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Re: [PSUBS-MAILIST] bionic propeller



In a message dated 11/20/2010 10:37:23 A.M. Eastern Standard Time, JimToddPsub@aol.com writes:
eliminate the possibility of snagging on something as much as possible, and a Kort is part of that.
I imagine there is some loss of efficiency but I have seen a few thruster designs where the props and motors are enclosed inside a "fairing" and water flow is "ducted" to the props. This eliminates entanglement issues but again, probably would slow the boat a bit.
As an example, think of the props on the James Bond Car that was a submarine. It was a Lotus I think but the props were visible at the back end and water going TO the props went through a grille type plate below the vehicle.
That vehicle was actually built and was a working "wet ambient" sub where the pilot wore scuba gear. Of course, in the movie it was portrayed as a "dry 1 ATM. sub"
Still, it was an early inspiration to me.
Frank D.