<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
         <<  Lancair Builders' Mail List  >>
         <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>

I would like to know how the Lancair IV & IVP folks "normally" fly
the TSIO-550 engines.

The reason I ask is because we (at GAMI and/or Tornado Alley Turbo)
are thinking about offering a modified TSIO-550 engine along with our PRISM
ignition system.

We are currently flying a modified turbo 550 which is routinely
making 265+ Hp in cruise at 60 to 100 LOP, smooth as a baby's bottom, and
burning about 18 and small change for fuel.  Hottest CHT at altitude is <
380F.

With PRISM ignition, and modified as we anticipate, this engine
could make 375Hp at takeoff and maintain peak combustion pressures at or
below those presently encountered  . . . and probably cruise at 275 to 300Hp
continuous, but maybe only 265Hp... we would just have to see.


So how do you fly your engines, now?


Takeoff: MP RPM FF Hottest CHT?
How Hot?  TIT ?


Climb: MP RPM FF Hottest CHT?   How
Hot?  TIT ?


Cruise @ 16-18K MP RPM FF Hottest CHT?
How Hot?  TIT ?


Cruise @ 25K MP RPM FF Hottest CHT?   How
Hot?  TIT ?



Your input would be appreciated.    George Braly

LML website:   http://members.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair
Please remember that purchases from the Builders' Bookstore
assist with the management of the LML.

Please send your photos and drawings to marvkaye@olsusa.com.