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#1
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Well, maybe B2C2 sets constant power at 9.5 gph per engine?
For normally aspirated that's probably all you CAN get above 10k? Then, at that power setting, B2CS gets 197 mph at 17k 185 mph at 10k 170 mph at 5k My turbo Cessna's manual says similar 65%=11.3 gph 194 mph 15k 183 mph at 10k 173 mph at 5k But then if one uses the turbo... 75% = 12.6 gph (ROP) 216 mph at 20k 203 mph at 15k 194 mph at 10k 184 mph at 5k
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David Wartofsky Potomac Airfield 10300 Glen Way Fort Washington, MD 20744 
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#2
01-05-24, 08:18 PM
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Its a turbo, so no change in settings up to 24k ft. MP and fuel flows are constant with altitude. Plane gets faster at higher altitude due to constant power. I have a chart of LOP power that I pulled that number from. I can re-check it but power is directly a function of fuel flow when LOP. all fuel is burned. I always cruise LOP. At current fuel prices its pretty easy to justify the GAMIs. I burn probably 5-6gph less flying LOP. My aircraft came with a JPI 760 and I set fuel flow LOP based on TIT which I hold under 1600F. CHTs are cooler than ROP
Last edited by B2C2 : 02-02-24 at 11:51 AM.
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#3
01-06-24, 10:03 AM
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9.5 gph per engine about 60%
About 60% power?
I've got GAMI's I installed two years ago, when TCM was backordered for injectors for months, and I could buy a complete set of GAMIS shipped next day for about the same. It's probably time I made the next leap, a insight G4 I think. The EI CG series looks sexy, and is primary for everything, but about $20k installed. BUT, it also introduces lots of places for single point failures / grounding as well. We fly inline twins for redundancy which provides safety, as well as performance. The G4 is only cert as primary for CHT and EGT, which is nice. Everything else is advisory. So maybe nice to know, but.... There is the price of the basic 'box' around what, $5k? Then about $3k for the basic harness. To add things like vibration, HP calc, add another $3k t to the harness. Not sure the cost exceeds the benefit on those. and maybe about another $3k too install it all? Going to poke around the site a bit and see engine analyzer discussion
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David Wartofsky Potomac Airfield 10300 Glen Way Fort Washington, MD 20744
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#4
02-10-24, 09:37 AM
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I'd love to see the LOP chart for your RSTOL T337D
That will help inch me over the line to buy the engine monitor..
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David Wartofsky Potomac Airfield 10300 Glen Way Fort Washington, MD 20744
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#5
02-10-24, 07:53 PM
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the chart is embedded in my checklist doc that I use for the plane. I print these on heavy stock and fold them in the middle for my kneeboard. The formula that relates FF to %bhp LOP was from the Advanced Pilot Seminars course.
Last edited by B2C2 : 02-10-24 at 08:24 PM.
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