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Old 01-04-2009, 05:08 AM   #5 (permalink)
Frank Lee
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Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
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Yeah, I have my Commercial Multi-Engine License and appreciate controlling props.

It appears props in general have a max efficiency of about 85%, and outside of optimal operating parameters that efficiency drops like a rock. And, as a general rule of thumb, I understand transmissions are about 85% efficient as well. This is just one small reason why we don't see too many prop cars!

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