Friday, June 17, 2011

Re: [Electric Boats] Re: Incremental Options

 

I agree, and I never said it was a new idea waiting to be discovered. The flow meter has a system designed to rotate based on water flowing passed it.
Very similar to what is required when attempting to Regen under sail. Propulsion & Regen are separate issues and trying to attempt to produce practical results
for both using (1) sailboat prop seems futile.





-----Original Message-----
From: Eric <ewdysar@yahoo.com>
To: electricboats@yahoogroups.com
Sent: Fri, Jun 17, 2011 11:48 am
Subject: [Electric Boats] Re: Incremental Options

 
While this type of water screw may provide accurate flow measurements, various groups, including goverments, have spent hundreds of years refining propellers to push boats around. The familiar bladed propeller has been proven to be more efficient and effective for propulsion again and again.

If I remember correctly, the "Turtle" submarine built in 1776 had hand-powered water screws for propulsion that were very similar to the photo in the link that you posted. So these aren't really a new idea that is waiting to be discovered.

Fair winds,
Eric
Marina del Rey, CA

--- In electricboats@yahoogroups.com, GNHBus@... wrote:
>
> http://commons.wikimedia.org/wiki/File:Dumas_Neyrpic_Current_Meter.JPG
>
> Interesting selection for "screw" on this flow meter
>

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