How will she plane???

Discussion in 'Powerboats' started by Lynn Taylor, Aug 29, 2009.

  1. Lynn Taylor
    Joined: Aug 2009
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    Location: Senatobia, Mississippi

    Lynn Taylor Junior Member

    Point taken. Bluejacket is high on my short list. I already have the plans. Perhaps a Bluejacket/Caballero hybrid will result. It would certainly dispell any fears regarding planing and slow cruising speed. Thanks for the suggestion. Lynn
     
  2. Commuter Boats
    Joined: Oct 2006
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    Location: Southeast Alaska

    Commuter Boats Commuter Boats

    And you previously stated "I was also wondering about increasing the beam about 6 inches."
    Blue jacket is a beautiful boat with outstanding performance which is largely due to its lean lines and light displacement. Developing a "Bluejacket/Caballero hybrid " would not be fair to either and if the volume of a given design is not adequate for your purposes, spreading the stations out for a little for more length is safer than adding beam.
    Gerald
     
  3. Lynn Taylor
    Joined: Aug 2009
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    Lynn Taylor Junior Member

    Bluejacket is indeed a beautiful boat. It certainly wasn't my intention to degrade or insult either design. I love both. As has been debated here, there is no perfect design, so we must seek to maximize those features of function and design which appeal to us the most on an individual basis, just as Mr. Lathrop was doing when he designed his boat. I am in that process, and that's why I sought info here. I may very well end up building Bluejacket as designed, but it's fun weighing other options, isn't it. Thanks for your comments. Lynn
     
  4. Commuter Boats
    Joined: Oct 2006
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    Location: Southeast Alaska

    Commuter Boats Commuter Boats

    In 1960, 61 my father built a boat quite similar to Caballero (22') and ran the biggest outboard engines there were available, something around 55 hp just off center and an 18 hp which was often ran simultaneously when the boat was heavy. We had a ball and logged a lot of miles in the less than friendly waters of Southeast Alaska, I think the design has a lot to be said for it and building it with modern materials and a modern high thrust outboard would make a lot of sense for the type of boating you've suggested.
    My comment seemed to have put you on the defense and I'm sorry, it wasn't my intention.
    I completely understand the desire to pursue the optimum design for your anticipated uses as I too was unable to find exactly what I wanted in the work of others.
    As a competent mechanic in several fields I chose to draw my own lines and with full knowledge of the risks involved went forward with construction. To date, I've drawn close to 20 boats and built more than half a dozen, most along a similar theme and I've gotten away with it. I guess I consider myself lucky in that I have produced boats that either I could be proud of for the learning experience they provided or boats that have performed well.
    I would caution that dabbling in Naval architecture without proper education should be viewed as a high risk endeavor for reasons of safety and financial responsibility, there's been as many or more amateur attempts aborted as has been successful at any level.
    I hope that you find a proven design that will work for you or you enlist the services of a professional with a proven track record unless of course you have disposable time and money to invest in a large project that may be fruitless.
    I hope that I haven't insulted you by underestimating your training, if that's the case I owe you another apology. :(
    Regardless of what your choices are, I'm sure that you will receive a wealth of information from the members of this forum.
    Good luck , Gerald
     
  5. Lynn Taylor
    Joined: Aug 2009
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    Lynn Taylor Junior Member

    Gerald, No you haven't underestimated my training at all, as I have none, other than looking at internet sites showing boat construction for years. Sorry if I sounded too defensive, and no apologies are necessary. I will heed your advise because my time and money are precious to me. So, if I choose to alter a plan to any extent, I will get sound advice from a professional. Whatever I choose, it needs to be soon since retirement is less than four years away. Thanks for your concerns and advice. Lynn
     
  6. Calico Jack
    Joined: Jun 2010
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    Location: uk

    Calico Jack New Member

    Wow, I found these plans at the same site as Lynn and decided to look further, typed the name into google and found this thread, no i've never built a full sized boat before so have been reading thro the forums with great interest.

    I'm a 44 yr old CNC grinder/turner/miller Aerospace, F1 bits n bobs bla bla bla, so complex drawings are second nature and I have machined many boat parts over the years.

    I've started a 19inch model (1 inch to 1 foot), I'm using mainly Balsa and thin model aircraft ply coz I having lots left around due to another interest....
    [​IMG]
    I'm pretty OCD when I go at things and really hope to find a home in the forum, if the mods ok it and point me to the correct forum I'll post the foto's of the model build as it comes along before I attempt the full size project.

    Kind Regards, Calico Jack.
     
  7. Lynn Taylor
    Joined: Aug 2009
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    Lynn Taylor Junior Member

    Jack, I would really like to see the photos of your model. If they are posted elsewhere, please post a link here. Thanks, Lynn
     
  8. Calico Jack
    Joined: Jun 2010
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    Location: uk

    Calico Jack New Member

    Hi Lynn, I'm really glad you posted, If its ok with the mods I'll put the foto's on your thread here, as I said above the google search leads here so that makes sense for anyone else searching, cant wait to crack on with it:cool:
     
  9. apex1

    apex1 Guest

    Go ahead,

    we loose nothing, but may earn.............

    Regards
    Richard
     
  10. Jeff
    Joined: Jun 2001
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    Jeff Moderator

    Look forward to seeing some photographs of the project!
     
  11. Easy Rider
    Joined: Oct 2009
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    Easy Rider Senior Member

    Due to my advanced age I remember outboard cruisers w only 10hp. I wish I knew how big that boat is ..can't quite see. These boats are lighter than the plastic boats in recent years. The deadrise and warp on this boat is (I think) fine. I have a 1953 Motor Boating magazine an in it is an add for the Evinrude "Big Twin" ..25hp. On the back cover there is an add for Chris Craft kit boats and one pictured (18') shows her planing at about 13 knots with (I'm nearly positive) a "Big Twin" and one man and two women aboard. Mostly due to their light weight these older boats planed at much lower speeds. I have a newer 18' outboard that is slightly under powered w 60hp and does not really plane till it gets to nearly 20 knots. Also the old outboards were rated (power) at the crankshaft (not the prop) so a 25hp engine of today may have a bit more power. Lynn, since you have a soft spot for older boats you should see atkinboatplans.com. There is an Atkin Yahoo Group site as well. I have the Atkin site on my bookmarks and frequently browse.

    Easy Rider
     
  12. Easy Rider
    Joined: Oct 2009
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    Location: NW Washington State USA

    Easy Rider Senior Member

    Lynn,
    I've thought about this more and:

    1. I actually think the engine on the CC 18' OB cruiser is 10hp. They made their own OB and as I recall they never showed any other make of OB in their adds. The speed in the picture could be as low as 10mph ..but planing.

    2. I looked in the Atkin site and found an OB cruiser 22' X 8' that is designed for the "Big Twin" of 25hp and design speed is specified as "17-18mph". The boat is'nt as good looking as yours but it sounds like your'e a modifier (like me) and I think all it needs is a sheer line change. I think he made the sheer line high to make the cabin look lower. I had a 17' plywood Bryant OB cruiser w a 35hp Johnson and cruised at speeds up to 20. I think the designer of your boat is to be believed. Unless your'e going to run the boat w more than 2 people regularly think 30hp 3cyl. Otherwise 40.

    Easy
     
  13. tunnels

    tunnels Previous Member

    Typical of a hull of that era Its a smooth water boat ! get into any kind of lumpy water and you will be throttling back to a slow speed .
    Dead rise needs to be increased to 15 degrees plus ,minimum 18 is better and take some of the flatness out of the area close to the keel !. The keel needs to go and replace it with a pad starting near the aft end going forward to about 40% the length of the hull to the back then disapating . Your thought of a 70 hp is where i would be starting for sure .
    I have a older boat 14 foot and its close to the same shape that you have but the rounded flatish area of the keel is a killer and makes for a very hard riding pounding hull so build it strong !!.
    I have a glass hull and have found a way of changing the bottom with a little effort plus adding a couple of lifting strakes to get it up on the plane quicker .
    The power trims on newer outboards are far better than the older motors, most never even had trim control just play with the pin and adjust till you got it somewhere near it should be . So rack the transom a little more Than whats on the plans . :p
     
  14. Johneng
    Joined: Mar 2018
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    Location: Melbourne

    Johneng New Member

    Hi Lynn

    I am also interested in Caballero. I found a 1966 evinrude 33 that I have restored the next step is build the boat. Did you build her?
     

  15. PAR
    Joined: Nov 2003
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    PAR Yacht Designer/Builder

    This is quite an old thread, but as some have described, this is a pre "63 series" hull form and not as well suited, compaired to most designed since. Aesthetics can be changed, but the hull form, though tolerable, is at quite a disadvantage (again) compaired to more modern hulls. In this size range there are hundreds of much better shapes (hull forms) for your Evinrude. Lastly, think a light boat as 33 HP isn't much, especially if you add cabins, berths, lots more deadrise, etc.
     
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