What is the fuel mileage of a twin engine prop plane non turbo?

Question

What is the fuel mileage of a twin engine prop plane non turbo?

Answer 1

That's sort of like asking "what's the fuel mileage of a car?"  It varies a great deal between, say, a Twin Comanche and a Convair 440.  At one time I occasionally flew a PA-30 (Twin Comanche).  It's a fairly economical twin, and I could cruise about 150 kts on around 14 GPH total, so:  150 kts X 1.15 = 172.5 statute mph.  172.5 mph divided by 14 gph  = approximately 12.3 statute mpg.  Generally speaking, it will go downhill from there as the aircraft get larger.  Of course you could consider seat miles per gallon, then the comparisons wouldn't look so bad.

Answer 2

Im assuming you mean a piston engine by non-turbo, not a jet engine, as they both aren't turbo-props. It varies drastically depending on weight (how much cargo, fuel, and passengers are on board), altitude (the density of the air) and the aerodynamics of the aircraft. The quesiton is vague but probly between a 4-15 miles per gallon.

Answer 3

after a lot of looking about 4mpg for a 5 seater  flying 200mph

with gear for 5 (cessna 310)

Answer 4

Since the smallest ones with O-360'S use about 11gph per engine and the largest one like the Beechcraft Queen Air with its 400hp O-720 use about 25gph per engine, there is no real specific answer.

In general it is very poor, about 4-8mpg, but they can haul 6-10 people.

Answer 5

It depends on the aircraft, engine, state of maintaince, even how clean it is. Clean polished aircraft fly further on same fuel amount and slightly faster than dirty. Plus what load is being carried obviously a light load is better on fuel than a heavy. and I hate to say this no two machines are exactly alike. No matter what they look like from outside. Any pilot will tell you some individual aircraft will fly better than another identical aircraft. Why is a mystery. It has to be from a combination of minor factors. Probably going all the way back to when built....Even what the weather is. A tailwind is better than a headwind. Hot humid days require more power for take off than others. This increases fuel use....There are to many factors too standardize it.