[PUP] Emergency Power (The Dashew's trip planning)

Ronald Bonvie ronbonvie at comcast.net
Mon Mar 3 08:18:32 EST 2008


The max prop is a geared prop the most pronounced difference ,in the gearing 
is that the max prop's gearing is enclosed in the hub and the gori is 
external. The only way for a max prop to have a blade that does not open at 
the same time and amount would have to be a gear failure. I do agree that 
the max prop, in light of the way it feathers would be more susceptible to 
fouling.

Ronald Bonvie
6202








----- Original Message ----- 
From: "Dave Cooper" <swansong at gmn-usa.com>
To: "'Passagemaking Under Power List'" 
<passagemaking-under-power at lists.samurai.com>
Sent: Monday, March 03, 2008 6:59 AM
Subject: Re: [PUP] Emergency Power (The Dashew's trip planning)


> The shape and construction of a Max prop tends to catch and hold small
> lines, especially monofilament, which can lodge between the pivoting 
> blades
> and the hub. Less of a problem when they are located behind a keel in a
> sailboat than when they are out in the free water to the side like a wing
> engine.
>
> The Martec folding props can fail to open a blade and are worthless when
> they fail requiring a trip over the side. The geared folders like the Gori
> and similar ones make sure both blades open at the same time and amount. A
> better mousetrap, IMO.
>
> As always YMMV....
>
> Dave & Nancy
> Swan Song
> Roughwater 58
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