Sunday, June 1, 2014

RE: [Electric Boats] Electric Goliath ASD Tug vs. Goliath Diesel Tug

 

"Thank you for the suggestion Matwete,  However, I have found that prop guards specifically do nothing for the thrust.  With a Kort nozzle or a Rice Nozzle, the thrust and speed of the boat are drastically improved.  They report as much as 30% over an open prop in a Bullard pull, and 17% out in open water. increases in thrust, speed, maneuverability, etc."

 

AeroDan-

 

I'd  be curious to hear what your findings as regard Prop Guard ® thrust specifically were.  Or are you loosely lumping all "prop guards" from all vendors into this comment?  I was specifically referring to this manufacturer. www.propguard.net

Going to their website, their "Test Results" indicate significant gains in thrust (13-100%) and speed at RPM.

While that could be all sales pitch (doubtful), I personally have been very happy with my 9-10 years' use of the 14" PropGuard on my electric boat "The Reach Of Tide".  It was like night and day comparing the difference between my outboard without and with this installed.  I would rather invest money in a larger, shallower pitch prop at this point than keep the current prop and take a free Kort prop nozzle.  I just can't see the gains being much more than I've seen and it wouldn't look as good.

 

YMMV-

 

-Myles Twete, Portland, Or.

Moderator, ElectricBoats Forum

 

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Posted by: "Myles Twete" <matwete@comcast.net>
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