noise issue?
>
Here are a few data on the Jabiru 2200 direct from DynAero, the French
manufacturer and designer of the MCRs :
- They never had any problems with the Jabiru (except one which was covered
by warranty)
- It is lighter than the 912, which is it's main advantage
- It can't really use it's 80 hp due to the high prop RPM (3300 RPM as
compared to 2300 for the Rotax)
- For the same reasons the observer noise is higher because of the higher
tip mach number.
- It necessitates a real break in period of 50 h, with mineral oil,
adjustments every 5 hours, and much heating.
- They have 250 Rotax flying, and only two Jabiru so they don't have much
flight experience to date.
- They would recommend the Rotax for a private owner and the Jabiru for the
flying clubs, who have a Lycoming culture and would keep their familiar
landmarks with this "mini Lycoming".
Further, flying clubs use the Jabiru powered MCR circa 220 km/h, with a
fixed pitch propeller with medium pitch. This setup gives a performance very
similar to the familiar Robin DR 400.
- DynAero's intentions are to have few Jabiru powered aircraft for the time
being, but with high annual flight time (500 h per year) in order to rapidly
build experience with the engine.
- They have a great faith in this engine.
Regards,
Gilles Thesee
Grenoble, France
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