Quote:
Originally Posted by P-hack
way oversized and starts on gasoline, and runs mainly on used motor and machine oil, with no attempt at computerized emissions. I don't mind grabbing some popcorn and watching, but this really needs to be somewhere else besides "Fossil fuel free".
|
Large amounts of bio oils ( vegetable and animal based ) are available to burn in some municipalities. So, there is some value in the idea. However, I do agree this should be under some other topical heading.
At an early point in automotive development, the car engines were often large (8 L) and slow turning ( idle of 300 rpm and operating maximum of about 1800 rpm ). Manually adjusted fuel mixtures and ignition timing were the norm. But, with the advent of ignition advances and improved carburetion, smaller, higher reving engines became the path to follow. However, even the very large 13 L engines could return 20 mpg - a mileage almost the same as the much smaller model T.
Large displacement, low revolving engines do have efficiency advantages over smaller higher spinning engines. At least as far as specific power.