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

[John Marshall]

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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