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Subject: M1 Abrams fuel consumption
mabie    10/17/2006 2:47:37 AM
A common complaint against the Abrams is that the gas turbine engine is a fuel hog compared to the diesels found on competing tanks. On the other hand, I also read somewhere that a gas turbine doesn't that much more fuel to go from idling to putting the tank in motion while for a diesel it is the opposite, meaning it needs a lot more fuel once you actually start driving the tank. Don't know how valid this is. If true, it would seem to me that the M1 would want to avoid being in idle as much as possible.. it does have an aux power unit so it can shut off the main engine and save gas. Anyone care to comment?
 
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EMDII       10/17/2006 5:06:48 AM

A common complaint against the Abrams is that the gas turbine engine is a fuel hog compared to the diesels found on competing tanks. On the other hand, I also read somewhere that a gas turbine doesn't that much more fuel to go from idling to putting the tank in motion while for a diesel it is the opposite, meaning it needs a lot more fuel once you actually start driving the tank. Don't know how valid this is. If true, it would seem to me that the M1 would want to avoid being in idle as much as possible.. it does have an aux power unit so it can shut off the main engine and save gas. Anyone care to comment?
In combat, crews run the turbine at Tactical Idle, about 60% power. This provides large amounts of torque, which idling gas turbines do not have. The current M1A1 fleet has or is getting APUs. The original design was mounted on the RH aft corner. The newer models live in the bustle rack, a waste of crwe storage space. New smaller designs are afoot. These APU are for the FCS and radio/electronics.

 
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