If you take a perfectly good engine and wash it in hot water...

95,00 RPM
Flame engine
Auto Union
Cool cat
Needs a second look

My first second look was at the W32 Patelo that runs with coins balanced on edge.
https://www.youtube.com/watch?v=ZVuKp5M3de8
And another one of his
https://newatlas.com/spanish-enginee...-engine/20636/

He gets a 10.0 on a degree of difficulty that is off the chart.

No problem, just take a full sized engine, wash it in hot water, and tumble dry. If it's not small enough, repeat. :haha:

The trouble is shrinking the vehicle to scale.

And the people to drive it. ;)

I bet I know where Patelo gets his springs.

Auntidigr bought new a Datsun B210 that ya could stand a nickel on its edge on the air cleaner while it as running.

French creativity...

Damn, a V-8 Model T...

The Japs had grabbed all the rubber trees(along with the land under them and people who farmed them) long before Pearl Harbor, so inventor Earst Meili came up with this substitute...

They were also called "spring wheels" and "airless tires."

http://s2.e-monsite.com/2010/04/23/0...heel-Meili.jpg

http://www.unusuallocomotion.com/med...g?fx=r_950_950

Both those links are Meili's work. I think he also came up with a smoke detector, and some sort of light bulb.

Can't trust LEGO...

I've seen a lot of tractors that size do that. Most of the time, on their own.