Gregory's Server@malwaretech yup. combustion engine efficiency gets a lot worse when you have to keep them compact and lightweight. they're a bit less awful when you scale them up to oil tanker sized ones, but then they go and spoil it by running them on HFO.
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 @malwaretech sounds about right given the sheer amount of thermal power they dissipate through the radiator and exhaust gases.  @gsuberland @malwaretech One reason the Prius is so efficient despite being a gas only car is that the engine can be designed for a very tight, well defined operating envelope. @gsuberland @malwaretech yep, using the kinetic energy of expanding gasses is straight up the least efficient way of converting petrol into momentum, it's basically a side effect of combustion, most of the released energy is heat. |
@gsuberland I knew they'd be bad but some getting only 12% efficiency brand new is mindblowing