On Jun 15, 11:10*pm, Bennett wrote:

BTW, what is an Air Turbine; what does it do?

It pushes air through a long hose to an airline respirator. So unlike
a fan, it's pushing a small amount of air, 4-5 CFM typically, but high
pressure is needed to push the air.
Really, the people who are criticizing the motor design should send
their ideas to Turbine Products. I'd be interested to hear what he
has to say.
Laura