[AT] Statistics In Tractor Manufacturing Was Bicycle Program

[Jim Becker]

Several years ago, my brother and I were comparing odometer readings on our trucks.  My truck was older and had a lot more miles.  Then we checked hours.  His had a bunch more.  His truck use was probably pretty typical, including a fair amount of local driving.  As I recall, he averaged close to the expected 35.  I rarely use mine to just drive around on short errands.  Most of the mileage is on longer trips.  Earlier today, it turned over 100,000 miles and is just over 2,000 hours.  The average is 49 mph.  Since my highway speed is usually 70 or more, it seems it would be tough to get a long term average much higher.

Back in the good old days, hour meters were typically grounded through an oil pressure switch.  If the engine wasn’t actually running and producing oil pressure, the hour meter wouldn’t clock time even with the switch on.

Jim Becker

From: Mike M 
Sent: Monday, September 16, 2019 3:08 PM
To: at at lists.antique-tractor.com 
Subject: Re: [AT] Statistics In Tractor Manufacturing Was Bicycle Program

I have a Scag zero turn that I bought new, I put about 350 hours on it over the course of several years.  When I parked it this last fall, I accidentally left the key on, so when I went to start it this Spring I had 3500 hours on it. Fortunately my daughter works at the dealer so I was able to buy a new one.  

Mike M

From: Stephen Offiler 
Sent: Monday, September 16, 2019 7:32 AM
To: Antique Tractor Email Discussion Group 
Subject: Re: [AT] Statistics In Tractor Manufacturing

For the record, in automotive engineering, the conversion between engine hours and road miles is usually taken to be 35, not 60.  I've also seen 33 used.  It's a broad approximation of course  Vehicles used extensively on the highway will be somewhat higher, and vehicles used extensively in heavy traffic/city conditions will be somewhat lower.  It would be exceptionally rare to find any roadgoing vehicle averaging 60mph. 

SO
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