Moderate Speed... Any Weather

Discussion in 'Boat Design' started by ALowell, Mar 22, 2007.

  1. Alan Mikkelsen
    Joined: Sep 2007
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    Location: Montana

    Alan Mikkelsen Junior Member


    So how did the tests go? I saw one of these boats in Alaska and they really iimpressed me.
     
  2. Geoh
    Joined: Jan 2007
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    Location: Arizona

    Geoh Junior Member

    Allweather boat

    Hello Allen
    Spent 2 weeks on Lake Mohave...40 plus hours trying to break something...
    Engine and all mechanical fine...29 hp Perkins 3300 wot 8 mph 2500 rpm to 2700 seemed to move it along 6.5 to 7 mph ...over 3000 it wanted to run a little hot after a while...
    Gonna change all the fluids and filters and it still has about half a tank of old fuel to get rid of or cleaned up before i take it out to sea...
    engine specs 3600 wot original props were 17 10 but the one on my boat was put on by last owner in early 1997 is 14 9 I bought the prop book and by all the numbers the 14 9 is correct size but looks like a toy on the boat. Got a gut feeling that the 17 diameter prop is what works best in rougher seas and weather...only looking for hull speed of 6.5 knots.
    Redid the interior white paint on all interior exposed fiberglass and Home Depot had some Mahogney real hard wood prefinished flooring that i paneled the rest of the interior with...new formica counters...Now I can have the "yachting crowd over for cocktails"

    Here is a site http://www.itsuro.com/boats.html about a trip to Alaska this summer on the inside passage in a boat almost exactly like mine...
    I am still an Alaskan resident so plan on registering it in Ak rather than AZ so i can paint "Homer AK " on the stern as home port...Homer Hughes is the boats builder... http://allweatherboats.com/

    George Hood
     
  3. Alan Mikkelsen
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    Alan Mikkelsen Junior Member

    Sounds great. Thanks for the link. How did you find your boat? They're not exactly very common.
     
  4. Geoh
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    Location: Arizona

    Geoh Junior Member

    craigs list
     
  5. kengrome
    Joined: Jul 2006
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    Location: Gulf Coast USA

    kengrome Senior Member

    ALowell, it has been 5 months since you created this thread. What is your current status? Have you selected a boat to build or are you still considering alternatives? If you have selected a boat which one is it?
     
  6. Alan Mikkelsen
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    Alan Mikkelsen Junior Member

    I'm a little suprised about the rpm numbers you're talking about. Is that a 3 or 4 cylinder motor? I have quite a bit of experience with perkins engines in tractors (retired farmer). They've all redlined about 2500 rpm, maybe once in a while 2700 rpm. Their pto rpm is usually about 1900, and a good 'sweet' spot is about 1500-1700 rpm on the torque curve. I wonder if you need more prop to get down to those numbers, or is this simply a higher revving engine than I have experience with?
     
  7. Geoh
    Joined: Jan 2007
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    Location: Arizona

    Geoh Junior Member

    Hi Alan
    The engine is a 1987 3 cyl parama M30...Volvo Penta now builds them as 2030 penta...
    My next step will be to clean the heat exchanger as it looks like the previous owner might have been using auto antifreeze rather than the recomended type...
    I just got my truck shipped dn from AK so now i can get serious about getting on the water...Also temps here in Bullhead aren't 110 to 120 anymore...

    George
     

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  8. Landlubber
    Joined: Jun 2007
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    Location: Brisbane

    Landlubber Senior Member

    Have to agree with Safewalrus here fellas, going from the "original" text, I too was amazed to read about "My goal is to travel without concern for weather. "
    This is usually a comment posted by someone that knows NOTHING about the sea.
    So forgive Safewalrus from his comments, he was commenting on the original text, and I can only agree with him.

    ALowell has now commented further, so all bets are off.
     
  9. Geoh
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    Location: Arizona

    Geoh Junior Member

    A man that does not fear the Sea will soon be drowned, for he will be going out on a day when he should not. But we, we fear the Sea, and we only be drowned now & again."

    I found this quote quite a while ago and now forget where it is from....anybody know?

    George
     
  10. ALowell
    Joined: Mar 2007
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    ALowell Junior Member

    Hello everyone. I'm back after a too-long hiatus and we all have George to thank for reminding me about my thread.

    My statement regarding "travel without regard to weather" was meant as a relative statement. I assumed all knowledgeable readers would realize that what I meant was not hurricane or gale conditions but rather the day-to-day chop/wind that prevents most boats under 30' from going out comfortably or long distances. I was unclear and that is my fault. To those of you who still think I "know nothing of the sea": this could very well be true since that too is a relative statement. However, I would like to mention that I am a USCG licensed captain (100 tons limited, soon to become unlimited). Also my absence from the forum is in part because I have been cruising aboard a 35' lobsterboat for the past two months, going to Nova Scotia via the Erie Canal, St. Lawrence, and back home along the Maine coast (I encountered lots of weather and regarded all of it).

    As concerns progress toward my future boat, I have been researching VSV boats like the "MarySlim" designed by Adrian Thompson and drawing lots of pointy boats in my spare time. The size envelope of my proposed boat has increased over the months up to 28' and seems to be getting larger by the minute. I will probably resort to making a smaller version (15' maybe?) unless I feel very confident in my predictions.

    My research thus far has lead me to the conclusion that narrowness will make up for the reduced planing efficiency of extreme deadrise. I have yet to determine if and how much ballast will be needed to keep my VSV right-side-up or if said ballast will negate efficiency too much. I'm also considering water ballast (empty while planing) and lift strakes designed for dynamic stability.

    When I refer to "efficiency" it should be noted that I am basing my approxiamate requirements on my present boat which weighs 15,000 lbs loaded and gets about 8 gph @ 15 kts. Anything significantly worse than this will be too much for my wallet and my conscience.

    ~ ALowell
     
  11. kengrome
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    kengrome Senior Member

    In this case I will suggest the boat I did not suggest earlier when your length limit was only 23 feet -- Phil Bolger's Slicer:

    http://www.duckworksmagazine.com/05/excerpts/maib/1/index.cfm

    This is a planing hull boat that bridges the troughs between the waves and gets exceptional mileage with a very small engine.

    I might also suggest one of the tunnel-stern Seabright skiffs from William Atkin. His "Shoals Runner" is the last and therefore the most refined of these boats, and it happens to be 22 feet long so it is well within your original design specs of 23 feet or less:

    http://www.boat-links.com/Atkinco/Utilities/ShoalsRunner.html
     
  12. ALowell
    Joined: Mar 2007
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    Location: Northeast, USA

    ALowell Junior Member

    "Slicer" is an amazing looking boat -- I would be proud to own one. However it says right in the description that it handles poorly in waves over 3 feet. My comparatively small 18' Eastern can handle more than that.

    Do you have any experience with Bolger's boats?

    ~ ALowell
     
  13. kengrome
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    kengrome Senior Member

    In this case I will suggest the boat I did not suggest earlier when your length limit was only 23 feet -- Phil Bolger's Slicer:

    http://www.duckworksmagazine.com/05/excerpts/maib/1/index.cfm

    This is a planing hull boat that bridges the troughs between the waves and gets exceptional mileage with a very small engine.

    I might also suggest one of the tunnel-stern Seabright skiffs from William Atkin. His "Shoals Runner" is the last and therefore the most refined of these boats, and it happens to be 22 feet long so it is well within your original design specs of 23 feet or less:

    http://www.boat-links.com/Atkinco/Utilities/ShoalsRunner.html
     
  14. kengrome
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    kengrome Senior Member

    Okay ... but I do not recall any mention of this requirement in your design brief. Maybe you can post a new design brief since you've apparently changed it quite a bit. Then we will know better what to suggest and what not to suggest.

    Not personally, but there are hundreds who have, and I suspect that many of them are subscribers to the [bolger] Yahoo group.
     

  15. ALowell
    Joined: Mar 2007
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    ALowell Junior Member

    Actually, if you've been following the thread you would remember all the controversy over my "ability to travel without regard to weather" statement that has caused me so much grief. I think this covers more than 3 ft waves, but that is a matter of perspective I suppose.

    My new design brief is as follows:

    Size: 25 to 35 feet with accomodations for one person (me) and a settee berth for an unwanted guest.

    Shape: Very narrow with extremely sharp forward sections and low forward displacement to reduce vertical acceleration in heavy sea. Ability to maintain 15 kts speed in force 5/6 conditions.

    Misc. features: Reinforced windows (with easily deployed emerg. covers), low center of gravity, possible water ballast, forward crash bulkhead, helm at pitch center (for crew comfort), propeller guarded by skeg and grounding shoe, minumum 18 in wide side decks for easy access forward, inboard handrail ("coast guard" style), aggressive non-skid decks and large rubrail and toe rail. Plus all the things I'm forgetting.

    Things I don't want: Teak and holly sole, flybridge, cupholders, bow thruster, refridgerator, swim platform, jets (or outdrives), folding cleats, bow sprit/pulpit, rod holders, anything to do with "bait", window curtains, glossy gelcoat, "sunpads", European styling.

    ~ ALowell
     
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