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>> Home > Tags > system

u boat by Yax Petty Officer   Posted: 3 hours ago
[Score: 6/10] 72" u boat Capable of 3mph and a runtime of 30mins Twin Propellors (3 Blade 25mm) Direct Drive to a rewound 540s (3 Blade) Powered by NiCad (12v) 4Amp/h Batteries Controlled Through self made ESC - Comments: Built from a Darnell kit modified bouyancy bag dive system under going restoration.

perkasa by Yax Petty Officer   Posted: 3 hours ago
[Score: 8/10] 49" perkasa Capable of 8mph and a runtime of 60mins Twin Propellors (3 Blade 45mm) Direct Drive to a mfa marlin (3 Blade) Powered by NiCad (12v) 8Amp/h Batteries Controlled Through self made ESC - Comments: Glass fibre hull, rotating gun turret with simulated muzzle flash and gunfire sound,rotating radar antenna with simulated radar screen,working lights,rudder system linked to motors via micro switch assy allowing boat to spin on its axis. Constructed many years ago been in storage over 12 years about to make its comeback.

Counter Rotating Props by RNinMunich Sub-Lieutenant   Posted: 6 days ago
If they're turning inwards they (or better the water flow) 'meet' above the shafts, conversely: outwards = below the shafts where it disperses more easily, and probably also mostly below the rudder 🤔 Of course the hull form at the stern plays a major role. Which is why most modern fast naval vessels have a relatively flat hull at the stern if the only have one rudder. (Spent the last 31 years designing integrated COMMS systems for naval ships so have seen several such plans and GAs and many ships during the build.) With two rudders (1 per shaft) it's different. Classic example RN vs KM 1935/36 destroyers in WW2: RN 2 shafts 1 rudder; KM 2 shafts and 2 rudders. Giving them much better rudder response & manoeuvrability. Your comment re Contra is spot on 😉 Cheers from Munich.

The servo mount. by robbob Fleet Admiral!   Posted: 10 days ago
Hi Paul. I have ordered some ball joints from CMB so I'll try one out on the servo arm anyway and leave the clevis and adjuster on the tiller to see if it does the job. My radio is a Turnigy TGY-i6 from Hobbyking. I think it has the features you mention but I'm definitely a newbie to digital radio systems so this is all new territory for me. Thanks. Rob.

HMS Triumph by reilly4 Sub-Lieutenant   Posted: 10 days ago
HMS Triumph - Trafalgar Class Submarine at Albert Park Lake, Melbourne. There is a previous post with this submarine. It is scratch built and uses Engel piston tanks as its diving system. It has been in operation over 30 years. This is the first time it has carried a camera.

Battery problems by Patto Chief Petty Officer   Posted: 10 days ago
G/Day All Thanks for all of your advice. I have a 2 blade 40mm prop and the shaft is running free. i originally running a Johnson brushed motor with no problems with power except it and the esc i had got extremely hot. i could not find a water cooled brush motor so that is why I got the brush less motor. It is very hard to get model boat parts in Australia. Maybe it might be easier to put the old motor back in, i have now got a water pump so i maybe able to make a cooling system. Cheers Allan

Guestbook Post by captaindodo Petty Officer   Posted: 11 days ago
Hi, I have kept safely and replaced the old IC set up in my 1960's Aerokit Sea Commander with a modern electric system. Unfortunately, I’m not sure that I was given the right advice and although the boat runs ok, it is slow, only reaching what I would call a scale “river-cruising” speed. I would like it to be capable of a bit more (without reaching “racing” speed) and wondered if anybody can advise me on a more suitable engine/battery/controller configuration? I am currently using an MFA Torpedo 500 motor powered by a VP 3700 7.2v 3700mAh battery pack through a Fusion Aquapower 128 (128A max continuous current) controller. Any pointers will be gratefully welcomed.

Imara by johnp Petty Officer   Posted: 1 month ago
[Score: 8/10] 46"/16000g Imara Capable of 5mph and a runtime of 90mins Twin Propellors (4 Blade 45mm) Geared to a 2x6 volt decaperms (4 Blade) Powered by Lead Acid (6v) 6Amp/h Batteries Controlled Through Old Midway models ESC - Comments: Very heavy but great to sail, has an old steam engine sound system with whistle and mast nav and cabin lights

X System by figtree7nts Fleet Admiral!   Posted: 1 month ago
Hi Awesome engine, You better get it patented!

X System by mactin Chief Petty Officer   Posted: 1 month ago
Hi Edward, Its a fine balancing act of electrolysis to hydroide gas, compression then ignition but utillising vacuum formation as an assisting force to the power stroke so effectively making it a one stroke which sounds odd.still in development ive tried turbine,oscillator pistons and hydraulic recoil as end movers but the best seems to be the straight reciprocator. Its scary,how the hell can they tax water??? cheers Neil.

X System by cenbeth Captain   Posted: 1 month ago
Hi How does this work? Edward

X System by mactin Chief Petty Officer   Posted: 1 month ago
hello MBWs A little project im currently working on which may possibly change everything its a non aspirating zero emissions adjacent combustion two stroke submarine propulsion system its self sustaining and its fuel is good old H2O! yes I know you probably think im mental and youre probably right but ive had the test bedder running.

Dr. Ing. Sander by Inkoust Commander   Posted: 1 month ago
The German model of fire boats. Hull with plankováním-wood, fiberglass superstructure. Drive 2 pieces motru 400 with gear ratio 1: 3, used customized truck from washer pump and powered by the 400 system. Complete illuminated flagpole, lights, cabin space and marker lights. Lifting the fire escape personally manufactured servo. Two functional water cannons. Batteries 2 pcs NiCd 3000 mA

Sad News by figtree7nts Fleet Admiral!   Posted: 1 month ago
I had San Pedro in the bath a day ago, Just doing a seaworthiness test! I think she was in the water for about 5hrs, needles to say she took on about 4oz of water! I didn't realize until a day later when I picked her up to put her back in the water. I saw a water stain didn't pay to much attention to it. I went to turn on her running system. As you can imagine I had a look of dread, when I saw all that water and no pump to pump it out of the engine room... I took the batteries out, they suffered no damage. The electronics was pulled out and dried! I left the superstructure off so the engine room can dry. It will be a few weeks of drying, before I can try to access where the leak is coming from.😡😡😡 But I think it's all the weight she carries. 21lbs is quite a bit to carry! Oh, well I'll figure it out later...😭😭😭

KuK TB IV by Dainesh Chief Petty Officer   Posted: 1 month ago
[Score: 10/10] - Comments: Kaiserlich und Königlich (KuK) TB IV Recently built scale model boat (1:50). It is a fine art work. Length: 884mm Beam: 95mm One 3 blade propeller. Main armament: 2 45cm torpedo tubes, 2 4.7cm/L44 Skoda rapid firer. Crew: 20 people Speed:27.5 knots In 1905 the Austrian Naval Technical Committee presented three different designs for a 110t coastal torpedo-boat, mainly differing in the propulsion system (VTE or turbines). Having insufficient experience with turbines, a final VTE-propelled design with oil-firing was presented in 1907. To compare it with foreign technology, Krupp, Schichau and Yarrow were asked for competitive designs, all of which turned out to be inferior. Initially STT was ordered to build 8 such boats, but this was reduced to 6, because Danubius had to participate. When the older torpedo-boats lost their names in 1910 in favour of arable numbers, these units became in consequence Tb 1-Tb 6. The boats were surprisingly seaworthy up to sea state 5-6, and during the war they saw active service on escort, minesweeping and anti-submarine dunes.