We all love our little Flathead 4's here so when i ran across this Vid, I thought some of the engine Geeks here like myself might enjoy this.
I agree, I find it amazing that they can make an engine about the same over all size of the old 20hp T engine and make unbelievable house power out of it.
And do it without breaking a crankshaft!
OK, so they just added a ton of extra rotating mass and 16 or so extra bearings. Plus the control system and more reciprocating mass.
Tractors in the teens were made with variable compression so that you could start them on gasoline with the hand crank and them switch over to diesel with the engine warmed up a little. There was an extra chamber at the top with a valve that opened. Seems to me that this is a more simple solution.
Really enjoyed watching that. It is a remarkable engine.
I designed a variable compression engine in 1965. I'm glad to see someone has perfected it.
My wife's GMC Terrain direct-injection four is great. 34 mpg hwy, 27 combined. I've got 91,000 miles, no issues, no oil burning. Totally trouble-free in almost 6 years. Has the acceleration and passing times of a small block 2bbl V8 of the 60's. 6 speed auto tranny. These small engines have been refined beyond belief.