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CrushAtlas t1_j6iljum wrote

For one, the forces are different. You're comparing the rotational force of a turbine against the reciprocating mass of a piston engine, the forces at high RPM are incredibly strong on a connecting rod.

Secondly, diesel engines are compression/ignition design and are very efficient and make lots of torque at low RPM so there is no need to spin it faster.

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sepientr34 OP t1_j6ilrae wrote

Why don't gas turbine have trouble burning fuel fast enough but diesel has (I never see sooth from gas turbine engine!)

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Fred2718 t1_j6iqqah wrote

Older aircraft jet engines could be very smoky, especially at low altitudes. This was a problem for many reasons, e.g. military stealth is tough when the bad guy can see your smoke trail from 30 klicks. The one I'm familiar with is the CJ805 on the Convair 990 circa 1970, and you could see it on landing approach from 5 minutes away.

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Sand_Trout t1_j6ioo90 wrote

Gas turbines can do a continuous burn to build pressure, limited only to the total flow of fuel and air.

Diesels are pulsed ignition, and are limited to how much fuel+air can fit in the cylinder without igniting early.

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