JD Snowmobile Performance Determination '79

[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]

OK, I can't get the jpeg to upload.... assistance?

[540fan]

See attached

[jep_800]

That's super interesting and cool!

[AirborneX4Special]