Acis Super Charge Option

From Tom smith

Dear Thorwald, The amount of fuel burned will be higher
for the ACIS engines due to a
couple of factors:
  

1. The compression ratio for the ACIS engine has been reduced from 9.4-1
to 8.7-1. At this compression ratio, the induction system manifold pressure
will be approximately two inches higher than an engine with a 9.4
compression ratio. In order to maintain the same fuel mixture for
combustion, additional fuel is injected.

    2. Throttle position is the other variable to fuel usage. The more the
throttle is open, the volume of air will increase and more fuel is needed.
With the supercharger being capable of boosting to 34 inches and aircraft is
being operated at its limits, more fuel will be consumed.

     ON average, fuel consumption for the flight school aircraft having the
supercharger installed can be 2-4 gallons higher than the normally aspirated
aircraft when operating in the worst environmental conditions. With our
current winter time conditions, there is approximately an 8 1/2 gallon burn
per hour for the supercharged model aircrat used in our flight school That's
only 1/2 gallon more than a normally aspirated engine.

Tom Smith/VP Customer Service
RotorWay International