Cloud Dancer wrote:
427435 wrote:
jmtandem wrote:
I am a retired Engineer also and designed engines. You can not argue with the equations above. they work for both gas and diesel,in fact any engine.
Let's keep it simple!! Go to any NASCAR race or drag strip. See that they are talking about weight/HP not torque to make there machines do something faster.
It also works for Motoehomes!!!
The purpose of a race car is to go fast. Horsepower is more important than torque as the car is relatively light and needs to possess violent acceleration and high top speeds. The discussion of this thread is to get a heavy motorhome up a mountain; horsepower is less important than torque. It is not the same desired results as what is needed in a race car. 40,000 pounds of MH towing a 3800 pound car behind up six percent grades that are miles and miles long. It is not the same thing. And what does the Holiday Inn reference mean?
In either case, speed on a race track or speed of a heavy MH up an incline----------the more hp, the faster you go. What a high torque rated engine may give you is less need to shift gears frequently.
Again, no one has explained how a high reving gas turbine (with torque levels under 300 ft-lbs) can move heavy tanks up steep inclines if it is only engine torque that does it.
It's THRUST that propels that tank. And, if you give me the total gear ratio and the rolling radius of the track drive, I'll calculate the amount of thrust.
First, tanks don't use their gas turbines as thrust engines but as engines that turn a gearbox--------just like any other internal combustion engine powered vehicle (a gas turbine is an internal combustion engine, by the way).
Second, thrust is also what you get from the tire turning and pushing its vehicle along, so what is your point??