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About George-JK

  • Birthday 04/26/1995

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    Villach, Austria

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  1. Making of Christmas tree Since the model is sufficiently large enough, I will be fitting most of the lights with LED's. I started by the windows (not shure of the correct name for these) that are at the bow. For this I used SMD LED's for their ease of mounting, but not of soldering. I made two stripes with 3 LED's each for either side, I also made a pair of LED's for mid-deck lights. The SMD LED's are really small, and the used enameled copper wire is of miniature dimension, the diameter is approximately 0.35 mm. This picture shows the position of the mid-deck LED position, this LED will have to be mount before the bull is finished, because later it will be hard to get it's position right.
  2. Since the hull is near being completely planked, I went and bought a set of new prop shafts with covers. I did this for multiple reasons, first, the supplied ones used brass friction bearings on both ends, they seemed to be of quite good quality, but better be safe, then to have to drill out a leaky prop shaft of a finished ship. The new ones have a pair of brass-graphite bearing. Second, the supplied ones were using a thin walled brass tubes as their covers. This poses a thread of an easy bend for example during transport. And lastly, the new ones have an engine mount, to which the engines are screwed, ensuring their squareness. Some pictures of the new prop shafts, with propellers, for checking easy movement. Outer view of the new prop shafts test fitted. Stern view, checked if the props are parallel. The propellers are 4 bladed brass dia. 50 mm suitable for nozzles. The inside view of the prop shafts, one can see the engine mounts on the ends.
  3. After a long time, I got back to building this model for a while during the winter holidays. During the semester I, from time to time glued some planks, resulting in almost done hull... The almost finished hull planking, here while bluing the first bow piece. The bow planking is made of two pieces glued together to make the rather complicated bend. Here in more detail: Here is a side view of the glued piece, one can see a rather large gap between the two planks (approximately 1 to 2 mm wide), this is a result of incorrect sanding of the bulkheads. Luckily it should be easily filled with some spare wood. The bow view. Lots of modeling pins are needed to hold the piece in place. The piece was first soaked in hot water and bend to the rough shape it needed to be prior to gluing. To finish the planking it is necessary to paint the middle deck area (if this is the correct name of this deck), because the final plank will effectively flock the access to the roof, in this picture in the right corner. I added the anchor winch of my own design to the hull. The main parts are made of 10 mm Plexiglas glued together using CA glue. The axle is made of a stainless M8 rod, the end-pieces are washers between two nuts, secured by blue Locktite. the used engine has a gearbox with ratio 298/1 and 20 000 RPM, resulting in around 67 RPM at the exit drive shaft. The engine is then connected to the axle via a homemade clutch. The "drum" containing the anchor chains, which still need to be blackened somehow. And the placement of the winch in the hull. (there the hull is upside-down due to easier mounting of the winch).
  4. Lately I don't have much time to spend on this project, must work on my diploma thesis. But nevertheless, I was able to do a couple thing, start planking the hull, finish the anchor winch (the pictures for these will follow in the next post/s), and recently in the nights I started to 3D print some practice things. Recently I designed and printed Kort nozzles for this model. I created them using "reference" ictures from google and some basic information from some web-pages. The results are from my perspective quite good and will use them on the build. The inner rounded sections are 51 +/- 0.1 mm in all directions, which is for this application good enough. The bottom slot is for the rudder support. The only thing that is necessary is to polish them and pain them red. George
  5. Finally the thrusters are complete The body is made of bronze, the drive shaft/worm is made from an M3 screw and the worm gear is made of brass. The final gear ratio is 1:31 and the driving engine should mahe max RPM of 28800, this then gives around 930 RPM on the propellers. The basic parts of the thrusters; body, worm gear, the worm/drive shaft, and the engine. the assembled unit, with the pair of propellers. The stern unit painted red, and taped for grinding the exes material of the aluminium engine mount. both units are finished, the frornt is glued together, the rear will be glued once inserted into the hull. Enlarging the rear thruster hole, lots of dust... Also some parts came.. The pair of the main propellers, 50mm diameter blade design for kort nozzles, of course Left Handed (LH) and Righ Handed (RH). And the speed controllers (ESC) for the main engines: These are marine ESC's with maximum of 30 A of continuous current, the engines are rated for 28 A burst for ~30sec. As one can see the brush-less engine has 3 wires leading from the ESC into the engine. By changing the connection of two of those wires the engine changes its rotation, without any impact on performance of lifespan.
  6. Thank you everyone. I hope to post some interesting pictures this week, since the thrusters will be complete however I'm not sure if I'll be able to build for the next week, I fell of my bike on the way to school... George
  7. Yesterday some goodies arrived, the propellers of the two thrusters, which are planned to be finished tomorow. A two pairs, each thruster has a LH and a RH propeller.
  8. Continuation on the Hull: Since the bottom was already attached and I got the order of epoxy, I started to waterproof the base structure of the hull. Here is also added the deck for the electronics, that are going inside. The stern view of the ship. With the view of the added servo mounts, one servo per rudder, this will allow for independent rudder movement. The details of the servo mounts. They are made out of the remaining pieces of the hardwood dowel used to create the towing-rope anchor in the hull. The Decks: After waterproofing of the hull with epoxy, the main decks followed to be glued to place. The bow deck is being glued to place. The stern deck with the supports for the side planking and the inner supports for the towing rope leads. All of these supports were first glued to place by a drop of super glue, then secured to place by epoxy from the bottom side of the hull. Dry-fitting of the bow supports. Now it looks more like a piranha fish, the a boat Front view of the bow supports. The Bridge: Next on the list is the bridge. Here I must say that, the kit is really elaborated. The non right-angle joints are made by scraping, I would prefer to have a modeling wood plane for this work.., the two joining parts. With some patience and a sharp scalpel this was easily completed. The lower part of the bridge. Details of the angle joins of parts. The inside of the entirety of these joints is to be coated with epoxy. Glued lower part of the bridge with dry-fitted the upper part. The Assembly of the upper bridge. the roof will not be glued, for I intend to make the interior of the bridge. For which I managed do find a few pictures on the web. The upper windows are being glued, the roof is there just to make sure, that everything fits OK. Finished control room exterior. Now it will wait for the interior. The last for now is the crane. P.S. If someone is still following I do apologize for the long pauses in the vlog. I have lots of work in school right now, I hope to update this build log more often by the start of August.
  9. The Hull Since I am still in the process of making the thursters, the work on the ship is quite slow, usually I just glue a plank or two in the stern area. This is the one of the handful of places where actual planking is being used, most of the hull is "planked" by large pieces of pre-cut 2mm plywood, not that I am complaining, it's just that this way is easy to do and fast... Attaching the bottom parts. Started the planking of the inner stern bend. Since I didn't post for a while, I already have finished the stern planking. And here comes my first question for the more experienced members. Do you know of a trick of how to sand these kinds of surfaces? I think this is a convex surface, in mathematical terms. I used my thumb, and of course ended up burning it a bit... The Rear deck During these weeks I was also working on the rear deck, where a planked area of the deck is. For this I got for myself 18 meters of mahogany strip and 5 meters of lime strip. In the course of one day, cut the mahogany to 700 pieces and started the patient part of the process. The strips, 3x1 mm mahogany and 1x1 mm lime. The detail of the glued planks, the black stuff is PVA mixed with black color. Was trying this method out, turns out, it is quite a good one, except the amount of sanding needed to get it finished. In the process of sanding... The almost finished deck. A few more hours of sanding at fine grits, and at least 3 coats of semi mat lacquer, and it should be done.
  10. Recently some necessary parts arrived. First to arrive were anchors, anchor chains, colors and new wood for the read working deck, specifically mahogany and lime strips. Anchor with the chain installed, for now only temporarily by a copper wire. Second to arrive were thurster engines. These are really small ones, 22 mm in diameter and 16 mm thick, they are 49 W of power and 2300 RPM per Volt George
  11. The Hull So finally the hull frame is finished, with all the modifications, that I wanted to do. The frame glued together, keeping everything perpendicular was the main goal. After extensive checks, I must say, that the level of precision is highly satisfying. The detail of the modified bow. The cutouts of the side supports (on this picture marked B ) are being kept for gluing after the bow thruster will be complete. The cutout for anchor. And the front view. It starts to look quite big George
  12. Thrusters: So recently we started working on the thrusters. The construction is of stator with worm bear of reduction 1:10 approximately, depends on the capabilities ofthe machune The first parts made are for the rear thruster, the body and the stator housing. The steel rod will be turned to the warm gear. Next thing I did, was repair the fallen off bow part of the keel. I added two pieces of hardwood by the sides to reinforce the construction again. Then the stern dowel followed. This piece creates a surface where, on the real ship, the towing line slides of deck. Next I moved to the central section of the hull, here I planned to create an anchor for the towing line so it would be possible for this ship to tow actual payload (I mean to use this ship for tug towing cups). The anchor is created from the rest of the hardwood dowel in a simple manner, the hardest part was to thought up a way, how to transfer the force to the keel without having the hull deform. Place for the towing line anchor. I deemed to put the anchor to the middle bulkhead (3rd on this picture) The anchor the the force transferring dowel beeing glued to place. Side view of the construction. I tried deforming it "by hand" it held steady for what i would dare to try, so I call it a success.
  13. During this week I started the works on the hull, since we got to move with the thruster units. They'll be custom made by a colleague of mine Here are some photo of the hull. Starting from the font, gluing the blukheads. To preserve right angles I used an angle and a sawing ring, for it sufficient weight and also right angles. Here you can see the hardwood triangles used to stiffen the hull. Also as one can notice the bow is missing, this is due to cutting-out the space for the bow thruster. Getting to midsection of the hull. Attaching the keel side-parts to stern section.
  14. As the main assembly of the hull is on standstill, due to the missing bow and stern thrusters, I started assembling sub parts of the construction. The first on the list were ports for prop shafts. Here is the prop shaft dry-fitted before gluing. And the finished parts, glued to their respective bulkheads. The image shows the bulkhead assembly, cleaned from most of the glue. The second possible assembly to make was the rudder section, it also consists of two bulkheads and some parts creating the rudder stands. Gluing of the base of the rudder assembly. Adding stern of the ship.
  15. I don't believe it is a model, looks so real that with right angle of photograph one could be completely deceived, that it is the real deal... Great work

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