Chessieretriever Posted December 13, 2011 Report Posted December 13, 2011 We have a TLS converted to a Rocket 351 and see the following TAS numbers in the flight levels: 2370RPM - 27.8" - 14.6GPH LOP - 203kts TAS - 24000ft 2420RPM - 29.8" - 15.1GPH LOP - 210kts TAS - 24000ft 2440RPM - 32.0" - 16.5GPH LOP - 216kts TAS - 24000ft 2440RPM - 33.1" - 17.5GPH LOP - 223kts TAS - 24000ft If you run ROP you use about 20% more fuel for the same airspeed on our engine (watercooled TSIOL-550). We have flown a tiny bit faster at 25000ft but only ROP which has a large fuel penalty for a minute improvement in speed. Hope this helps. O N9154W N92AV
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