Abby’s Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > RPM's how important are they?
Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions |
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skier1
Location: South Eastern Wisconsin
Joined: Sep 28, 2009
Points: 35
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RPM's how important are they?
Original Message Dec 21, 2010 8:40 am |
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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.
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borat
Joined: Nov 10, 2007
Points: 2692
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Re: RPM's how important are they?
Reply #9 Dec 21, 2010 2:29 pm |
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Canadians get gouged every way possible when it comes to large consumer products. Automobiles for example were $10K to $20K higher priced than the same vehicle 30 miles away on the other side of the border. When Canadians started buying from US dealers around two years ago, the Canadian dealers went ballistic. They tried every angle possible to get the Canadian government to put an end to it. They claimed safety issues such as speedometers not being metric, U.S. vehicles not having mandatory roll over fuel cut out switches etc. Since then, Canadian dealers have lowered their prices substantially. The goose isn't laying as big a golden egg as it did three years ago. Some aspects of NAFTA actually work in favour of consumers. Sorry for being off topic.
This message was modified Dec 21, 2010 by borat
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starwarrior
Joined: Oct 27, 2010
Points: 91
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Re: RPM's how important are they?
Reply #10 Dec 21, 2010 7:15 pm |
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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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