Cookies used in this website are gluten free, wheat free and dairy free. By using this website you agree to our use of cookies. More Info
Guest
Login Below
Join Us On Social Media!
   
Get The Model Boats App!
Apple App Store
Android app on Google Play


Help Support This Website
£
or enter custom amount

(Non Contributor)

Help support this free
website and donate.



£285 a year is needed to keep the website and apps online. Please consider donating £5 or more to help towards these fees.
All donations are securely managed through PayPal. Amounts donated are not published online.

Many thanks for your kind support.

Model Boats Website Team


Donation History
July 2018: 5 people
June 2018: 8 people
May 2018: 7 people
April 2018: 24 people
March 2018: 13 people
February 2018: 8 people
January 2018: 25 people
December 2017: 7 people
November 2017: 3 people


Unique Visitors This Month

Website Members

Terms and Conditions
Privacy Policy
Advertising
Contact


Model Boats Website
Active Users (13)
Login or Register
To Remove This Ad

Login or Register
To Remove This Ad
>> Home > Tags > coats

coats
coats
Hull Pt2: Motorisation - Come What May!! by RNinMunich Fleet Admiral!   Posted: 17 hours ago
As promised (or threatened?😁) stage two of the hull work and thoughts on motorisation. The hull was sprayed with two coats of grey primer/filler. Pic1. As usual this showed up the remaining imperfections (pics 2 & 3), but I'm not going to worry about them until I've got prop shaft tube and rudder stock sorted out and permanently fitted 😉 After my attempts to make and thread a 3mm prop shaft went awry Martin (Westway the Mechanicals Master👍) stepped in and made me a decent one complete with a bushed stuffing tube 👍 Vielen Dank Meister😊 I did however manage to make a 4mm to 3mm reducer so that I could fit a Rabeosch 35mm prop as seen in pics 2 & 3. The tube and shaft from Martin, arrived Saturday an' he only made it on Monday😊, have been dry fitted so that I can start setting up the gears, necessary to bring the drive down to the prop shaft fitted very low down in the hull, and motor mount. Pic 4. Motorisation: (Remember folks - this kit was designed and built as a static model!) I want to use the old 1950s Taycol Target motor which my Dad originally fitted in the Sea Scout which I have renovated and upgraded to brushless. See Build blog 'Sea Scout - Jessica' Many of you will know that the Taycol motors were field coil motors, meaning that they have no permanent magnet around the rotor coil, and thus reversing the battery connections to the brushes had no effect on the direction of rotation, as this simply reversed the magnetic fields of both stator and rotor coils🤔 To counteract this so that the motor could be used in both forward and reverse with a conventional brushed ESC I modified the motor slightly (separated the two coils) and built a simple converter board to connect it to the ESC. Again see the Sea Scout blog for the details of the conversion. Basically; once the field coil and brush-gear (rotor coil) have been separated a simple diode bridge can be used to apply the output of the ESC to the motor. This enables the reversal of EITHER field OR rotor coil polarity, depending on how you connect the converter to the motor. Thus reversing the direction of rotation of the motor. Beneficial side effect is that the diodes also suppress the commutator sparking😊 In my case, with the Taycol Target, I also cleaned, flattened and polished the commutator. Thus significantly reducing the potential for spark generation in the first place! A peculiarity of the Taycol motors is that they all use metal brushes, pressed phosphor bronze strip, so they need oiling! DO NOT oil conventional brushed motors with carbon brushes unless the brushes are exchangeable or you want to have to buy a new motor!!!!! Pics 5 & 6 show the proposed position of the Taycol in Gina 2 and pic 7 the prototype converter board I knocked up to test the motor, together with a Graupner Navy V30R Marine Brushed ESC. Details and results in the Sea Scout blog, including video of the sparks and oscilloscope pics of the drive waveforms before and after conversion! The latter showing the spark suppression effect of the converter😊 Some samples attached - last 3 pics. Pic 8 pic shows a more compact version of the converter, one of a few types I'm doing for Martin's various Taycols as a trade for the prop shaft he made for me and some useful material he sent. Thanks mate👍 Next steps will be 1) mounting the gears correctly on the shafts, requiring the manufacture of a 3/32" to 4mm adaptor and a 1/8" to 4mm adaptor, and keying them to the shafts - Hooray for mini milling machines 😉 2) manufacturing bushed end plates to hold the gears in place, 3) fitting the motor mounting platform. I'll probably borrow from my experiences of real shipbuilding and do this as a suspended 'false floor', i.e. mounted on stiff springs to enable adjustments to optimise the gearing mesh! On real naval ships this is done to improve shock resistance and to minimise engine noise / vibration conduction to the hull, thus significantly reducing the acoustic signature of the ship. Not that I'm tooo worried about being torpedoed 😁 Worth a try😉 Pic 9 shows the cleaned up and renovated Taycol Target motor. Pic 10 shows the drive waveform complete with sparks before modification.🤔 Pic 11 the cleaned 'forward' waveform with the converter board. Pic 12 the cleaned 'reverse' waveform, no suppression capacitors needed 😉 More soon folks, Cheers, Doug 😎 PS Along the way a new keel was fitted as can be seen in pics 1 to 3. The original builder had 'buried' the keel in the hull planking! 😲

After fibreglass and primer coat by Ron Fleet Admiral!   Posted: 17 days ago
So, the hull has been fibreglassed, and several coats of primer applied. What next? Mark the water line as seen on the PDF and photographs? OR Place model in water, load up with approximately the weight of servos, batteries, and other building materials? Paint exterior hull or wait till interior servos are mounted? Scratch building questions...

Spektrum, new, useless... by RNinMunich Fleet Admiral!   Posted: 24 days ago
I agree Haverlock, One definitely, potentially, possible final thought😁 Martin; Did you pull the bind plug out BEFORE you switched off the RX? If the green light at the RH end of the LEDs on the TX was lit it MIGHT mean the RX was bound OK. Can happen so quick you may not have noticed! Esp. if the better half popped her head round the door to offer another cuppa at the vital moment😉 JFF stick a servo in the RX and try it. You may get a pleasant surprise. If you don't - nothing lost. If you do - have fun with it. Good luck. Doug 😎 PS Re PTB; when I started I thought it would just be a Cosmetic job; clean up flat back and respray in Pacific green camouflage. Ho ho ho! After I got started I found some curiosities in the construction and that the prop tubes and rudder stocks were misaligned. Never mind the ESC that burst into flames when I tried an 'as bought' test. So from then on it was clear that I had a full rebuild / reno. on my hands. "Hey ho hey ho it's off to work we go"!😉 All old paint now off, chine rails repaired / replaced and first coats of resin and tissue strengthening applied. Might get to the priming tomorrow or Sunday.

Warped wood by RNinMunich Fleet Admiral!   Posted: 28 days ago
Hi Martin, Yes I'm very happy with it. 😊 Not the cheapest but very good. I use the whole range from Base coat Pore Filler (Sanding sealer) through matt, satin and full gloss varnishes. In both brushing tins, for small part brushing, and spray cans for the bigger stuff like hulls and decks. The cans don't reveal what the base is but the thinners is white spirit or any of the usual 'universal' substitutes. It's made in Holland, supposedly specially formulated specifically for model builders! But it's available all over the shop, I get mine here from Krick. Just Google Lord Nelson varnish and you'll find loads of outlets, and Hotels 🤔! For Sea Scout I used all spray; 2 base coat, 2 coats of satin varnish, as undercoat! Then 2 coats of Gloss varnish. Needless to say thin coats! And left to harden under a 300W halogen lamp😉 Lots of 'flatting' back in between culminating with 3000 wet & dry, wet with a little liquid soap. Final polish using two stage paint cutting / polishing paste from the Petrol Head world. See pics. Full details (including the bloopers😡) in my Sea Scout Build Blog. Have fun with it, cheers, Doug 😎 PS Shame about the Lupins😡, that hybrid sounds fantabulous! 😉 BTW: if you use the brushing stuff thin with 10 to 20% white spirit, otherwise you'll find, as I just did with base coat sealer on the deck of my PTB, that it takes yonks to get the brush marks out 😆

Warped wood by RNinMunich Fleet Admiral!   Posted: 30 days ago
Evenin' All, I had the same problem with the cabin roof of Dad's 1962/3 built Sea Scout. First I thought I could just remove the ply tops and flatten them, hot water and then under a car battery overnight. But the ply was cracked and curled just at the overhang so even after gluing, soaking and straightening it was still cracked and useless. So finally I soaked the frame alone in hot water and left it under the battery for a day and a night, with suitable wedges to get the right shape . In the meantime I made new roof skins from 1.5mm mahogany. Worked out quite nice in the end. Took a while though to get it right, especially along the centre line seam. Then I set 5mm round neodymium magnets in the corners, with counter parts set on wooden brackets inside the cabin walls to hold it on at speed on the wet stuff. Before assembling and varnishing with Lord Nelson spray gloss varnish I sealed all parts with two coats of Lord Nelson spray wood seal. Survived it's sea trials quite well. https://youtu.be/zPgYicA0yGw Penultimate pic shows the before 🤔, last pic shows the after 😉(while fitting new tinted windows) Cheers, Doug 😎

Rubbing stakes by mturpin013 Fleet Admiral!   Posted: 2 months ago
Before I do the final coats of epoxy the rubbing stakes need to be fitted but then Robbob pointed out the vulnerability of the bow particularly when transporting through doorways. I decided to take that advice and make a brass bow bumper, this will not be visible when finished but will stop any structural damage if the bow is hit, it was screwed and epoxied in position. The design also incorporates a location for the rubbing strakes holding them in position when fitting. Thanks Robbob

Fibreglass the hull by mturpin013 Fleet Admiral!   Posted: 2 months ago
I purchased as recommended by Robbob the fibreglass package which consisted of 750g of epoxy resin and 250g of hardener, I also went for the 90min cure as this is the first time I have ever done a boat hull, I’ve done plenty of stranded fibre cowlings/air intakes etc. where you lay a gel coat first then stranded matting which is so different to laying a fine matt on its own. I also ordered some mixing sticks and throw away brushes. First I cut the matting to the slightly oversize for one of the side skins, then loosely taped the matt to the bottom skin and checked the coverage - and checked again then fold over to the opposite side, this then leaves the surface clear to apply the resin. Mixing the resin should be done accurately, so borrow the kitchen scales and here we go. I wasn’t sure how much to mix for a side skin but 25g of resin and 7.5g of hardener looks about right. So mix well and then brush onto the side skin, then I gently lifted over the matting and laid it on the skin and gently brushed the matting down, the matting is almost sucked onto the resin so minimal brushing is required to ensure a smooth surface A previous blog said that “Less is More” how true this is, the temptation to spread the remainder of the resin on to the already adhered matt is something to be avoided, however learn by my mistake as I did just that (only in a small area on one skin) leaving rather a lot of sanding later after the resin had fully cured as it leaves a rather lumpy surface. So onward and upwards the following three surfaces were relatively easy with only minor difficulty keeping the matting in close to the 90 degree angle between the keel and skin and I had to keep going back to it pressing it in with a steel rule until the resin started to go off but minimal resin left a surface that was flat and the weave of the glass matt can be clearly seen and felt but minimal sanding is required if at all. Then a further 2 coats of resin with sanding in between will leave a smooth surface ready for final preparation of painting. The final picture is of the roof that in a previous page I said to add strength the roof would need a coat of glass to reinforce the unsupported edges – To be continued

Spray painting hulls. by Westquay Fleet Admiral!   Posted: 2 months ago
Ah, cellulose, of blessed memory. I still have some, come to think of it, but forgetfully, I bought black gloss enamel for Vanity and some enamel primer for it also in black First coat on today. But I will definitely experiment with spraying the final coats. I sprayed an old pre-War Marblehead with enamel and it went on well. You can still get cellulose if you can convince the dealer it's for your classic car. My son has a 1951 Renown so I could always quote all IT'S details to get it, but I don't think they'll post it and I'm nowhere near any suppliers geographically. I couldn't see the point in paying for epoxy tissue so I bought a huge bag of J cloths from Poundland and used that with epoxy. Slarred the epoxy on the mahogany hull (made from old chair legs my Grandad had made a dining suite with) and then laid the J-cloth on the tacky epoxy and slarred more on with an old credit card. All my credit cards are old now and a damned site more useful as epoxy squeegees than they ever were before. Got a few ridges where they overlapped, but filler sorted that out. The hull is still very light, so will need all the large lead weights on the end of a long fin keel (removable) as it carries a big rig, (see avatar). Good luck, Martin

Deck Colour by RNinMunich Fleet Admiral!   Posted: 2 months ago
Evenin' George, any mid to dark green would do nicely. Suggest a satin / semi matt paint. Something like the Humbrol 131 or 195 in the attached chart. Of course it doesn't have to be the little Humbrol tins (unless you have an airbrush😉) but a similar colour in aerosol, maybe from Tamiya. Type depends on what was on it before!! To be on the safe side give it a couple of thin coats of grey primer first. Flat off with 600 wet & dry then apply the colour coats. E.g. acrylic. Where on earth, and when, can you sail up there in the frozen North!? 😲 Good luck, and have fun, cheers Doug 😎

Which Paint? by boaty Captain   Posted: 3 months ago
4 years ago I restored an old 34 inch Aerokits Crash tender. I used filler for any gaps in the joints then prepared the hull with sanding sealer having got it really smooth. For the rest of the paintwork I first used Halfords primer then used their acrylic for the final colours. I gave it four coats of colour leaving it over a day between each coat. When painting was finished and after checking it was fully dry, I rubbed the hull down lightly using Maguires scratch remover, (also from Halfords) and got a nice shine between the deck and the red waterline. It seems to have lasted well as it has not crazed over this amount of time. The total cost of the primer, paint and especially the scratch remover was not cheap but in the long run it did work. Boaty🤓

Bristol pilot cutter mascotte by kmbcsecretary Fleet Admiral!   Posted: 3 months ago
Back to the main hull Have finally got the hull sprayed today with this heat it has been drying faster than I can spray it on 😄 Firstly the hull was sanded with a 200grit paper to sand of the shiny coating to give the paint something to key too. It has had three coats of undercoat sanded with 2500grít wet and dry paper between each coat.the undercoat used was Halfords rattle can plastic primer. Then the lower hull colour was sprayed on again three coats sanded with 2500grit paper between each coat.colour used was Halfords rattle can ford arctic blue. the top half of the hull was sprayed with two coats only with it being black plus I didn't have enough paint to give it a third coat😋 colour used was Halfords rattle can satin black. Finally the hull was sprayed with Halfords rattle can clear lacquer three coats sanded with 2500grit paper between each coat.

Gloss Varnish? by marky Fleet Admiral!   Posted: 3 months ago
Dont know if you want to brush or spray ,Rust-Oleun spray gloss is very good as long as you don't try to put it on to thick (milky sheen)but if you follow the instructions thin coats and drying time between coats it is a good finish. Cheers Marky

Graupner ranzow refitting by kmbcsecretary Fleet Admiral!   Posted: 3 months ago
Have finally got round to sanding the deck edge to blend into the hull using permagrit files and 200grit sand paper ready for its couple of coats of a water based varnish before applying the paint Ron

wooden ladders by AlanP Fleet Admiral!   Posted: 3 months ago
Yes, I think it was Fred, they were given a couple of coats of clear lacquer after sanding to finish them off.

Bits n pieces arrived / Aft Deck Mk 2 built ;-) by RNinMunich Fleet Admiral!   Posted: 3 months ago
6mm lime wood planks from Krick and 4mm tap from Conrad arrived on Wednesday so Full Speed Ahead. This time formers were made from the 6mm lime so no bending or slitting required, new piece of mahogany cut so that this time no inserts left an right were needed. 😊 Formers attached using Rocket cyano and a bag of clamps and left overnight. The 'Riva' tank filler caps were tapped 4mm and appropriate holes bored in the deck piece. Neodymium magnets attached to forward edge. Deck fitted and trimmed in situ for flush fit all round. Transom got scratched during this process so will need a respray🤔 Underside sealed with two coats of EzeKote and sealing / varnishing / lacquering process started on the topside. Last two pics show current status; So Far So Good.😉 Next step; fit windows made of 3mm green tinted acrylic 'glass', which also arrived Wednesday. Will now have to start thinking about what to do in the cockpit 😲 All I have so far is a 25mm ship's wheel. Furniture building is not exactly my Forte! First time for everything I suppose! Suggestions gratefully received!! Ciao for now, Doug 😎 Almost forgot! While waiting for varnish to dry I tackled an old problem with the rudder. Namely; asymmetric rudder throw caused by the rather bulky connecting rod binding on the rudder arm! Suddenly remembered I still had some E-Z Connectors from old aircraft days. Been hanging around for 35 years or so waiting for something to do! So replaced the old plastic linkage with 1mm spring steel rod and two E-Z connectors. Works a treat 😊