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.

A diagram showing how this system works (for anyone scratching their heads )😁 Three flaps,- 4 operations

JB

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.

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.

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.