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Miles per Gallon

Discussion in 'Technical Discussion' started by CVAZQUEZ, Aug 6, 2010.

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  1. CVAZQUEZ

    CVAZQUEZ New Member

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    How many miles per gallon will a 100+ foot boat get on 2X Detroit Diesel 12V92 TA's/1040HP engines?
  2. ScotL

    ScotL Senior Member

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    Maybe .01?

    You are looking for gallons per hour (GPH). We are not talking cars.
  3. Pascal

    Pascal Senior Member

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    depends on the boat, hull shape, beam and speed... 20 to 30 gph at 10kts should a good starting point, or 1/3 to 1/2 nm per gal
  4. Capt Bill11

    Capt Bill11 Senior Member

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    I rough guess is, max RPM you're burning say 110-120 per hour, cruise you're burning about half that.
  5. Capt Bill11

    Capt Bill11 Senior Member

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    This might help.

    [​IMG]
  6. kc135delta

    kc135delta Member

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    It is more along the lines of Gallons per mile, not MPG.

    If you need a rough estimate figure 20hp (used hp, not potential) = 1gph

    so a boat with 1000hp at 50% will be in the neighborhood of 25-30gph.

    Slow turning diesels tend to have a higher efficiency than mid rpm or high rpm diesels but they are prevalent 2000hp<. High RPM diesels are pretty efficient around max power though but won't last long.

    It's just one big game of losses
  7. NEO56

    NEO56 Member

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    I'll be short about this....if you can't afford the boat...you can't afford the fuel...period, nor the rest of the equation.
  8. Old Phart

    Old Phart Senior Member

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    I dunno
    Perhaps the OP desires a dock queen (live aboard) and is curious how much it

    will burn between the lift and slip and reversal. ;)
  9. NEO56

    NEO56 Member

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    Valid point Old Phart...I'm so happy to see that most of you who seem jaded, cynical posters, have a funny bone...it's refreshing! In case you've missed some of my posts (some of which have been deleted) I tend to be somewhat of a smart**s, I have this talent of ticking some people off...although I can assure you that it's like water off a ducks back. I am what I am, and I enjoy life and living...it's my intention everyday to find something to have a good belly laugh about...this Forum goes a long way towards that goal. On the other hand, I am truly impressed by the knowledge and expertise available on this Forum. Ya'll keep up the good work...and I'll do my best with my own knowledge base.
  10. olderboater

    olderboater Senior Member

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    If you can't afford the EZ2CY, then you can't afford the boat...period, nor the rest of the equation.
  11. NEO56

    NEO56 Member

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    Huh? I'm fairly certain I can afford any type of enclosure...but why buy EZ2CY if something else is better, available on the market...I just read about the panels cracking...nothing was said about how old they were, when the cracking occurred. It doesn't matter the costs...it's about longevity as far as I'm concerned. My first inkling is still to go with EX2CY...unless I have to shell out 800 bucks out for a cracked panel every 6 months. This is why I was asking. I am not Donald Trump...I do have a budget. Either that or you're yanking my chain.Just did a little math...I'm figuring 14 panels on the fly bridge deck at 800 bucks a panel every six months= 11,200 dollars...that equates to a lot of fuel. Thanks olderboater.
  12. Caltexflanc

    Caltexflanc Senior Member

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    See my post on the EZ2CY thread. It's not an age issue with the EZ2CY, it is an operator issue. Replacing just a large cracked panel shouldn't cost 800 bucks. I paid a third of that 5 years ago.

    By the way, the ones I didn't maltreat are 10 years old and doing just fine.
  13. JWY

    JWY Senior Member

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    I didn't see the OP asking about affordability, I assumed it was a question pertaining to range.

    And if it were a question of economy, seems like a prudent concern. I wouldn't want to see us discourage a potential boater based on jumping to conclusions of what s/he may or may not be able to afford. More specific questions and answers could be more beneficial. I know of many a boater enjoying the live aboard and cruising lifestyle on a budget very dependent on economy of fuel consumption. I admire them, not denigrate them.

    Judy
  14. NYCAP123

    NYCAP123 Senior Member

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    Plus 1+.
    I belong to the AGLCA. These are people doing some serious cruising (6,000 miles+). Many are retired and living aboard on fixed incomes. Economy is very important to them. They want to do miles, and miles cost money.
    Like with EZ2CY or anything else about boats, bigger and better is not always best. What's more important is having the item that does the job best for you. A 100' yacht is beautiful and impressive, but it's useless on the Erie Canal. EZ2CY is great, but if yours is a boat where it'll be abused, maybe you're better off getting the cheapest isinglass and just replacing it more often. If you're traveling 6,000 miles and time isn't a factor, why get a boat that does 30 knots and burns 100 gph.

    There's an old saying in the luxury markets 'If you have to ask the price, you can't afford it'. Well that goes right along with 'A fool and his money are soon parted'. I equate every dollar saved with gallons of diesel, and gallons of diesel with miles that can be traveled.

    I'd rather have a 28' that travels than a 100' dock queen. If I'm too busy working so I can make the payments that I can't afford the time to use it what's the point in having it?
  15. Capt J

    Capt J Senior Member

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    It really depends on hull design. But lets just say an older Broward 100' with 12v92's. At 10 knots you're looking at 15 gph (1000rpms), 12 knots (1200rpms) 30gph
  16. RER

    RER Senior Member

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    I think the OP made his calculations and has traveled many miles from this forum since his 08-06-2010 post.
  17. K1W1

    K1W1 Senior Member

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    Hi,

    Maybe he ran out of gas on the way to wherever he was headed.


    Last Activity: 08-11-2010 07:29 PM
  18. Capt J

    Capt J Senior Member

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    He ran out of gas long before he started this thread. The boat is diesel!!!!!!! hahahaha
  19. K1W1

    K1W1 Senior Member

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    Hi,

    Where did I state he was travelling by boat?