Actually one could limit the RPM at lower altitudes to eliminate an
additional gear reduction sacrificing some early mission climb rate.

Cheers,
Brian
--------------------

Brian Feeney
DreamSpace and The da Vinci Project
bfeeney@davinciproject.com
http://www.davinciproject.com

Turbo systems are not nearly as hard to design as most people will
make them out to be. Series turbos are just an extrapolation on a
basic turbo system. Figuring for sizing and plumbing isn't too hard
but you really, really need to have turbo and wastegate reliability
nailed down. If a wastegate fails closed at low altitude, it becomes
very easy to destroy an engine in a hurry (rotary or otherwise).

I'm very comfortable sizing turbos for specific needs and know a
little bit about designing the system as a whole if you want any
advice.

-Chris

Do you have any data on the HP generated by turbo charger turbines?


Paul Lamar