12/23/2003 06:12:59 PM,
Serialize complete at 12/23/2003 06:12:59 PM
Thanks for your note!!
I don't know that I would agree with the statement that we don't fly high
enough
for the rich mix to matter. At 8000' MSL ambient pressure is 73% roughly
of
sea level. That's 30% wasted gas and decreased HP output and sharply
decreased
range. And that's the altitude I have been told is the sweet spot for
cross country
in this aircraft.
Bleeding air into the airbox is neat idea. The Rotax at cruise nominally
uses
5500 rpm X 1.3 liters displacement / 2 for 4 cycle = 2383 (is this
right??) l/min
of air. Thats why super/turbo chargers have to move so much air to be
effective.
Aside from buying a 914, where can one generate so high an extra flow
rate, say
a compensating 30% boost in flow or 715 l/min or air. Also, the air
plenum system for the 912ULS
does not look very efficient. The rubber skirt after the NACA inlet has
leaks, and there are two
90 degree bends before the air box. That inlet system reduces any ram air
effect we might get.
Thats why I thought liquified, pressurized N2O might be an option. 'Course
a tank would only
last an hour or so for a small effect.
Tis a quandry, but then again, N224XS is registered as an experimental
aircraft ;-)
and thankfully I do not have to contend with the PFA
Happy Holidays All,
Ira
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