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    7 & 10inch Cabin Cruisers
    by redpmg πŸ‡ΏπŸ‡¦ ( Commander)
    πŸ“£










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    5 Posts 24 Comments 14 Photos 37 Likes
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    πŸ“ New Parts Cut
    29 days ago by redpmg ( Commander)
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    Decided to cut windows & frames - since cabin sides & decks were too short decided to redraw and recut those too. the stringers dont give the bend required at the bow so having to glue extra pieces in - in another life would redraw the keel and fit bow pieces Aerokits style and would draw & cut chine pieces in the same manner as Freedom Song/ Midwest kits do - (thank you the late Ed Stinson) - makes for a much easier build - after this many years and still learning.............
    Also forgot you can bend balsa easily by crushing one side with your nails - so fitted the 7" chine stringers easily - but still not enough curvature - having to add more pieces to the stringers. Will post further photos once the hulls are ready for bottom planking.
    Batteries on charge to test esc on 3.6v.
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    πŸ’¬ Re: New Parts Cut
    29 days ago by Ron ( Lieutenant Commander)
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    Did you try cutting the balsa into small strips and glue diagonal? Or straight up & down at the bow. How about soaking it in water or steaming?

    I am tempted to try one of these too or make up a small sailboat as the hull is almost identical, but adds a keel and rudder.

    Ron
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    πŸ’¬ Re: New Parts Cut
    29 days ago by redpmg ( Commander)
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    Even using 2 x 3mm strips they did not bend easily - hot water soaking works but not really worth while time wise on these small models Ron . Going to plank in 2mm balsa after making ' card templates . Have to work out how to link the very small servo's used - the one for the 7" is minute to say the least
    Sailboat idea is a good one too..........
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    πŸ’¬ Re: New Parts Cut
    29 days ago by Ron ( Lieutenant Commander)
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    see:
    pocketship in the small boats monthly website

    PocketShip Particulars
    Length 14β€² 10β€³
    Beam 75β€³
    Draft, board up 16β€³
    Draft, board down 36"
    Sail area 148 sq ft

    If you reduced these in half it comes out to almost the same as your little cabin cruiser.
    https://smallboatsmonthly.com/article/pocketship/
    πŸ”—
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    πŸ“ Starting the build
    1 month ago by redpmg ( Commander)
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    A few photos of progress so far - very slow as everything else seems to take priority - spent time for instance looking for a microswitch to get someones wheelchair going again .............
    As you can see I had a helper - Willy the curious , the 1/2 outboard is a broken one (have the other parts) which will be altered to look like a small Mercury rather than an slightly oversized Evinrude Lark. Picked up two problems already with the lower deck cutouts being too large on the 10" version and the decks of both are far too short - so they will be re-cut today . Everything else seemed OK . For the 7" will be tryng a plastic tube for the shaft casing to save a little weight..............
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    πŸ’¬ Re: Starting the build
    1 month ago by Ron ( Lieutenant Commander)
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    Really coming along nicely
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    πŸ’¬ Re: Starting the build
    1 month ago by Martin555 ( Admiral)
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    Hi Red,
    That was a bit of a shock, I did not realise you were making both the 10" and the 7".

    Looking good so far.
    Well done.

    Martin555.
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    πŸ’¬ Re: Starting the build
    1 month ago by RonH ( Petty Officer 2nd Class)
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    This looks great. I like the small size and with the beam, the boat should be very stable.
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    πŸ’¬ Re: Starting the build
    1 month ago by MouldBuilder ( Captain)
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    They look to be progressing very well. Do you have two sizes of Cat as well?😁
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    πŸ’¬ Re: Starting the build
    1 month ago by marky ( Captain)
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    land of the giants😏
    Cheers markyπŸ‘
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    πŸ’¬ Re: Starting the build
    30 days ago by redpmg ( Commander)
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    MB - there appears to be a 2nd cat here - somewhat smaller as you can see
    Martin - decided i would try it anyway - have a tiny motor & prop - not sure what to use as a battery !
    To All - thanks for the kind comments
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    πŸ’¬ Re: Starting the build
    30 days ago by RNinMunich ( Fleet Admiral)
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    Aha! Willy the 'more than curious' had a bike did he!?πŸ˜‰
    😎
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    πŸ’¬ Re: Starting the build
    30 days ago by Joe727 ( Lieutenant)
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    Redpmg,
    Thanks for the great photos and posts, well done. Your comment on undecided about the battery is the problem I faced on my little river tug build. I ended up designing the hull dimensions on the weight of 4 AAA batteries. It would be nice to find a smaller battery to do a smaller boat.

    Keep up the good work. πŸ‘πŸ‘
    Joe😎
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    πŸ’¬ Re: Starting the build
    30 days ago by Martin555 ( Admiral)
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    The Battery size is the problem with the micro boats.
    Perhaps we should of stated that the batteries had to be 4 x AA as the standard.

    Martin555.
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    πŸ’¬ Re: Starting the build
    30 days ago by Graham93 ( Sub-Lieutenant)
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    There are smaller batteries available. I had to reduce the battery in my micro tug from 4x AAA to 4 x 2/3 AAA. Not a lot of capacity 400mAh, but then you don't need a lot for these micro boats. After all, how long are you going to sail them for in a bath πŸ˜‚πŸ€£

    Graham93
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    πŸ’¬ Re: Starting the build
    30 days ago by redpmg ( Commander)
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    Hi Graham - different size batteries are difficult to obtain here - there is one specialist battery shop in Cape Town that might be able to help - don't even know if they are open again yet - and in any event it would be almost impossible to get them delivered until lockdown eases a bit .
    Will try 3x AAA as I have an old Hitec 27mhz miniature receiver that works on 3.6v and have to hope the Robbe 2amp ESC does too . Have a early Action Pico 68 ESC complete with motor but says 4.8v . Will have to check with Dave M before trying it. Thought about using a helicopter motor - not sure it would work - dont think the little lipo would last long . Will have to test & see with sons old broken one - but a bit ham fisted with electronics..............
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    πŸ’¬ Re: Starting the build
    30 days ago by Graham93 ( Sub-Lieutenant)
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    Hi Red,

    Shame about the supply problems. I sourced my 2/3 AAA battery from Component Shop here in the UK as they are still open, and the postal service is still running, if a little slower than usual.

    Another thought I had when building my micro tug was to use a voltage step up converter to allow the use of a smaller battery. This should allow the use of, for example, a 2 cell battery to step up the voltage to 4.8v and hence save weight. The one pictured has a minimum input voltage of only 2v and costs less than Β£2. Of course, 'you don't get owt for nowt' so doubling the output voltage using one of these will (more than) double the current drawn from the battery hence reducing the battery duration.

    Graham93
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    πŸ“ Laser Cutting
    1 month ago by redpmg ( Commander)
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    To answer - yes we do have a laser (for commercial reasons which I am allowed to use by the better half for boats) - makes cutting out very much easier - but there is a lot of work drawing up the input - and trying to ensure errors on the original plan are corrected - There were two plans originally from a now defunct magazine - published many years ago. 14" one has a straight deck - the other 16" one has a curved deck (lengthwise - not talking about cross camber) . I would gladly pass on copies of what I have but would first like to ensure they are corrected properly . When designing or redrawing a plan usually make at least one prototype to catch any errors - scratching for components but will try to get on with the build tomorrow.
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    πŸ’¬ Re: Laser Cutting
    1 month ago by Skydive130 ( Lieutenant Commander)
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    Oh the dream of owning a laser cutter! I have tape, glue, access to a photocopier, various cutting tools and hands, that's my laser cutter πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚
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    πŸ’¬ Re: Laser Cutting
    1 month ago by redpmg ( Commander)
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    Problem is good ones size, power & software wise are very expensive and unless one is very wealthy cost is simply not justified for hobby use only. There are small desktop ones made in Seattle in the US which are quite good but the biggest will be about A3 size cutting bed and quite low powered. The cheap Chinese ones are very dangerous - and very under powered - software is puerile - and would probably only cut balsa or (surprisingly ) ply up to 4mm. Not Perspex or any other hard materials without multiple cuts which lead to inaccuracy/burning.
    Our current one is 900x600mm nominal but has a removeable panel front & rear so you can cut any length you want as long as its not wider than 845mm - 890 if its less than 12mm thick. There are larger ones available - but would take up most of the space in a large single garage - and all of it in the one we had in Bournemouth. Even my Midget had a hard time squeezing in
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    πŸ“ This was the plan
    1 month ago by redpmg ( Commander)
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    posted the plan on lockdown challenge a while ago - plus the parts drawings
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    πŸ’¬ Re: This was the plan
    1 month ago by Skydive130 ( Lieutenant Commander)
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    Can you please send me a link to the plan, love this little beauty!
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    πŸ’¬ Re: This was the plan
    1 month ago by RNinMunich ( Fleet Admiral)
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    Haven't you twigged it yet Sky?
    THAT IS the planπŸ˜‰
    Unless you want the Corel Draw versions!
    I note that red has updated the parts drwgπŸ‘
    Cheers, Doug😎
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    πŸ“ 7 & 10inch Cabin Cruisers
    1 month ago by redpmg ( Commander)
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    Got around to cutting the parts today - photos not that good - camera seems to be loosing its edge. Getting a bit old I suppose.....Like its owner

    Suspect the little 'un will be ok to float in the bath - don't thinks there's enough displacement despite being a tubby hull
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    πŸ’¬ Re: 7 & 10inch Cabin Cruisers
    1 month ago by Martin555 ( Admiral)
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    Hi Red,
    I will be following this little build.
    Good luck.

    Martin555.
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    πŸ’¬ Re: 7 & 10inch Cabin Cruisers
    1 month ago by Dibdawg ( Petty Officer 2nd Class)
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    looking forward to updates!
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    πŸ’¬ Re: 7 & 10inch Cabin Cruisers
    1 month ago by Rookysailor ( Commander)
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    Nice bit of plan work Red,πŸ‘ How did you get the plan pieces onto the wood, have you a laser cutter?

    Cheers, Pete
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    πŸ’¬ Re: 7 & 10inch Cabin Cruisers
    1 month ago by RonH ( Petty Officer 2nd Class)
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    This is going to look great, keep us posted!
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    πŸ’¬ Re: 7 & 10inch Cabin Cruisers
    1 month ago by Skydive130 ( Lieutenant Commander)
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    Quite fancy this down the line once other projects completed, shall follow with interest. One question if I may, what wood and thickness are you using and how did you transfer outlines to the wood, looks like a kit! πŸ‘πŸ‘πŸ‘
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