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Re: Question About Power Cats
[Re: JustBS]
#122155
02/27/2017 04:05 PM
02/27/2017 04:05 PM
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Joined: Jan 2012
Posts: 482
706jim
Traveler
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Traveler
Joined: Jan 2012
Posts: 482
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We did a 10 day trip on a Moorings 474 powercat. Fuel including generator use was just over $300 from what I remember. (You could search my past posts for a more accurate number). If you run the cat at a modest speed (we did 8-9 knots) it won't burn that much fuel at all. Considering that the distances in the BVI are quite short there's no real need to go roaring around at 20 knots even if the boat is capable of it. And a couple of benefits to the power cat include a much higher and larger flybridge (everyone will want to be up there trust me) and the lack of rigging for the sail. This makes the front deck more usable and mooring a lot easier. Our trip was your typical BVI loop including a visit to Anegada.
Last edited by 706jim; 02/27/2017 04:06 PM.
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Re: Question About Power Cats
[Re: GeorgeC1]
#122164
02/28/2017 02:51 PM
02/28/2017 02:51 PM
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Joined: May 2004
Posts: 633
BaardJ
Traveler
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Traveler
Joined: May 2004
Posts: 633
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GeorgeC1 said: Keep in mind that fuel flow is load not rpm dependent. If you are running both motors at a given rpm there will be less load and lower fuel flow then just one motor on a per engine basis. I experimented quite a bit with a voyage 440 cat on one verses two motors. In the end I found that if you ran two motors at the same cruising speed as one motor the difference in fuel burn was about 20%. The big savings comes from slowing down. G You're correct George. For me to regain the 0.8 kt speed difference running with just one engine, I have to raise it by ~300 RPM which lowers my net fuel savings from 100% to 25%~50% depending on the reference cruising speed/RPM (more savings at lower speed/RPM).
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