If it can be brought to production, it will be great. I was thinking of a wankel-powered apu for longer range, having worked on a French-derived version in my far distant youth, but this would be so much better.
Sorry guys its not possible - it is a heat engine - modern diesels get within 90% of the theoretical maximum using modern materials
75% efficient with zero losses and zero friction implies
(Temp IN - Temp OUT) / Temp IN = 0.75
Temp Out - has to be above 300degrees Kelvin (or you can't reject the heat)
So temperature IN has to be above 1200 degrees Kelvin - 927C
That is the average inlet temperature during the combustion - several things happen at those temperatures
Steel loses 90% of it's strength
And most importantly - all of your thermal losses go through the roof!
Its the same as the guy promising to pack 2000 liters of water into a 200 liter container
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