Jet turbine engines

Horsepower is horsepower.  Whether you get a thousand horsepower from a
shaft turbine or a piston engine is immaterial.  If you have horsepower,
you can gear to get whatever pump rpm you want.

In fact, largest single engine I know of (horsepowerwise) is a Diesel,
with over 100,000 horsepower. Not aware of any turboshaft that big.  Of
course, the engine weighs MANY tons :-)

-- 
Don Stauffer in Minnesota
[EMAIL PROTECTED]
webpage- http://www.usfamily.net/web/stauffer