[PUP] BSFC (wasKrogen 55 Expedition vs Dashew FPB64)

[Robert Miller]

John,

It was a bit of an open ended questions.  My wife and I intend on coastal
cruising for a couple of years learning the systems and seamanship.  We plan
on circumnavigating at some time after that.  Possible a 2-3 year trip.  I
was just hoping for some answers from folks that have experience and what
choices that would make.

Thanks for your help.

Regards,

Robert Miller


> From: John Marshall <johnamar1101 at gmail.com>
> Reply-To: Passagemaking Under Power List
> <passagemaking-under-power at lists.samurai.com>
> Date: Sun, 21 Oct 2007 12:25:57 -0700
> To: Passagemaking Under Power List
> <passagemaking-under-power at lists.samurai.com>
> Subject: Re: [PUP] BSFC (wasKrogen 55 Expedition vs Dashew FPB64)
> 
> That's an incredibly complicated question, Robert. Sort of like
> asking what's the best car to buy without giving the respondent any
> other information. If you can summarize your planned usage, likely
> routes, planned ocean crossings or coastal cruising, etc. etc. etc.
> The boat at the top of one list of requirements might be at the
> bottom of another.
> 
> John Marshall
> 
> On Oct 21, 2007, at 9:35 AM, Robert Miller wrote:
> 
>> Not to take away from your conversation about the Krogen and
>> Dashew, but
>> this is my first post to PUP.  I would like to know from you what you
>> consider the top five passage makers to be and why.  My wife and I are
>> getting very close to retiring to a boat and intend on extensive
>> cruising.
>> I have been reading Passage Maker for some years now and would
>> really like
>> some "real world" help on the purchase of a passage maker.
>> Considering
>> safety and fuel consumption, I could really use some help.
>> 
>> 
>> Kindest Regards,
>> 
>> Robert Miller
>> 
>> Imagecom, Inc.
>> 3729 East 82nd Place
>> Tulsa, Oklahoma 74137
>> robert at imagecominc.com
>> 918-704-8233
>> 918-494-0012   FAX
>> 
>> 
>> 
>>> From: <Truelove39 at aol.com>
>>> Reply-To: Passagemaking Under Power List
>>> <passagemaking-under-power at lists.samurai.com>
>>> Date: Sun, 21 Oct 2007 08:18:22 EDT
>>> To: <mikem at yachtsdelivered.com>
>>> Cc: <passagemaking-under-power at lists.samurai.com>
>>> Subject: [PUP] BSFC (wasKrogen 55 Expedition vs Dashew FPB64)
>>> 
>>> Hi  Mike -
>>> 
>>> I  think we need to compare similar horsepower engines for this
>>> discussion,
>>> and I think 0.275 is pretty optimistic for 400HP. What engine is
>>> achieving
>>> that  figure?
>>> 
>>> Within  a reasonable range of HP,  4-stroke engines will have
>>> approximately
>>> the  same BSFC at the same rating, i.e. at max torque, where BSFC
>>> is lowest,
>>> and at  max HP, where it is typically 0.05 lb/hp/hr higher. Same
>>> is true for
>>> 2-stroke  Diesels, which will burn about another 0.04 more than a
>>> 4-stroke.
>>> 
>>> Of  course MMMV!
>>> 
>>> Regards,
>>> 
>>> John
>>> "Seahorse"
>>> 
>>> 
>>>> Smaller engines generally use more fuel per pound of horsepower
>>>> per hour.
>>> The 60 hp Isuzu 4JB1 uses about .350 pounds per hour per  horsepower.
>>> A 400 hp engine is more likely to be about .275.
>>> 
>>> This  detail is one factor which can not be  ignored.
>>> 
>>> 
>>> 
>>> 
>>> 
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> _______________________________________________
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> 
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> 
> Passagemaking Under Power and PUP are trademarks of Water World Productions,
> formerly known as Trawler World Productions.