Gallons Per Hour

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ChiMike
Senior Member

Posts: 473

Gallons Per Hour Sept 29, 2017 0:05:55 GMT via mobile

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Post by ChiMike on Sept 29, 2017 0:05:55 GMT

I did a round trip from Gary-Chicago (KGYY) to Smyrna, TN (KMQY) this past weekend. Total engine time around 6.6 hours with ground time and warm ups. Flight time was about 3.0 each way— 122-125 KTAS @ 5400 rpm, 8500, 9500, or 6500 ft depending on clouds. I have a 914 engine.

I averaged 5.8 gph total fuel consumption.

What kind of GPH are any of you getting at similar cruise?

Thanks!

mackattack
Senior Member

Posts: 507

Home Airport: Gloster Aerodrome

Gallons Per Hour Sept 29, 2017 16:30:38 GMT ChiMike likes this

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Post by mackattack on Sept 29, 2017 16:30:38 GMT

I run my Astore at close to 5500 rpm in cruise (or with my current prop pitch, close to WOT without the turbo) in cruise. That costs me a little more in fuel flow (6-6.25 gph) but then I am getting 126-130 knots TAS depending on altitude.

Before I made the adjustments to my prop, I was getting similar fuel flow to yours (5.8 or thereabouts) at 122-123 knots in cruise.

The 912iS is the real fuel miser - that engine is down in the 4 gph range if memory serves...