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This is a small item but very visible on the wheelhouse and since the standard for this item has been set I have to follow suit. So first of all get some 3mm blue LEDs ordered and then it’s on with preparing the white metal body. I used by hand as suggested a series of drills increasing in diameter until 3.1 dia was reached but only 2/3 down the length from the front the smaller hole (1.5mm) was bored right through for the wires to exit. Arrival of the LEDs, first check the LED using my power supply, just over 3 volts seems to illuminate to the correct level. Next was to remove the shoulder on its plastic casing so the whole body does not exceed 3mm over its length and lightly abrade the outside to give a diffused light. Next cut the LED legs to 2mm from the plastic casing noting which is positive, next prepare the wires. I used Futaba servo wire cable 22awg which is very flexible and with the white signal wire stripped off leaving a red and black wire. These were tinned and cropped to 2mm and then quickly soldered to the appropriate terminal. Next check the LED still works! first hurdle over, I now needed to check the that when the LED goes into the body it doesn’t short out so checking the diameter over the widest part which is over the soldered terminals this was 0.1 below 3mm. I decided that shrink sleeve was too thick so I mixed some epoxy resin and coated all around the terminals, this proved to be satisfactory in both non-conductivity and dimensionally. Now the final test, using some aliphatic wood glue I slid the LED into the body whilst it was illuminated as it was a tight push fit, bingo it’s still lit – leave to set. I used aliphatic glue, as it would be easier to remove should I ever have to change the LED. The body still needs painting white but this will be done with all the other fittings at a later stage.
Adhesives are a combination of Epoxy for the structural joints and aliphatic for non structural joints unless the type of material is an issue eg white metal fittings adhered to wood would be epoxy and canopy glue for transparent components.
Now I am in the swing of planking I may as well do all the remaining decks that need planking. Therefore, very much the same procedure as before with a mahogany border, followed by caulking the inside edges of the mahogany border, then cutting the planks roughly to length, and then finally trimming on the disc sander for an exact fit. When all he planks have been dry fitted, they can are removed and glued with aliphatic glue. A couple of days to completely dry then it’s on with the sanding before finishing with sanding sealer I marked all the nail holes using the marking tool I made. This is all on this deck until final finishing which will be done with all the other decks.
I first cut the base material to size allowing a card thickness all round for final clearances. The lower deck has a number of features in it that need to be measured. I took dimensions from the plans and marked out the base. Again following the upper deck which has a mahogany boarder I cut and planed a further amount of 6mm x 1.5 strips of material. I started by outlining the mahogany boarders, Some years ago I made a mitring device for picture framing which has come in very handy for doing the corners. Having all the pieces cut they are then glued and temporally pinned in position until set. The next job is to prepare all the edges with black card and then measuring each plank across the width starting from the centre line. I must take into account how the planks sit against main access hatch and the battery hatch opening however, all seems to look good but until each plank is positioned and glued with its caulk divider it’s difficult to tell. When preparing each plank I first cut each piece oversize with wire cutters then using the disc sander I trim square one end, then place in position and mark for final length and finish again on the disc sander giving each plank a nice push fit Because lime planking varies in colour across a batch I numbered each plank across the deck varying the pattern of colours as I cut each to length. Next I cut a number of card pieces to length and start to glue (using Aliphatic glue), plank, followed by card filler across the half width, then repeat the other side. Finally the battery hatch and main access hatch are treated in the same manner. Next comes the finishing , I use a very fine grade on my belt sander (I attach a block on the underside of the main access deck to control the sanding process) to remove the majority of excess irregularities followed by an orbital sander for a fine finish. If there is any staining by the black card residue I simply remove it with a pencil rubber. Next I put the nail holes in again using the jig I made to ensure uniform spacing and then gave a coat of sanding sealer. Final finishing will be done as a complete assembly. Preparation of the side panels is the next process before final assembly
Hi there Colin I used 0.3 mm black card just cut in to strips using a rule and Stanley knife then using aliphatic glue, gluing each piece in followed by a plank and working across the piece, then removing the excess card with a blade followed by sanding with dry sandpaper, if there is any staining of the planks this is easily removed with a pencil rubber.
Having remade all the front cabin window frames I then decided to fit the acrylics into the opening (nice tight fit) all done! Or maybe not, someone then said how about “opening windows” it’s been done before. So would opening windows be a problem with water ingress? And would putting foam seals solve this problem? I’m not convinced. Having given the problem some days thought, how about going with the windows as planned which are now 1.5mm thick and inset into the surround. Then fitting an over window frame 1.0mm ply/plasticard with another thinner (1.0mm) acrylic window and hinging this above each window. This would solve the issue of water ingress and also give the appearance of opening front windows. Looking at how one other person approached this, it looks like the hinge was a brass tube across the majority of the window top and then a shorter piece the same dia tube at each end with an internal wire for rotation these short pieces are then fitted to the body of the inner window frame. These additional window frames can be added at a later stage and this doesn’t hinder the final finishing of the roof skins. So final fitting and adjustment and then pin and clamp in position the forward roof skins. When these are dry the window frames can be finally trimmed and then pinned into position and checked for fit then removed and then to each one apply the aliphatic glue and fit –pin and clamp in position
Hi dennisw - I use both Titebond 3 (green label) and the Aliphatic Sandable Wood Glue which I get from Cornwall Model Boats (not the first plug I have given them but no connection, just a very satisfied customer). It is described as "quick grab, excellent sanding, shock & weather resistant, bonds porous materials, ply, balsa and hardwoods, non-toxic and non-fuming". So far it has not let me down. Best of luck with your build. Smiffy
I haven't posted for a while as I have only been running on three cylinders, but all four firing now, so off we go. An edging is glued around the boatdeck, this then allows a thin piece of plasticard to be glued in place for the boatdeck bulwark, after the glue had dried, planks cut from a sheet of veneer were glued inside and out and the bulwark and finished with a teak capping. A cardboard template was made for the boatdeck overlay planking, this was then transferred onto 1mm ply for the planking to be laid on. Using planks cut from a sheet of veneer and cotton thread for the caulking, Aliphatic glue, a tooth pick and my best glasses the planking was completed. The finished planking was given several coats of clear lacquer rubbing down in between coats to give it a nice finish. Planking at this scale with fine thread as caulking is definitely a labour of love.
Before we continue I must mention some fine detail that should have been mentioned in the previous build update and that is the preparation of the cabin sides. Because the bow end of the cabin sides narrow there is a need to score/cut through partially in the places indicated in the build instructions, this is around the cabin side window and enables the side to bend without cracking the external faces, and this also applies to the rear of the cabin sides where it joins B5. The cabin side extensions can also be glued into position as well To continue, having secured all the bulkheads to the keel I can now epoxy the cabin sides to the bulkheads ensuring that the height is maintained side to side and bends smoothly round to the bow and stern. Allowing this to set for a couple of hours I can fit the deck stringers from ¼ x ⅛. These are cut to length to suite the gaps between the bulkheads and glued in place using aliphatic resin glue. I also added some extra support where the cabin side extensions are since its only a butt joint.
Hi Ed ABS and wood can both be glued with Epoxy (two part) but white aliphatic wood glue will work just a well on wood to wood joints. Billings kits I have built in the past did tend to give advice on the glues to use. A light coat of sanding sealer works well for me. Make sure you coat both inside and out and support flat sheets to prevent warping. A Build Blog of your progress would be great! Good luck
[Score: 7/10] 19"/1100g Dolphin 16 (19) Capable of 10mph and a runtime of 20mins Single Propellor (3 Blade 30mm) Direct Drive to a Graupner Speed 600 8.4v (3 Blade) Powered by NiMH (7.2v) 3Amp/h Batteries Controlled Through Chinese 320amp (10Amps) ESC - Comments: This is the Meccano Magazine January 1967 issue plan, built in balsa. I didn't do a build blog as the construction is well covered on the net. Started with an A4 plan and used Excel to enlarge it onto 9 A4 sheets. I chose something simple as I haven't built a boat for thirty years. Really enjoyed the build and re-learning how to overcome the problems that always arise. She is oversized being 19" long and having a 7.5" beam. She sits nicely on the water and begins to plane. Will upgrade the the battery sometime. The decking is worktop edge strip pre-glued but in future will use the unglued strips. The cabin was adapted to extend over the whole boat as there was little space for modern electrics. I will add in and out air vents as the motor will need to breathe. Also, the true model should have an upper deck and windscreen and this will be easy to add sometime in the future. Really surprised and pleased with results from aliphatic wood glue. The finish, which I am not completely happy with, due mostly to my own impatience, was achieved with Ronseal multi purpose wood filler, lightweight fibreglass laminate with Eze-Kote. Paint is Acrylics and Marine varnish. The electrics are: Acoms AR 201 Reciever, Servo Acoms AS 12, Cheap Chinese ,supposedly, 320 amp ESC and 7.2v Nimh battery pack. The Graupner Speed 600 8.4v, bought it cheaply some months ago, was already in one of my boxes and you can see the adaptation required to fit it into the boat. All the Acoms controls I picked up at a boot sale including an Acoms Techniplus Alpha Transmitter on 27mhz. Inside I used Hammerite Smooth Gold as I couldn't buy silver. Modern Hammerite is thin and squeamish and took 3 coats to provide reasonable coverage. One final rant I do like the new silicon wires but they are a nightmare to solder to a motor. I think I will use soldered connectors in future. So there we are, first model in 30 years and now so many models to build and so little time. Lessons learned...... don't be impatient.
Not quite the same thing but something useful When using say a Bottle of Aliphatic or P.V.A. or similar glue it can get abit messy with lack of control of the flow. Bang good sell small plastic dispenser bottles which you can decant you glue into from your bigger bottle.Makes things a lot neater. Very cheap too
Just made my first dovetail corner joint on one of the decklights. Seemed to work out OK once I'd I'd got the shape of both parts in my head. Used the vice jaws as a guide and a piercing saw to cut the joints. My Aliphatic glue had dried up, so I had to use PVA, so no pics till tomorrow in the daylight, In 1/16th scale the decklight over the main saloon (see above picture) is 4ft. x 2ft-6in....3"x 1.875". Nowhere near big enough to fiddle in my sail winch system so I think she may have to be a rudder only job. No sweat really. I had hours of good sailing with an old plastic 375, rudder only. Unless I can work out an invisible method of lifting a section of decking. AND keeping it waterproof! Martin
Hi Chris. Like yours, my very first wooden boat was held together with Cascamite. I'm very happy to recommend Titebond 2, it's an aliphatic resin that's waterproof, dries very quickly and forms a very strong bond on wood to wood joints. I have used it extensively in the construction of my crash tender project. The other glue I have used is Z-poxy 30 minute epoxy resin, great for wood to metal and various other materials. I hope that is helpful. Rob.
Various wood used ie, Ramin, Mahogani, Annegre, Veneer ply, Balsa. Strip planking is Obechi. Glues used: Cyno, Aliphatic wood glue where sanding required and where strength and waterproof glue is required I've used EpiGlue two pot Marine glue. The planking is used because of the many difficult shapes and curves of the hull construction. Once the sanding and shaping of the hull is completed the hull will be sheathed with a fibreglass cloth skin and resin then sanded smooth and spray painted replicating the steel hull of this vessel. Cheers, Kevin