|
|
|
|
|||||
|
||||||
Subject: Re: [worldcruising] Folding and Feathering Props, Etc..
From: Bryan Genez (yachts@XXX.XXX)
Date: Thu Jan 25 2001 - 11:43:22 EST
At 9:30 AM -0500 1/25/01, mark_melvin@XXX.XXX wrote:
>In the MIT studies the MaxProp had the BEST stopping and
>reversing of all props (better than fixed, folding, or
>self-pitching), due to the fact that the blades completely
>reverse so that the lobes are properly oriented and when reversed
>they have a fixed "stop" against which to bear, making them a
>reverse-oriented fixed prop in the approximately 1/2 revolution
>of the shaft it takes for the blades to reverse. Not all
>feathering props do that, it is a feature of the MaxProp (which
>also costs double what other feathering props cost)
I believe the Autostream feathering prop (marketed by Martec in the
US) has the same characteristics you show for the Max, PLUS the
ability to independently set pitch for forward and reverse, PLUS the
ability to adjust pitch without disassembly, all for a cost of about
2/3 the Max Prop "Classic" (the model that requires disassembly to
adjust pitch). The more expensive Max prop model that allows pitch
adjustment without disassembly is about twice the cost of the
Autostream.
I also have a 3-blade Max, but if I were purchasing today, the
Autostream would be my choice.
-- Best,Bryan "Capella" Valiant 40 #158 mailto:yachts@XXX.XXX
===================================== to unsubscribe email to: worldcruising-unsubscribe@onelist.com
|