A Simpler Explanation Of The Measurement Of ONE HORSE POWER
One horsepower equals 550 foot pounds (pound feet) per second. In high school, in physics class, I generated 1 horsepower by running up a flight of stairs. :) Housted
Forum Discussion
MEXICOWANDERER wrote:
Torque
You probably mean torque of the engine's crankshaft as applied about directly (~1:1 transfer ratio) to the jet pump.
However, perhaps the gas engine should have been run at a higher RPM to actually get full it's full HP, and then the appropriate gear-down-ratio (via gears, pulleys, belts, etc.) used to reduce the spin rate of the jet pump to what it would be when powered with an electric motor.
It's a bit of a dance to properly tap a high-RPM-band gas engine's horsepower so as to hit it's sweet spot crankshaft torque required to get the needed torque on the axle spinning the load. A diesel has a much more restrictive RPM range, so it seems like it pulls loads "better" because it sounds like it's working less and it's doing it with less gear changes.
Modern gas engines have a bunch of gears for several reasons.
