hours to miles

Disscussing old, rare, very specific or otherwise uncommon units and measurements
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hours to miles

Postby maurice » Sat Oct 17, 2009 1:24 am

I work on standby generators, ans I was wondering if there is a formula to convert the hours on them to milage, approximate I realize. I was told that 4,000 hours are equivelant to 250,000 miles.

Re: hours to miles

Postby Ken Chevy » Fri Nov 06, 2009 3:32 pm

MOST standby generators have to spin at 3,600 RPM. If they are 1 to 1 then the engine running them is turning at 3,600 RPM too. But, some have larger engines with a bigger pulley on them so the engine can run slower, producing better fuel "mileage" and saving wear and tear on the engine.

As far at what you were asking: Just use the figure 1 mile per minute, no matter the engine speed. One MPM = 60 MPH since there are 60 minutes in an hour.

Thus, your 4,000 hours on the hour meter would be 4,000 hours x 60 MPH = 240,000 miles.

1,235 hours on the hour meter? 1,235 x 60 = 74,100 approximate miles on the generator.

Things like that are usually simple and easy to figure out like that. 6,123 hours on the meter = 367,380 approximate miles.

Since they are running at a CONSTANT speed, their (the engines) longevity will be much more than an engine in a vehicle because the engine is speeding up and slowing down all the time. Assuming proper maintenance is done on the engine and generator they should probably last at least four times what a vehicle engine would last. Lots of those are lasting 150,000 to 200,000 now, so a properly maintained generator engine should probably get 600-800,000 miles, or dividing it: 10,000 to 13,333 hours. That is assuming QUALITY equipment and proper maintenance is performed at the recommended intervals.
Ken Chevy
Posts: 57
Joined: Mon Sep 26, 2005 11:22 am
Location: Salem, OR, USA

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