RPM's how important are they?

Location: South Eastern Wisconsin
Joined: Sep 28, 2009
Points: 35

RPM's how important are they?
Original Message Dec 21, 2010 8:40 am

OK. so reading posts, thinking (never agood idea) and just all around observing, Is a Honda machine more effective because it runs at a higher RPM?

I have the Tiny Tach on my Simplicity and it runs at about 3500-3600 unloaded and it bogs to about 3200 with a load.

Make no mistake, I have no performance issues with it but hearing the praises and the like, does a Honda run faster, and have faster "gearing" on the impeller so the snow goes farther.

starwarrior

Joined: Oct 27, 2010
Points: 91

Re: RPM's how important are they?
Reply #10 Dec 21, 2010 7:15 pm

Horsepower = Torque x RPM, but Torque is not constant across the rev spectrum of an engine.
For gasoline engines, there is generally very little torque at low rpms, flat torque across the middle rpms, and then a drop off as the engine starts spinning too fast for complete combustion.
So, the short answer to your question is that the direct relationship between horsepower and torque changes the across the rpm range and the resultant horsepower curve will vary as the rpm changes.
Starwarrior

This message was modified Dec 21, 2010 by starwarrior

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