If you have ever seen an Unducted fan engine or any of the very high bypass
fans they have lots of blades. Not quiet a propeller but close. Rich Fox
----- Original Message -----
From: <<land-speed@autox.team.net>
Sent: Monday, January 06, 2003 01:53 PM
Subject: Re: How Many Blades
> Neil wrote : Well, in water an efficient screw design will look
a
> lot
> different than an efficient prop that runs in air ........
> I believe you hit the nail on the head ! I've seen a lot of
> airplanes since
> the late 30s with two and three bladed props ( and four on bombers ),
> but none of the subs I ever saw had two or three blades . Most of the wind
> generators I see when we go into California's Cental Valley ...... at
Altamont
> Pass, I think, have two or three blades, also . I never saw any Savonius
Rotor
> type generators there, but they are used in some locations .
> Bruce ....... 34 years at Electric Boat where our only finished
> product was Submarines .
> PS : possibly Bushnell's "Turtle" had only two blades, powered by the
> sailor inside ! It was launched just a few miles from my home, in nearby
> Old Lyme, Connecticut, and Benjamin Franklin was there that day to assist
> and observe ....... a bit before my grandfather's time .
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/// what is needed. It isn't that difficult, folks.
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