This is growing into a huge discussion over the interpretation of fractured english. (No offense intended for Motorboy)

What my interpretation as to what he said is that the ratio of lubricant to high calorific material varies between glow and diesel.

Diesels and Glow need the same amount of oil, but less fuel. The ratio of lubricant increases in a diesel.


We are getting sidetracked here. The surface area of the crank bushing in a PB engine is very large, therefore a lot of oil is needed to keep it constantly coated. Ball bearings are naturally lower friction AND they have the benefit of containing oil very well.

How big is the connecting rod bushing on the biggest nitro airplane engine you can think of?

Also, being right in a pressurized vessel with a hole specifically to allow lubricant in, it is very easy to keep it sliding.

Oil IS coolant for the engine. If the film is maintained so well, why does an engine get hotter when you lean it out? (assuming you maintain the same RPM)

And also, consider this, in a full size diesel, they maintain such a large oil reserve simply for the purpose of heat absorption.









The most important point here.