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Back to the build. Next milestone, to complete the superstructure and engine covers. The superstructure is essentially a cowl that supports the open bridge and serves as the air intake for the gas turbines. The engine covers fit into the rear of it. The superstructure is full of curves and will be interesting to make. Still trying to save weight, decided to make it out of glassfibre. Rather than first make a plug then a female mould and finally the cowl, wanted to try the technique of making a plug out of styrene foam sheet, then covering it in a glass fibre matt. Once the glass fibre is set, the foam is dissolved out using a solvent and the cowl remains – Inshallah! To ensure the foam did not react to the glass fibre resin, painted the finished cowl with enamel paint before sticking the matt down. See pictures. What a mess! The resin had crept under the paint and into the foam dissolving it. When the resin dried the plug had shrunk slightly and had the surface finish of a quarry. First thought was to hurl it and start again, this time in wood. On second thoughts, wondered if the plug could still be used. Decided to build it up with wood filler and from it make a female mould, as originally intended. The cowl would then be made from the mould. Built the damaged plug up and sanded it smooth. As the plug would be covered in fibreglass, the surface finish was not critical. Brushed a coat of fibreglass on the plug and, after drying filled any defects with glaze putty and sanded smooth. Once the finish and dimensions were satisfactory, applied a thicker coat of glass fibre to the plug. This was again smoothed down, waxed with carnauba polish and then covered in mould release. From it the cowl was made. Picture shows plug, mould and cowl placed side by each. The cowl requires reinforcement; the fittings and various mountings then adding before installing. A trial installation showed that it fitted properly the deck and was accurate. A lesson for the next time is to make the plug and mould much deeper than the finished item. That will allow any rough edges, on either the mould or the component, to be trimmed off leaving a smooth fibreglass edge.
[Score: 10/10] 48" HMS Cadiz Capable of 3mph and a runtime of 120mins Twin Propellors (3 Blade 25mm) Direct Drive Powered by LiPoly (14.8v) 7Amp/h Batteries - Comments: Scratch built other than a fibreglass hull, built by my father over about 5 years using a mix of balsa, plasticard, ply and wire. He never sailed it but when I inherited it I was determined to complete it ready for it's first "sea trials". I've completed the RC installation and adjusted the ballast and it's now had two successful outings at the local boating lake.
Three weeks ago I got a Proboat Sonicwake deep V fast electric. This appears to be a replacement for their previous model Vorocity. Very interesting self righting method with a water tank on the port side, slots in the deck and a large exit point at the stern. Idea is that if it capsizes, water will enter through the slots and as it draws the boat under, the air trapped in the hull will self right it. If the boat is stationary in the water, it will list to port due to water entering through the stern outlet and when power is applied it will empty out. Bit scary to watch at first as I thought the boat was on its way to Davy Jones. I use waterproof marine clear tape to seal around the hatch ever time I use it. The quality of the hull raises a few concerns. This relates to its ABS construction as the vast majority of similar boats at that price are made of fibreglass which is much more rigid and would be more suitable for the high speeds. Makers claim it does 50 MPH plus on 6S lipos. The electrics however are excellent with the exception of the external quality of the Horizon Hobby STX2 TX which looks a bit "toyish". For myself, this is not relevant as I replace all my wheel TXs with the "stick type" and I found that the Futaba T2HR fulfils all requirements and worked well when I sailed the boat. I have not yet changed the stock prop for an Octura one, the latter works great on my Blackjack 29 with a noticeable increase in performance. The motor is a Dynamite Marine W.C brushless 1900 KV with a 120 amp W.C ESC . 😁😋 Boaty.
[Score: 8/10] 33"/2000g Hydro Capable of 0mph and a runtime of 10mins Single Propellor (2 Blade X Type 45mm) Direct Drive to a Sss4075 (2 Blade X Type) Powered by LiPoly (18.5v) 5Amp/h Batteries Controlled Through Flycolor (105Amps) ESC - Comments: Complete fibreglass.straight shaft, uses three channels. Speed,Rudder,and flaps for rear plane .when using best to wear brown trousers (on 5 cells I have had 57.4 mph
[Score: 8/10] 48"/2000g Leilah Marie Capable of 10mph and a runtime of 60mins Twin Propellors (3 Blade 55mm) Direct Drive to a GHD (3 Blade) Powered by LiPoly (7.4v) 5Amp/h Batteries Controlled Through Hobbyking (20Amps) ESC - Comments: Fibreglass hull and top.deck is hand laid planking with black card in between to simulate caulking.props are prop shop three blades at 55mm each working radar and search lite. Mainmast lights consist of white over red, learned this very early in my career first thing you see when pilot comes aboard is his white hair, followed by his red nose..... full lighting system. Plus nav lights
Oh I know what to do with 'em, Doug, just not sure I could DO it! I think if you need a quick outboard and won't pay Graupner prices, you're stuck with a HobbyKing who do 2, both very similar, but about 65-70 quid a pop. I've just realised my little vintage outboard will go on my little fibreglass clinker dinghy, making it a wee fishing boat. I will have to put 2 servos in the dolly (dressed as an old salt). One will turn it on and off and one will steer once I've put a tiller on it. No ESC needed. Old o/bs either run or not, so he can turn the little brass switch on and steer it. Painted harbour launch grey, with a couple of lobster pots and a dog, it'll be a sweet little model. Martin
Found on E Bay but sold in June of this year, a 42 inch kit of a Simplas Marine Construction Vosper M.T.B. It would appear that there are not many about now. I built one in 1972 and the kit contained a fibreglass hull with all fittings including the guns being in cast metal. Deck and superstructure were plywood and the boat was a model of an early Vosper as it had a very narrow beam and torpedo tubes were towards the stern. I fitted a DC Sabre 1.5cc diesel but had to add a lot of ballast which resulted in a sharp drop in performance. This was solved by replacing the Sabre with a Fuji 15 marine version glowplug engine . The boat was free running and as I was on an apprentice engineers pay and could not afford r.c.as I was having to support an ageing Mini. This was my transport from Ellesmere Port to the boating lake in New Brighton. If I had bought a Taycol Supermarine motor it would have solved all my problems as the battery would have been the ballast. Boaty 😁
My dad built this over a long period of time, starting in the '80s. The hull is fibreglass and the rest is scratch built from plastic card, balsa, ply, wire and anything else he could adapt. Although he installed the motors, props and rudders he never completed the RC installation or tested it. I inherited his boat models a few years ago and wanted to "finish the job", getting the model on the water. After installing the RC gear and batteries over the last few months, this weekend was the first sailing outside the bath at the Valley Gardens boating lake. Happy to report that it sailed really nicely, seems to be reasonably stable although I did restrict it to calmer times when the MTBs and faster boats weren't running ! HMS Cadiz was a battle class destroyer, laid down and launched during WW2 although she didn't receive her commission until 1946 so didn't see combat with the Royal Navy, serving with the home fleet. Due to the changeover in pennant numbering she was originally allocated R09 and later, when the admiralty decided to revert to the D for Destroyer pennant numbering she was assigned D79. To reflect this my model has D79 on the starboard side and R09 on the port side. She was sold to Pakistan in the late '50s, and renamed PNS Khaibar. She was sunk with the loss of nearly all hands in 1971 in the Indo-Pakistan war.
After the application of fibreglass or matting i usually put on a second coat of EZ-Cote.After drying lightly sand.Overlaps I find easy to level up with another coat of EZ-Cote.I have been using the same bottle for 3 years.That stuff really stretches.All the wrong size fittings can always be used on other projects or modify them to suit yours.
On to Coating and Matting. (as well as sanding!) Now have at least finished all the stripping. Then did the ‘bright light in the hull bit’ to look for areas that needed patching. The major problem area was in the bow and that did not receive the light as it is a totally blanked off compartment. However, it was obvious from the outside anyway so, could I assume it was the only leak? Decided to put a fine matt over the whole hull, not deck, just to be sure of best chance of success. I can imagine what will be said here if it still leaks after all this! I had ordered some supplies ready for the next stage and drew up a plan view of the boat to help think through layout of electrics and other items. Made my usual mistakes about size. Some fittings purchased too small………However, never too large now that’s interesting. Some materials purchased too large. Now have a life’s worth of Resin……(when does it ‘go off’ by?) Also have a lounge floors worth of tissue matting! Also Sandpaper. Now there is a mine field. So now I know a bit more about that and which way the numbers work! When I forgot to put the mask on, I had some of the crispest 'bogies' in years.............. No images posted! On the plus side, although I never wanted to get into this stripping sanding, filling sanding, sealing sanding, matting sanding, painting sanding, painting, sanding bit……………. I now feel I started out with someone’s boat I had bought and now it has become “my boat” for real! I am at the stage now where I have put some filler in and applied the first coat of Eze-Kote from DeLuxe Materials To use Eze-kote read stuff from RNinMunich on this blog or the’ leaking boat’ thread. Washes out of the brushes very easily. There is such as this ..... Youtube link - watch?v=yP05qv3QtUk RNinMunich or Colin H. and the like have bits of extra comment and experience that is always very helpful. BTW, after that finer sanding before first coat, I did the dust down and vacuuming bit but it still felt a bit ‘chalky’ so I gave it a wipe with Methylated Spirits. Now I realise that has water in it, so if anything goes wrong it could be blamed on that................. Having left the first coat to dry I started to cut out the light matt to apply after the next sanding. The matting I have is called Glassfibre Surface Tissue EGlass from FibreGlass Direct. A part of Tricel Composites (NI) Limited. Available internationally in lengths from a metre upwards, it is quite fine in weave so we shall see what happens. I have left quite a wide margin at the moment but may reduce that when I have tried using it! This is another first for me so plenty of room for mistakes............... Will need to cover with the matt in stages as I cannot get around all the boat without changing its position. Going for the bottom of the vessel and stern board first as I figure they are going to be easier than some of the other bits. Then will leave that to cure before moving the boat. Really worried about the joins/overlaps and how well I will cope with those, not to mention the curved bit! Started to look at electrics and layout for a bit of a change. I will post again when I have had the first battles with the matting! TTFN. NPJ
Evenin' Neville, I told you you'd get the hang of it pretty quick. (It was either that or you'd burn the house down😲)😁 Seriously; I'm proud of you👍 You had the guts to give it a go and you're learning fast 👍 Hat off Sir! A few observations; (Colin might also have some at this point, had a very nice chat with him on the phone this afternoon - but that's another Encyclopedia Britannica!) #1 If the paint scraps are smoking the gun is too hot or too close, or moving too slow. Wind it down to 350 and see how that goes. Back up to ~400 if seems necessary. #2 Bow cracks; I see a bodge up there where someone couldn't bend the skin properly or, benefit of the doubt (In dubio pro reo!), maybe it was collision damage. Whatever; filler in a thin crack will always vibrate out again sometime😡 Try to get at the inside and seal it with two layers of fibreglass tissue well soaked in resin, EzeKote is what I used. Wait about 10 minutes before applying second layer. Then it should bond well with the first. When that has set (ca 20 - 30 minutes) then you can apply some fine filler from the outside. When set sand smooth and seal the whole hull outside with two layers of FG tissue. Sand smooth and if any bare wood appears apply wood sealer or EzeKote thinned with 10% warm water. Don't overdo the water or it takes yonks to dry and set - Yes, it happened to me🤔 Then continue with priming / finishing as described above; or look in my Sea Scout 'Jessica' blog for the fine details. The beauty of using EzeKote for all this is that you can get a whole hull done inside and out in one day and no mixing ratios to cock up😊👍 If it's any consolation to you; when I did all this on my fish cutter and PTB loads of filler went soft and fell out as well, and the 'goo' holding the prop shafts in my PTB as well. No sweat as I wanted to realign the shafts anyway! TIP: I removed all shafts rudders and any other protrusions in the way so there were no 'twiddly' bits left to make things awkward. Leaving the odd patch of sanded paint which is still firmly fixed to the wood is OK; as long as you can't feel a 'bump' with your finger tips and you are going to seal it with resin and primer anyway. Then it can't react with the new paint. Here endeth the 3039th epistle from Admiral Doug. Will all dissenters, contradictors and other lobbyists and Trump lawyers please queue up at the Spanish Inquisition Office next door. Take a number, we'll grill you in turn 😁😁 How do you like your stake? Cheers All, Happy building and renovating, Doug 😎 Now back to me fish cutter gearbox, mechanical gubbinses are not really my strength🤔 HAMMER, have you got a minute please!? (Viewing / reading tip; click on the thread title, then you can read the the structured version in paragraphs as I wrote it 😉)
Hi Neville, yep, only took about a half hour per hull 😊 And NO DUST 😉 If adjustable use the gun on medium heat and don't get too close or too long on the same spot or you'll scorch the wood. As soon as the paint starts to bubble or flake lift it with a not too sharp but not blunt 3/4" chisel. The gun will blow it off in chunks. I found that the chisel was more effective than a normal scraper. Work the gun from side to side just ahead of the chisel. After that I shone a very bright light inside the hull, which instantly showed up the holes and thin spots. I ringed them all with a felt tip and they then received extra attention and fibreglass strengthening. That'll fix your leak wherever the heck it is😊 Eeezy peezy😉 So - Tally Ho matey! Cheers, Doug 😎 PS I didn't have to 'scrap' either boat 😁😁 PPS I love the embedded insect fossils in your hull! Or are they cave paintings?? 😁
Evenin' Neville, For God's Sake (Whoever he may be) put the wire brush back in the drawer and save it for cleaning engine blocks😲 Use a heat gun and a scraper to get the paint off without destroying the wood. Like I had to do with my Gina 2 fish cutter and PTB hulls. Much less dust than trying to sand / wire-brush the paint off. That way will take you a month of Sundays anyway. The sand the hull flat and cover it with two layers of fibreglass tissue and resin. I used EzeKote, no mixing, no smell, sets in about 20 minutes and brushes wash out in warm water. 😊 Apply a final coat of resin. Sand flat and prime. The pics show these three stages for the cutter and the PTB. If the crack is bad reinforce it on the inside with a couple of layers of tissue and resin. Then give the whole inside of the boat two coats of resin. Take out anything that stops you getting down to the underwater hull and keel joints. That should fix your leak once and for all, strengthen the boat to help prevent any further hull damage if you hit something underway and give you a good base for the final colour coats. Bon chance!👍 Now back to fixing the prop shaft in my cutter.😉 Cheers, Doug 😎 Oh, and by the way - 'DON'T PAY THE FERRYMAN'!