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This is a normal post They might well have a couple in there.
Miniature wankels are sometimes used in seatbelt pretensioners.
 (I helped save b3ta! jonbob loves you, Mon 14 May 2018, 16:25, Reply)
This is a normal post I thought they were driven by pyro charges?

(I helped save b3ta! wheresthefish Partly filled with wrong, Mon 14 May 2018, 18:32, Reply)
This is a normal post The charge drives a tiny little wankel motor.
https://jalopnik.com/watching-a-seatbelt-pre-tensioner-work-in-super-slo-mo-1790017803
 (I helped save b3ta! jonbob loves you, Mon 14 May 2018, 20:05, Reply)
This is a normal post TIL
Still can't get my head around how that would operate though, or why it would be considered better than an explosive in a piston.
 (I helped save b3ta! wheresthefish Partly filled with wrong, Mon 14 May 2018, 20:23, Reply)
This is a normal post At a guess
It acts on the spool, therefore a Wankel is actually a great choice because you're getting rotational energy out, with presumably far more torque than a mini turbine.
 (I helped save b3ta! evil_andy Stick stick stick stick sticky sticky stick stick, Mon 14 May 2018, 22:12, Reply)
This is a normal post How they work is easy.
Instead of putting fuel+air in you just use compressed air. With Wankels you don't have any valves to worry about. It's the same basic principle as a steam engine, where all you're interested in is having a ready supply of a high-pressure working fluid and you're not especially bothered about how the energy gets put into it.

As to why, I imagine it's though the force is spread over a comparatively longer time rather than all at once, which might hurt the passenger more than the crash would, and they may be cheaper to recharge than the piston kind.
 (I helped save b3ta! jonbob loves you, Mon 14 May 2018, 22:34, Reply)
This is a normal post So it’s an external gas generator, using the wankel rotor as a turbine?
I’m still puzzled by the whole concept as that means the suck and squeeze phases don’t happen, the bang phase becomes the power phase, and blow carries on as normal. You’d need to vent the first half of the chamber to prevent any compressive resistance.
 (I helped save b3ta! wheresthefish Partly filled with wrong, Tue 15 May 2018, 11:16, Reply)
This is a normal post good fact!
We need to know which cars use them because it would be awesome trivia killer -
what cars use a Wankel enginer?
All of them - I bet you a million pounds..
 (I helped save b3ta! The Ann Coulter Fan Club Babylon is burning at, Mon 14 May 2018, 20:41, Reply)
This is a normal post How about the first car to use one?
A huge failure, but a great looking and really valuable car, the NSU RO-80. I used to know where one was rotting away.
 (I helped save b3ta! The Togaboy The world will end on, Mon 14 May 2018, 23:55, Reply)