JD Snowmobile Performance Determination '79

General topics related to John Deere Snowmobiles
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540fan
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Joined: Tue Mar 27, 2018 7:46 pm
Real Name: Dan
Location: Land of no snow

JD Snowmobile Performance Determination '79

Post by 540fan »

No simulators, no computers, just engineers figuring it out...

So here's a "blueprint" from '78/79 looking at tracks, sprocket pitch, and different sleds. Hand generated data, analog math, and someone on a drafting board. And of course notes at the bottom. In the notes, you will see they were looking at configurations, for the Spitfire...
540fan
Posts: 16
Joined: Tue Mar 27, 2018 7:46 pm
Real Name: Dan
Location: Land of no snow

Re: JD Snowmobile Performance Determination '79

Post by 540fan »

OK, I can't get the jpeg to upload.... assistance?
540fan
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Location: Land of no snow

Re: JD Snowmobile Performance Determination '79

Post by 540fan »

See attached
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52843293-C47F-4DFE-B247-BEC4AD8017BA.jpeg
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jep_800
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Real Name: Jason
Location: Grand Forks, ND

Re: JD Snowmobile Performance Determination '79

Post by jep_800 »

That's super interesting and cool!
1975 John Deere 800
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1976 440 Cyclone (VC Finisher 2022)
1974 El Tigre 440 (Sold)
1996 Arcitc Cat 440Z
AirborneX4Special
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Re: JD Snowmobile Performance Determination '79

Post by AirborneX4Special »

:popcorn:
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