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    Russian K100D waterjet work boat project
    by jbkiwi ๐Ÿ‡ณ๐Ÿ‡ฟ ( Fleet Admiral)
    ๐Ÿ“ฃ










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    ๐Ÿ“ Russian K100D waterjet work boat project
    1 day ago by jbkiwi ( Fleet Admiral)
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    Started fitting the servos, also sorting out the programming on the 9X TX, Unfortunately it's not clever enough to mix 2 Aux channels with the L&R pump outlets for single stick steering in reverse (like flaperons) I've worked it so 2 pots operate the 2 reverse nozzles independently, flap switch operates fwd flap, rudders on aileron ch and normal throttle ch.

    I tried mixing the 2 rev nozzles (using the pots), with the rudder channel - switching the mixing on and off with the 3 pos sw on pos 1, but it will only operate one servo on one aux channel. You can't add pos 2 on the sw for both servos,- probably has to be on another channel. I can get both servos operating together for reverse, but it's not much use for steering.

    Would have been nice to have it on one stick but it would need a non centering rudder stick, then you could add flaperons, (switched on with the 3 pos). My 9XR would probably do it all, but that's set up for planes.

    I've ordered a 26mm jet unit to modify,- hopefully I can bolt it straight onto the front of the box.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    18 hours ago by jbkiwi ( Fleet Admiral)
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    Hi Steve, thanks for the suggestion. My 9x is an early one and hasn't got a data port (just a trainer plug). I think if you want to do anything with these, you have to use the pads on the board. Early on, a number of people on the HK forums, tried downloading upgrades etc and killed their TXs, so I'm not game to give it a go. You have to know what you are doing with that. There were instructions with pics on the HK site, but it's all gone now. It's not as nice using the pots, but for the amount the model will be used, it will have to do for now, (not even sure if the jet will work yet๐Ÿ˜)

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    23 hours ago by stevedownunder ( Commander)
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    Hi JB,

    Have you got Open TX Companion this is a great free program that allows you to program your 9X and other TXs on a computer then download the program onto the 9X. Maybe that might help.

    Cheers,
    Stephen.
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    ๐Ÿ“ Russian K100D waterjet work boat project
    3 days ago by jbkiwi ( Fleet Admiral)
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    A diagram showing how this system works (for anyone scratching their heads )๐Ÿ˜ Three flaps,- 4 operations

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    2 days ago by Len ( Leading Seaman)
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    Thanks. This helps.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    2 days ago by jbkiwi ( Fleet Admiral)
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    Hi Steve, thought I'd do a diagram, as when you say that 3 flaps perform 4 functions in a jet unit, it's a bit hard to envisage. Russians do seem to have a knack for making unusual machines ๐Ÿ˜ Beside a modern jet unit, they look pretty agricultural, but they seem to work ok.

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    3 days ago by stevedownunder ( Commander)
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    Lovely diagram JB,

    Defiantly quite a bit involved for this system.
    Certainly more complex than a bucket arraignment.

    Cheers,
    Stephen.
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    ๐Ÿ“ Russian K100D waterjet work boat project
    4 days ago by jbkiwi ( Fleet Admiral)
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    Finished the flaps, -except for a few bits of tube for spacers to stop them lifting up in the box) All seem quite airtight now with the thin sponge seals, so will get another test soon. Looking a lot better than the MK 1.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    3 days ago by jbkiwi ( Fleet Admiral)
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    Hi Mike, I am going to glue stops behind the flaps to stop the flaps possibly being pushed back at the end of the servo travel. This might only be necessary with the reverse flaps, although there will be no water going past them to deliver any force, (water taking the path of least resistance and the end of the box being full of water) but if I make the fwd flap open a few degrees past 90, (a bit better for flow) I'll add one behind that as well.

    JB.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    4 days ago by mturpin013 ( Vice Admiral)
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    Thats looking a great improvement JB
    only one observation - when water is flowing through each pipe in turn there may be excessive force trying to close the flap and maybe putting excess pressure on the servo - just a thought, the flap needs to be at exactly 90 degrees to the pipe when open ?
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    ๐Ÿ“ Russian K100D waterjet work boat project
    5 days ago by jbkiwi ( Fleet Admiral)
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    MK 2 version started now which should be an improvement. Has 3 internal flaps, rather than them being outside on the bends, which should make the shafts easier to seal as there are only 3 shaft exit holes. Might be able to use a smaller box, depending on where the screw pillars are located, as they could interfere with the shaft placement. Jet unit will hopefully be bolted to the front of the box. This version is narrower than the MK 1 which gives room to play with the reverse outlets.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    4 days ago by jbkiwi ( Fleet Admiral)
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    Hi Graham, definitely will need a bit of pressure, but I'll be reducing the size of the reverse outlets to give it some help. The 26mm jets put out a fair bit of pressure once modified with a 3 blade cut down racing prop, minimum blade clearance and revised intake with vertical bars like the Hartley one, so with luck it will get things moving.

    I'll have to wait till I get a jet unit before I can play with pipe sizes, and I'll probably be making a dummy hull to test things on first. Re the box,- the electronics shop has lots of different types (including alloy), but the waterproof ones they have are a lot larger (and expensive!) I thought of the waterproof cell phone boxes with clip on lids (for out in the boat etc) but they are polycarbonate and very heavy. Bound to be a better box, but finding who'd sell them is the hard part. As long as this one will hold the pressure with a silicone seal, (I'll glue a wider rim inside for better coverage) it should be ok for testing/proving the idea (or not ) at least.

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    4 days ago by Graham93 ( Rear Admiral)
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    Hi JB,

    I think it is going to need a lot of water pressure to get a sufficient flow from the reverse outlets.

    For sealing the box, try to find an IP66 rated version. These have a built in sealing gasket for the lid. It might be difficult to find one small enough.

    Graham93
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    5 days ago by jbkiwi ( Fleet Admiral)
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    Hi Trev, I'd probably just use a silicone gasket, but I need to glue in some center screw lugs to tighten it down evenly. Once sorted, it shouldn't need opening that often. Might be able to mould a silicone gasket in the lid, as the sides are really too thin for an o-ring.

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    5 days ago by pressonreguardless ( Lieutenant Commander)
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    Hi JB,
    Could you use 'O' rings sandwiched between two lids?
    Trev
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    ๐Ÿ“ Russian K100D waterjet work boat project
    7 days ago by jbkiwi ( Fleet Admiral)
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    Just having a play with an idea for a model of a early Russian KS 100D general purpose work boat. These were used for river work towing logs etc in shallow rivers . The water jet is unusual, as it has a rear shute with twin rudder type deflectors, and rear hull side ports for reverse (independent controls for each port). Someone on the site mentioned a steam powered water pump driven ship from the 1800s ? a while back on the site which used a similar principal.

    The boats were made by the Yaroslavl shipyard, and were very common in the late 50s till (I think) the 70s. Not much info on them but a few guys have rebuilt old ones for pleasure boats. They have a speed of around 16-18knts and used a Yamz 170hp V8 diesel. I've contacted (YT) a guy who has rebuilt one of these boats, and he has fitted the V6 version of this engine.

    My attempt is not like the original, as there is no info on the complicated internal deflector system, so I've gone with the next best thing using modified electrical conduit fittings with flap valves. Seems to work ok, but not sealed yet so leaks like a sieve. I'd use a 26mm jet unit for the pump in front of the unit. I'll have to reduce the diameter of the side outlets to get more force behind the jets. Might have to fit the unit in a waterproof tray with a bilge pump. as I think, even though it will be sealed, it will still leak slightly round the 3 shafts.

    https://youtu.be/7Lgb7hH6ln8
    https://www.youtube.com/watch?v=altwiMdZlIA
    https://www.youtube.com/watch?v=yWSI8moMeZg&t=33s
    https://www.youtube.com/watch?v=87PsJVdPNhE
    https://www.youtube.com/watch?v=CQ3U7XmeG1A (similar later model showing manoeuvrability)
    https://www.youtube.com/watch?v=hblw4_44FB8

    The big lid on the jet is for clearing weed or similar which might get into the unit.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    5 days ago by jbkiwi ( Fleet Admiral)
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    Hi Mike, problem is that you need to shift a large volume of water and need either fwd or reverse flows, with reverse using both pipes at once or side to side. The Russian jet does this with a set of flaps inside a sort of closed Y shaped box- pic 6 (No 2 in the diagram,-above the 28 are the rear rudders/flow directors, No 1 is the rev ducts)-pic 8, all individually moved with an air ram system, (a lot of Russian stuff is pneumatically operated due to the freezing conditions in a lot of places, a good example is a Yak 52 which has air everything,-start, flaps, brakes etc)

    Quite a complex device,- a Hamilton jet or similar is far simpler and much more compact.

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    5 days ago by mturpin013 ( Vice Admiral)
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    I'm sure she would JB ๐Ÿ˜Š
    However very interesting project I look forward to your solutions
    How about using the rotating ball system as in a domestic 15/20mm shut/off valve
    Im sure you can get varying sizes of plastic balls these could be drilled out and then at 90 degrees a spindle through to each side of your pipe to rotate it with the servo.


    https://www.ebay.co.uk/itm/265298494297?hash=item3dc505c359:...
    https://www.ebay.co.uk/itm/265298494297?hash=item3dc505c359:g:ZUIAAOSw-U1hMd1O&amdata=enc%3AAQAHAAAA8G9Emklbh2%2FbGdt3hdoEfBaRltiJPlUypZzRQ0ZNCEyjcQsdZIZFGEvzLM8nnnVfBSKG2K17xp4V1PYGO5C05cR0H%2F3HZp1eGnOXGOSphlUh83NnraR8HxpVxbNiwPb5N3FtnHvMkZG3Dojc3vWYnklO3gSnnFcD3DwFNEfM0tv8RrpBk%2FT6g0jbNlLNYAk%2BiGhwJxXXdKzd%2F5ATPQQbcr91YdTYc58OhsVaU2srbEvuVOeI6gyB8DBOU4JQIXwwVHdexLJi%2FFg%2Bw8izmV6pUiJ5gPkvA7SPbZwb9P7hEFDUBtz2pvfanhhTVdc%2BO5xHTQ%3D%3D%7Ctkp%3ABFBMwp-H7Opg
    ๐Ÿ”—
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    5 days ago by jbkiwi ( Fleet Admiral)
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    Sorry Mike, made them before she moved on. Have made improved MK 2 now anyhow, so sensitivity problem solved ๐Ÿ˜. (you could have called it the Queens' contribution to modelling,- she might have even been amused.)

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    6 days ago by Graham93 ( Rear Admiral)
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    Hi JB,

    Looking forward to this build. Iโ€™ll be interested to see how you solve the leakage problem ๐Ÿ’ฆ
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    6 days ago by mturpin013 ( Vice Admiral)
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    Really ! Not very thoughtful using the Queens head, bearing in mind the present circumstances please replace with a piece of brass sheet. come on JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    6 days ago by pressonreguardless ( Lieutenant Commander)
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    Hi JB,
    I like to work on more than one project at a time.
    It breaks it up for me.
    Trev
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    7 days ago by stevedownunder ( Commander)
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    Hi JB,
    Interesting project.

    Cheers,
    Stephen.
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    7 days ago by jbkiwi ( Fleet Admiral)
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    Hi Trev, hopefully it will do the trick, but will need some refining. Not too worried about speed, just getting the the jet action working well. Just something to do alongside the Stiletto when I have time.

    JB
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    ๐Ÿ’ฌ Re: Russian K100D waterjet work boat project
    7 days ago by pressonreguardless ( Lieutenant Commander)
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    Looks like a great project, JB๐Ÿ˜Ž๐Ÿ˜Ž
    And you already have the propulsion system worked out๐Ÿ‘๐Ÿ‘๐Ÿ‘
    Looking forward to the build!!
    Trev
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