Re: [PSUBS-MAILIST] counter rotational

[MerlinSub@t-online.de]

Can be up to 25%. 

http://www.luftpiraten.de/px/lexikon/gegenlaufprop.jpg

http://www.volvopenta.com/volvopenta/singapore/en-sg/marine_leisure_engines/drives/dps_duoprop/pages/the_benefits_of_duoprop.aspx

vbr Carsten


<jimtoddpsub@aol.com> schrieb:
> David, I'm sure it varies, but 10 percent increased efficiency is sometimes quoted.  -JT
> Sent on the Sprint® Now Network from my BlackBerry®
> 
> -----Original Message-----
> From: David Bartsch <dbartsch2236@hotmail.com>
> Sender: owner-personal_submersibles@psubs.org
> Date: Thu, 30 Dec 2010 02:37:39 
> To: <personal_submersibles@psubs.org>
> Reply-To: personal_submersibles@psubs.org
> Subject: RE: [PSUBS-MAILIST] counter rotational
> 
> 
> Thanks gang,
>  
>    Torpedo use is definitely out. After a little thought I think the real problem when using such a drive  on a submarine would be to be able to seal these two separate shafts from leakage from sea pressure. Still, placing two such props inside a kort nozzle could give some awesome results...I'll follow up on your provided references.
>  
> David Bartsch 
> 
> 
> From: JimToddPsub@aol.com
> Date: Thu, 30 Dec 2010 02:08:21 -0500
> Subject: Re: [PSUBS-MAILIST] counter rotational
> To: personal_submersibles@psubs.org
> 
> 
> 
> David, here are a couple of links re contra-rotating shafts.
> -Jim
>  
> http://www.springerlink.com/content/t821016235773860/
>  
> http://www.maxxprod.com/mpi/mpi-266.html
>  
> 
> In a message dated 12/30/2010 12:03:38 A.M. Central Standard Time, dbartsch2236@hotmail.com writes:
> Anyone have a clue as to how a single shaft dual rotating propeller gear box works? Drawings? 
>  
> David Bartsch
> = 		 	   		  
> 




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