Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

All kinds of flywheels can explode when stressed.

Imagine the flywheel letting go right between your legs...
in a Slingshot drag racer!  Thankfully, there are special
shrouds to keep your legs and jewels safe.

From my own experience....I had a blade come off a 1962 Volvo
engine fan (two-bladed) when I blipped the gas just before
shutting it off.  Bang, and right thru the hood.  Never found
the blade.  Perfect exit slot in the hood.  And, a blade came
off a Chevy six fan right thru the inner wheel-well cover.

Gotta watch out for that 'third' time!

Lucky to be alive,
Wayne