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    Command Boat 90
    by CB90 ๐Ÿ‡ฌ๐Ÿ‡ง ( Warrant Officer)
    ๐Ÿ“ฃ










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    2 Posts 6 Comments 28 Photos 9 Likes
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    ๐Ÿ“ Command boat 90 update
    12 days ago by CB90 ( Warrant Officer)
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    2019 have updated drives to dual brushless out-runners
    High Performance 2826 900KV 14 Poles Brushless Motor and added twin 90A ESCs the craft goes a lot better, And will still spin on its own axis.
    Added 6 ventilators to the motor compartment hatch,
    The next phase will be to increase voltage to 14.8v and reduce propeller size.
    Note gun now rotates and elevates.
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    ๐Ÿ“ Command Boat 90
    2 years ago by CB90 ( Warrant Officer)
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    Scratch built at 12th scale from pictures and profiles of the internet. The boat was originally built in Sweden a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet

    Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48')

    Complement: 3 (two officers and one engineer); Up to 21 amphibious troops with full equipment Armament: 3 ร— Browning M2HB machine guns; 1 ร— Mk 19 grenade launcher; 4 naval mines or 6 depth charges .

    The Model
    I was attracted to this boat due to its great performance and maneuverability, this was mainly due to the use of twin water jets as the main propulsion, this is a trade off with efficiency.

    So my start point was to collect as much information as possible about the boat this involved collecting pictures and profiles of the craft from various sources.
    http://www.dockstavarvet.se/products/combat-and-patrol-boats...

    Eventually I found some plans of sort :-
    http://laurell.today/boats/combat/plans.html

    My Dad was a boat builder in the days of wooden yachts, and had showed me how to make plans and frames from a line drawing. I went about this first by creating a prototype about 24 in long out of light ply. I then created full size plans of the model to be made.
    Pictures of small prototype finally painted plain green.

    The Main model
    Used my computer to print out the frames onto paper, cut them out and used them as templates for the ply ribs.

    The construction was simple chine style, with 1.5 mm ply.
    I tried to build jet drives but failed to produce a effective unit.

    So reverted to propshafts which worked out well with better control and the boat can spin on it own axis by putting one engine in reverse the other in forward and adjusting the twin rudders.

    That it for now, hope it was of some interest
    http://www.dockstavarvet.se/products/combat-and-patrol-boats/combat-boat-90-h/specification/
    ๐Ÿ”—
    http://laurell.today/boats/combat/plans.html
    ๐Ÿ”—

    plans
    paint
    patrol boat
    prop
    yacht
    model
    engine
    boat show
    wood
    build
    rudder
    pt boat
    scratch chine
    scratch
    show
    wooden
    12 scale
    12th scale
    fast patrol boat
    frames
    ribs
    scale model
    scratch build
    computer
    twin rudder
    water line
    rc boat
    propshaft
    jet unit
    jet boat
    prop shaft
    jet drive
    wooden model
    built
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    ๐Ÿ’ฌ Command Boat 90
    2 years ago by RNinMunich ( Fleet Admiral)
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    Fully crewed really looks the part ๐Ÿ‘
    Nice job, well done ๐Ÿ˜Ž

    crew
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    ๐Ÿ’ฌ Command Boat 90
    2 years ago by BigAlio ( Petty Officer 2nd Class)
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    Hi I like the boat would be interesting with jet drive.
    they are available quite cheap for the nqd jet boat from ยฃ9.01on ebay item no. 282721477302 comes with cheap brushed motor can be converted to brushless to make things interesting hope this gives you food for thought for maybe future build.
    thinking of building a deans marine PBR cannedheat and fitting it with a couple of these jet drives.

    motor
    build
    ebay
    brush
    brushless
    brushed motor
    e bay
    brushed
    jet boat
    jet drive
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    ๐Ÿ’ฌ Command Boat 90
    2 years ago by Colin H ( Captain)
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    I tried one of these but couldn't get it to reverse the boat. Possibly not got the correct set up for the jet nozzle. it pushed a 30 inch fiber glass fast patrol boat very well, might try to sort outlet to give better control. You've raised my interest again thanks, Colin.

    outlet
    patrol boat
    fiber fast patrol boat
    glass
    nozzle
    jet boat
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    ๐Ÿ’ฌ Command Boat 90
    2 years ago by BigAlio ( Petty Officer 2nd Class)
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    Hi Colin to get reverse you need to have reverse bucket fitted controlled by servo drops down over jet to reverse water flow.
    hope diagram makes it clearer

    servo
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    ๐Ÿ’ฌ Command Boat 90
    2 years ago by CB90 ( Warrant Officer)
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    The Real Boat has jet drives, but unfortunately the little 20mm ones on the NDQ boat would not move a 52in version shown, there are larger jet dives for models available from Germany but it would cost a lot more than my budget would allow.
    I did try to make some but they were unsuccessful.

    I have seen them fitted to other smaller CB90's but the crash stop looks pathetic. and jet dives are not very efficient.

    I would love to take a trip on a real one!

    I've just found a plastic kit version by Tiger

    Here's a YouTube link to an unboxing:-
    https://www.youtube.com/watch?v=Fr5xGoMjBlI
    https://www.youtube.com/watch?v=Fr5xGoMjBlI
    ๐Ÿ”—
    You Got a Package!!! Tiger Model CB90
    โ–ถ๏ธ

    pathe
    model
    boat show
    kit
    show
    jet boat
    jet drive
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    ๐Ÿ’ฌ Re: Command Boat 90
    9 days ago by Skydive130 ( Commander)
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    Very unusual subject, but instant like ability ๐Ÿ‘
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