Niels Abildgaard

Hot air fans once ran a competion on fuel efficiency
For IC engines ,rules could be :
How little fuel to make 250 Wh over 15 minutes where power level shall be within 1000 W plus minus 100W.
No batteries ,supercondensors etc allowed.
My first try will be a 26mm bore 40mm stroke two stroke with 6000 rpm.Load can be a calibrated Eiffel test bar.

To minimize flow and surface disadvantage of sidevalves, the valve  heads can be closer to cylinder bore by anglin like in mr Masons Mastiff.

Why not a single cylinder with generator and two traction engines?
The most difficult problem for diesel on rails were to get the power to the wheels .
Making  a 6 cylinder 1.2-2 kW combustion engine + transmission able to start ,accelerate and run1-2 ton is not for amateurs.
The original 6 cylinder full size engines ran ca 600 rpm and a modern portable 1.5kW single cylinder run ca 3600 rpm.
A suitable 180£ portable here



and a picture of core

Turn the Morse taper away with carbide and use ER system?

Quote from: AlexS

After that connecting rod Titanium.

Titanium is NOT a good bearing material.