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...
JD Snowmobile Performance Determination '79
Re: JD Snowmobile Performance Determination '79
OK, I can't get the jpeg to upload.... assistance?
Re: JD Snowmobile Performance Determination '79
That's super interesting and cool!
1975 John Deere 800
1975 JDX8 (VC Finisher 2019)
1976 440 Cyclone (VC Finisher 2022)
1974 El Tigre 440 (Sold)
1996 Arcitc Cat 440Z
1975 JDX8 (VC Finisher 2019)
1976 440 Cyclone (VC Finisher 2022)
1974 El Tigre 440 (Sold)
1996 Arcitc Cat 440Z
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