The game is afoot

Discussion in 'Boatbuilding' started by Boston, Apr 20, 2011.

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  1. Boston

    Boston Previous Member

    just working a few things out over here
    hull speed should be something like 7 knots
    planing speed should be something like 2.5 times 29^0.5 or 13.45 knots
    so the boat should run level at say 7 knots or slower and level out again at about 13 knots and faster. Means if I want to run at planing speed according to the engine and prop calculator I have I'll need 50 hp to get past 13 knots on flat water.

    Hmmmm
    not sure I want that much engine in this thing.
    its more of a cruiser/fishing relax boat
     
  2. Boston

    Boston Previous Member

    Picked up a vacuum pump today for bagging the cedar ply, still need some hoses and a cord for the motor. Made some benches and milled out some stock for the project that actually makes me money. Need money for boat :D

    Found a new crate engine KUBOTA V1305 ~40 hp at a pretty reasonable price and am waiting to see how high it goes ( ebay )
    its about 24 x 24 x 16 and weighs about 300 lbs, continuous load of 30 hp, max 40, I might make plane with it but i"m not that concerned about it as long as I can fight a current and some wind and waves and still get somewhere I'm content.

    crack of dawn and its raining again so I'm back in the shop instead of out on the job site, :mad: weather delays cut into my boat money. Temps tonight might not be high enough to allow me to glue up any ply today, aaarrrggg.

    My new benches are long enough to lay out the Apron and keel on so maybe I'll work on that while I wait for a warmer day to start the ply.

    Gotta pick up some lumber as well but not happening in the rain :(
    just enough at these ludicrous local prices to keep me amused till I can order a truck from the mill.

    cheers
    B
     
  3. viking north
    Joined: Dec 2010
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    Location: Newfoundland & Nova Scotia

    viking north VINLAND

    You're not alone with the rain, it's been raining here for three weeks steady, can't get a half decent day to fasten my keel mold bulkheads to the hull (which is outside until it's keel/ballast is installed then will be inverted upright and brought into the shop). Can't make any boat money either as the rain is shutting down the last section on a siding/reno job. Funny all that water doesn't wash away the Honey-do list though. Sounds like you're still having fun with the boat, thats important, following along on the sidelines---Geo.
     
  4. Boston

    Boston Previous Member

    if it rained three weeks in a row here folks would think it was the end of the world. Still to humid and cold to risk gluing anything up. I've got the vacuum pump all ready to go, 1/2 hp 220v ( had to play with some wiring on that one ) with a big centrifugal fan. feels like it would suck the chrome off a Harley. Am hoping the hoses off the shop vac are rigid enough to do the job and I got some 6mill plastic and tape just waiting to try a panel and see how it goes. Might sandwich it all between some homasote just to even out the pressure and provide a relief channel for the atmosphere.

    OH well nothing much happening again today :(
     
  5. cthippo
    Joined: Sep 2010
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    Location: Bellingham WA

    cthippo Senior Member

    Hey Bos, what are you using for Buttocks spacing? I tried 9, 18, and 27" off the centerline and the results don't make any sense. :confused:
     
  6. Boston

    Boston Previous Member

    I used 9" increments, worked out fine but I did find a few that were a little off. I think that the keel I used to mark the floor might have been a bit fat and so my lines came out sloppy which is why I double checked everything. I fudged a bit this way and a bit that and used a pencil when I checked it rather than the keel. I developed the areas forward above the chine and fared/fudged the rest. I might have mentioned earlier there were a few things on the table that were off by an eighth or so.

    Rain really screwed up my schedule this week, now I'm behind on both the boat and the project that pays for it. Not what I was hoping for but I've started the build so all is good.
     
  7. cthippo
    Joined: Sep 2010
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    Location: Bellingham WA

    cthippo Senior Member

    OK, I think I have this figured out. Can you give me your station spacings? I just divided them evenly, but it appears that was the wrong approach.
     
  8. Lurvio
    Joined: Jul 2009
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    Location: Mid of Finland

    Lurvio Mad scientist

    I used 30'' on St.9 to St.10, 36'' on middle frames and St.0 to St.1 was a bit over 28''. All these measurements are on page 8 of this thread.

    Lurvio
     
    Last edited: May 13, 2011
  9. Boston

    Boston Previous Member

    If I remember correctly on the full size drawing I went with 2' 5 and 1/2 cause it added up to exactly the 28' 11" length listed in the booklet, once I added all the 36" stations in. I think, its early and I haven't had any coffee yet. going to the shop now and if its warm enough I'm going to bag up my first bulkhead and see how it goes. That and I gotta get some stuff done on my other project as well.

    cheers
    B
     
  10. cthippo
    Joined: Sep 2010
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    Location: Bellingham WA

    cthippo Senior Member

    Not that it matters at this point, but I think i finally got a useful model finished. If nothing else (and it probably is nothing else) it's been a great learning experience! I understand the process a lot better than I did when I started.

    I still can't make the buttocks points make any sense, so I just ignored them :p

    [​IMG]
     

    Attached Files:

  11. Boston

    Boston Previous Member

    Got the first bulkhead bagged up and drying now, not so sure that TB-3 is going to dry all that well under a bag tho. Will have to see what happens in the morning. Left the pump running for the night. I might end up having to make a press, not sure.

    The buts worked out fine, as a mater of fact I primarily used them to develop the sections and then checked those against the waterlines. Did some fudging on both but since I drew it like the original rather than separate sections each on its own template it was easy to see any deviations that might cause issues down the road.

    One thing I'm noticing about the drawing your presenting tho is that there isn't a set back for the stem body transition. I came back something like 2 1/2 inches maybe 2 3/4 I cant remember but there is a set back there that might be whats screwing up your dimensions
     
  12. ancient kayaker
    Joined: Aug 2006
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    Location: Alliston, Ontario, Canada

    ancient kayaker aka Terry Haines

    Titebond III setting is initialized by moisture being drawn from the adhesive into the wood, it doesn't need exposure to the air AFAIK.
     
  13. Boston

    Boston Previous Member

    I was a little spooked when I gave it the typical 30 minutes pulled the bag off it and it wasn't even remotely dry. Its been under the bag now for about 18 hrs so maybe I'll give it another couple ( time to go pick up some more tape and get some breakfast ) and see how it turned out. If all is good then I'll do another one and see about finding some more materials.

    Maybe I'll start working on my steaming rig so I can practice bending up some pretzels or something while I wait for stuff to dry.

    Cheers and thanks for the tip
    B
     
  14. Boston

    Boston Previous Member

    ok the first piece still under the bag but just after I disconnected the vacuum pump

    [​IMG]

    and just out but still need to dry for a while.

    [​IMG]

    once its dry I'll begin some testing with the scraps, this one is sized for the first station, so I'll have some drops to play with and hopefully if everything is ok I can continue the process.

    one thing I don't like already is all the glue that seeps out onto the surface of the material, its going to be a pain in the *** to sand off. Cedar is soft stuff and I want a nice flat finish of clear unstained wood. The bagging part went well enough but I've still got to check for gaps and voids, strength as well as try and get a nice smooth finish. I left a bit of material on ( 3/4 total thickness rough ) so if I"m careful I should be able to mill it down to the 5/8 specified and get past the glue staining. Its cold and rainy today ( under 50° F ) so I'm not going to glue up the next piece.

    cheers
    B

    ps
    I did have a chance to do an alarm test on the warehouse today though
    works like a charm
    cops were there in no time

    reminder
    get an alarm code from the owner
     

  15. Boston

    Boston Previous Member

    42° F today, nothing much happening

    who's got a good list of epoxy suppliers in the Denver area ?
    I want to put two panels together one titebond the other epoxy and see how they compare
     
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