Lowest ever MPG reading

mjt said:
fit gas turbines to cars and then we'll see what has better fuel economy.
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Assuming you can get a decent CVT gearbox to deal with transient load and road speeds whilst maintaning a constant gas turbine speed i assume. The operating window of efficiency is pretty tight plus in a turboshaft arrangement its not quite as good as the heat your dumping out the exhaust isnt actually for thrust.
 
About 6mpg in my mx5 on the old engine and 20mpg in my mx5 with new engine.

thats for full tanks with mixed driving. the 20mpg recently was after a drift day i did half a tank in a few miles of wheel spinning but the rest of my journey was slow on m1 so it worked out to be not too bad.
 
Simon said:
per passenger...
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No, light aircraft like the Cessna 162 can manage 25mpg at 136mph.

mjt said:
you're comparing an internal combustion engine with a gas turbine?
fit gas turbines to cars and then we'll see what has better fuel economy.

the internal combustion engine is probably the least efficient engine ever :p
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No I'm comparing a normal combustion engine plane.
 
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Energize said:
No, light aircraft like the Cessna 162 can manage 25mpg at 136mph.
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The Cessna 182 is capable of cruising at that speed but fuel consumption is in the region of 60 litres per hour at that sort of cruise, even when leaned back at altitude.

60 litres per hour
136 miles in one hour
~13 gallons per hour
136/13 = 10.5 miles per gallon.


EDIT: Seems I was wrong, there is indeed a 162. I need to do some catching up! It wouldn't cruise at 120Kts though and if it did, it would use a hell of a lot more fuel than that. You also have to factor in the climb fuel, taxying, holding etc. It isn't going to average 25 miles to the gallon.
 
Well I wasn't entirely sure about the cruise speed, however going by it's endurance of 470nm 5.8hrs and fuel capacity of 24us gallons, that would give 27mpg.
 
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I suppose that's not far off but believe me, you wouldn't want to spend nearly 6 hours in a 162 with a weedy 100hp engine. A 182 is bad enough!

As much as I love flying I'd rather take the car on such a journey, more fun :D
 
Never worked it out, but on the rare occasion I take the R34 to work it costs about £55 to do the 120mile round trip... (thats just normal 'I don't want to get banned' driving)

I'd expect to use 1 tank in 4 laps of the Ring when we go in October... (tank costs roughly £70 depending on where you fill up... No idea on its capacity though)

650cc injectors etc!! :( :D
 
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