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>> Home > Tags > nozzle

nozzle
kort nozzle
nozzle
Fairplay V (Hegi) rebuild / refit by Radiosailor Sub-Lieutenant   Posted: 2 months ago
Today my Fleabay find arrived in a big box: O dear... ...Nothing wrong with the new hull, paperwork consists of some printed scans with the main drawing in just A3 format. That drawing doen't show any measurements, but partnumbers. The superstructure and wheelhouse are... well, they show 'some' patina. (cough) Since there are no other drawings of the used parts everything must be expanded to the correct size, and then made/build. Thinking about using thick foam sheet material for frames and ABS sheet for the deck, so I can speed up the process a bit. (not having to paint any wooden parts, and use epoxy for bonding) Thing is tough, I need to decide which engine, propellor, shortnozzle and battery combination will be good. (another tread over here) Let's hope that hull is as good as it looks once I'm trimming off the excessive material... it might have become brittle over the years. The plan is - as soon as the hull, deck & hardware are done - get her on the water with the old wheelhouse. Meanwhile I can build a new one using 0.2 and 0.5mm ABS sheet.

Propulsion Hegi Revell Fairplay V tug model by Dave M Fleet Admiral!   Posted: 2 months ago
Hi Radiosailor I was not familiar with the model so have just searched. The Tug forum http://modeltugforum.com/ has an article by a member who did some mods. If you register you can see the pics and ask for advice. Regarding fixed or steerable nozzles they both work better than a standard prop. For maximum effect the steerable works best and this will certainly be the case with a single prop. I have had both types on tugs but mine were twin screw and I could turn both on the spot with independent motor control. From the motors you have I suspect the Xdrive 555 may have the best torque which as Doug said is best for Tugs. There are several suppliers but without knowing any measurements it's difficult to point you to a specific site. It should make into a nice model and will certainly look the part on the water. If you look on Model Slipiway's web site http://www.modelslipway.com/ they have a kit Al Khubar and AZIZ which are twin Kort. There are links to build blogs for the AZIZ which may be useful. Model Boats and MMI also had featured articles on builds for Al Khubar.

Propulsion Hegi Revell Fairplay V tug model by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi, I can't profess to be a Tug expert but I believe the general rule is 'Low revs & Hi Torque'. I hope one of the tug fans here will pick up this thread. Also this forum might be useful to you; a discussion on kort nozzles & tugs 'Fixed or steerable'. https://www.rcgroups.com/forums/showthread.php?1536288-Steer... style='background-color:yellow;'>nozzle-vs-fixed-kort-and-rudder Good luck, let us know how it goes. Cheers Doug 😎

Propulsion Hegi Revell Fairplay V tug model by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi Radiosailor, have a look here http://www.mobilemarinemodels.com/kort- style='background-color:yellow;'>nozzles-69-c.asp might give you some inspiration. Cheers Doug 😎

Propulsion Hegi Revell Fairplay V tug model by Radiosailor Sub-Lieutenant   Posted: 2 months ago
I recently bought a on Ebay 'stranded' vintage harbourtug which will be fully rebuild. (I actually bought a NOS hull, and old - but good build - superstructure and all the deckgear & fittings. Except for some essential parts... There's no kortnozzle/rudder and propellor. I would like to know what size of nozzle and propdiameter I should mount. Originally it was designed with a steering nozzle/rudder, but the only item which comes close is the fixed nozzle as used on the Robbe Happy Hunter salvage tug model.(which has twin nozzles) That nozzle would be fixed with a seperate rudder for steering. What would you advise? What alternatives are available? (Making a proper nozzle myself which actually works and looks to scale is out of the question.) Attached three photos: one showing original (steering nozzle) and teh other with this Happy Hunter fixed nozzle, and te drawing showing the design.

Sprinkles by Commodore-H Sub-Lieutenant   Posted: 2 months ago
Sprinkles, a scratch built, U.S. Coast Guard PWB (patrol boat waterways) is just about done. Operating features include; working running and searchlight, rotating radar and blue emergency beacon. Water monitor on cabin roof can traverse and squirt water 10-15 feet. Bending tubing for the water monitor was difficult, it is actually a composite of several types. Nozzle was made on Unimat. Pump is a Sig "gas passer" Propulsion is from two 600 size motors geared 2:1 with 9.6V Nimh and 3 blade 45mm Graupner props

Sprinkles by Commodore-H Sub-Lieutenant   Posted: 2 months ago
[Score: 10/10] 32"/4500g Sprinkles Capable of 3mph Twin Propellors (3 Blade 45mm) Geared to a Electrofly (3 Blade) Powered by NiMH (9.6v) 5Amp/h Batteries Controlled Through Viper ESC - Comments: Sprinkles is a scratch built U.S. Coast Guard PWB, patrol waterways boat. Operating features include; searchlight and running lights, revolving blue emergency light, rotating radar, and a water monitor that fires 10-15 feet and can I studied various styles of water monitors and finally decided on one that is a composite of several types. Bending the tubing was difficult, nozzle was made on Unimat. Power is from Sig "gas passer" pump. I purchased the rotating beacon on ebay and power is from 5V voltage regulator.

Hobby Engine Richardson Upgrade by jarvo Fleet Admiral!   Posted: 2 months ago
HI Neville, why did i move the bridge, Ha. the main reason was to make my boat different to the standard, i cut away the staircase and a small part of the railing, re-drilled the mounting holes and basically that was it, i have 4 of these, so each one is different, none except Richardson have the stairs, the first i re-painted in Smit colors, second was like the first but only removed the name and re-named as Itchen Marine Wyforce, using vinyl decals i had made, the third re-painted in Wiesmuller colours, but with the funnels re-located on top of the air intakes with a firefighting bridge across with 2 fire nozzles, they all get a lot of interest, cost very little to alter but are different. Mark

Juntilla by Krampus Captain   Posted: 3 months ago
So, here's my current project in the works. I got a nice 25-inches Deep-Vee fiberglass hull a while ago and now (finally) have a concept for it. Almost by accident I came across a plan for an American bass boat which in turn reminded me of a boat that caught my attention when I was a kid while reading a boating magazine. The boat is a 28-footer from a now defunct firm named Uniflite. It was a small deep-sea sports fisherman called "Salty Dog". Uniflite was very well known within the American boating circles during the 60s, 70s, and 80s. Uniflite created and supplied PBR river patrol craft to the US Navy between 1965 and 1972 for rivers in Vietnam using an already existing pleasure boat hull and adapting jet nozzles for propulsion. So, I just created a prototype template of the cabin so more to follow 😎.

Aerokits Solent Class Lifeboat by RNinMunich Fleet Admiral!   Posted: 3 months ago
So is one of mine. Depends mainly on whether the paint reservoir is a little cup above or a big bottle below the valves and nozzle = mini spray gun! The former is for the tiny stuff and detailing (bits 'n pieces), with nozzles of (Odd! something went missing on posting???) ... nozzles of (Same phenomena again!!??) ... I give up, Good night 🤔

3d printing by marky Fleet Admiral!   Posted: 4 months ago
Try something different day at work on Friday so signed up for the 3D printing workshop ,we had to design something and then print the first attempt was a bit rough, scaled it down worked fine did 4 prints in silver changed to a different PLA , nozzle size and multiple print not exactly what everyone else was printing but my choice seemed more useful than a mobile phone holder

Jet Sprint Boat by Dave M Fleet Admiral!   Posted: 6 months ago
Hi Phil I have no experience with three point hydro so any suggestions / observations are not based on personal experience. Is it always the same sponson that lifts? With three points of contact any slight misalignment or weight difference could result in one point digging in and raising the other. This would be made worse if the thrust nozzle was slightly misaligned. As Doug has pointed out the full size were difficult to keep in a straight line. You haven't said but I assume you correct the lift by turning the Nozzle. When I used to fly model planes I used to apply slight right rudder to keep the model straight on take-off and I wonder if you could apply a similar principle to your model. This is real cutting edge modelling and I look forward to hearing how you progress. Dave

Jet Sprint Boat by philpjuk Sub-Lieutenant   Posted: 6 months ago
Thanks Dave,no the dinghy had no torque reaction on a steady throttle just when the engine was "blipped".I started with a butterfly flap in the nozzle which worked ok,replaced that with a steerable tube beyond the nozzle which also worked ok and finally with the nozzle itself steerable mounted on a flexible pipe which did not work (the flexible pipe was far from flexible when full of water at pressure!).The question was because I have built a three point hydro with a strimmer engine which becomes two point due to torque,lifting one sponson as the throttle is opened.

Jet Sprint Boat by Dave M Fleet Admiral!   Posted: 6 months ago
Hi Phil and Doug There is no noticeable tork effect when using a nozzle. My nozzles use a steerable tube at the nozzle exit to direct the jet port or starboad. Reverse is achieved by using a bucket effect over the end of the steering nozzle. However the use of a steerable flap inside the tube may have this effect. If you had a banking effect with the dingy you can expect the same with this model.

Jet Sprint Boat by RNinMunich Fleet Admiral!   Posted: 6 months ago
Hi Phil, I'm not sure but I think the 'bundling' effect of the tube and venturi effect of the nozzle could damp the torque effect to some extent at least 😉 Cheers Doug 😎