Hi Gardener, Don't know the Sadolin stuff, I use Billing Boats stains meself, BUT whatever you use, esp on balsa, apply a coupla coats of sealer first. Then at least one or two coats of clear satin varnish; e.g. from Lord Nelson range from Holland. THEN AND ONLY then, apply your stain til you get the depth of colour you want. After that seal with matt, satin or gloss varnish / lacquer according to taste😉 That's the way I did my Sea Scout 'Jessica' renovation, see blog on this site for results!!! Coupla sample pics attached. The whole process is described in the Blog. Otherwise the balsa will soak up all your stain and still not look right 🤔 A 'preserver' as such is not normally necessary if the wood is properly treated inside and out; sealer, stain, varnish etc! Or just EzeKote resin inside. Stain no needed inside of course. Good luck and above all have fun with your endeavours. 👍 Keep us 'up to date' ('on the running' as my German friends would say; 'auf den Laufenden'!) 😁 Cheers, Doug 😎 PS I like Danish Blue meself 😁😁 On the other hand; I wouldn't have used balsa for speedboat deck in the first place. I use a close grained marine ply 0,8 or 1.0mm. Takes the stain better and looks more realistic. Balsa is too coarse grained for stain and varnish on scale speedboats. Thick coat of paint ... OK. On the cabin roof and after deck (which I had to renew) I used 1.5mm mahogany veneer. If I had to do it again I would use a close grained 0.8mm marine ply (birch or pear) and cherry stain (also Billing) as I used on 'Jessica's deck.
My pleasure TJ, get well soon👍 But as an ex Pat living in Germany for 30 odd years and having worked on several types of Fast Patrol Boats / Fast Attack Craft your spelling of Schnellboot is still making my hair stand on end! 🤔 BTW: DON'T cut the switch wires on the ESCs or you won't be able to turn them on! Cut the red wires in the 3 wire cables from the ESCs to the RX. Cheers, Doug 😎 BTW 2: boat looks good, nice work👍 I have a couple of 1/72 kits for E-Boat / S-Boot, hope mine turns out as well as yours! 😉
Mornin' John, agree re chromite, but still don't know what chroDite is! I only personally own the one Taycol Target. I got into this whole Taycol business while I was renovating Dad's old Sea Scout last year and decided I wanted a bit more Oomph so upgraded it to a 1000kV brushless, which gives goods results on a 3S LiPo. See the vids I've posted of the the 'Sea trials' (Lake Trials!?). So I decided to use the Target in the ancient Billing Boats Danish fish cutter I'm restoring and converting from static to RC. Figured the Target would cope OK with the plodding pace of a fish cutter😉 BUT, I wanted it to be reversible without cumbersome external switches or relays as recommended by Taycol / Keil Kraft in those days. After surfing around a bit a found a website where others had tackled the same problem. Looked at their solutions and refined them slightly. All I do is rectify the pulsed (square wave) signal from the ESC with a bridge rectifier (4 hi-current diodes in a bridge form in one package), apply the + and - outputs from the rectifier to the field coil so that it produces a constant magnetic field just like the permanent magnet of a canned motor. The two alternating (pulsed) outputs of the ESC are applied to the AC (~) inputs of the rectifier, which go + / - or - / + according to the command from the TX, I apply to the brush terminals just like a normal brushed motor setup. The output of the ESC is a train of either positive of negative going DC pulses. Pic 2 the positive train on the scope. Pic 3 the negative train. The larger and wider the pulse the higher and longer the voltage is applied and the faster the motor spins. So called Pulse Width Modulation (PWM). The gaps between the pulses are smoothed out by the inertia (flywheel effect) of the motor, and anything hanging on it - like a prop and a few million gallons of wet stuff 😁 Hey presto, a field coil motor that runs forwards or backwards on command 😊 Main thing is simply to separate the field coil from the armature coil (i.e. brush gear) so you can control each one independently. No rocket science but highly satisfying when it all comes together and works on the pond. OK, I'll look up Mr Lynch, wasn't he the Sarge in Z Cars 😁😁😁 Cheers, Doug 😎
Hi TJ, that instruction is quite correct👍 It indicates that the ESCs have Battery eliminator Circuits (BEC) which means that there is an internal circuit which 'syphons' off 5V from the main drive battery to supply the receiver via the red wire in the ESC to RX cable. The ESC itself takes it's power from the drive battery. If all three red wires are left connected this will cross couple all three BEC circuits and may well damage the ESCs. The RX only needs one power supply! 😉 In my multiple shaft boats I usually disconnect all the red leads from ESC to RX and fit a separate RX battery. Cheers, Doug 😎
Hi All here is the last on the schenllboot S100 I have been able to finish the paint work on the hull and she is now ready for final coats of varnish and full reinstallation of the RC equipment , still a bit nervous about that, part of the installation instructions are indicating the red wires on two of the esc,s need to be cut , I think this is the switch wire so the you only need one switch to active the other motors . I will look in to that before cutting
My mate said it as Chrodite, with narey a hint of a pause, so I just assumed he knew what it was. I think it's effectively Admiralty brass, more or less. Not quite bronze, which is BLOODY hard! But ace bearing material. Goes brown but doesn't corrode further. He made hundreds of his own bolts from it, but had to sell the boat before he finished it. Bearings for a Supermarine? Mine has its original stuff, Just the end plates of Paxolin with felt oil pads held on with a pressed brass cap. It's worked all these years and there's not a thou. of slop. Amazing. I suppose though, mine never really got a lot of use in the few years I used it. Only odd weekends for as long as a pair of lantern batteries would last. Maybe 10 minutes each! Anyway, if it gets another working, great news. I'd like to see Colin's fleet of old codgers. I'd feel right at home Mind you, I sent off for a brushless ESC today and will have to get some batteries soon to test the motor. Its a tiddler, but it's 174 watts, so should work. Worth a try anyway as it cost me nowt. Martin
Hi Boaty, The Taycols have fascinated me as well, ever since I dug the Target out of the Sea Scout my Dad built in the early sixties. I blogged my renovation of that and the conversion to run with a modern RC system and presumably that, and the converter boards I built for Martin (Westquay), is what triggered Colin to ask me to have a look at his Supermarine. How could I resist!? 😉 The 'smell of something electrical' is the ozone gas caused by the prolific sparking of the Taycol metal to metal brush / commutator combination. The other source of Ozone is on the coast wherever there is a strong surf! I agree, a nostalgic smell, which unfortunately disappears when the converter board is attached to make it run with a standard brushed ESC. The diode bridge kills almost all the sparks. 'Almost' so the usual suppression capacitors are still recommended. 0.1µF across the brush terminals, 0.047µF from each terminal to the motor can, or frame in this case. Earth to prop shaft tube as well if possible. The motor may not disturb the on-board electronics of your own boat, if using 2.4Gig, but could still affect anyone nearby using 27 or 40Megs. The power density of spark transmitters (e.g. unsuppressed E-motors, peaks in the upper HF bands and diminishes to almost zilch in the UHF bands. I.e. approx 300 MHz upwards. Like me and other submariners for instance; 2.4Gig is useless for subs cos it don't go underwater. Cheers, Doug 😎 But here! BTW Boaty: where are the pics of your Avanti? Harbour posts without pics are pretty dead 🤔 Cheers, Doug 😎
Evenin' Colin, Thanks for the offer. I'm going to use some stuff the Martin sent me, called Chrodite apparently, although I can't find any description or reference to Chrodite anywhere! Looks like brass with an extra ration of tin. Supposedly harder wearing. Anyway, stator and frame spacers etc are now finished.👍 So after feeding the inner man I'll start measuring up for the bushes and see what I can do about tidying up the drive shafts. Have just sorted out a 'Live Centre' for the mini lathe which should help. I want to hide the bushes inside the original Paxolin cards and the external end plates which contain the felt oiling pad. So ball races are out of the question unfortunately; too large diameter and too thick 🤔 Needle roller bearings would be nice, but I ain't got none that small😭 (Nah, admit it Doug you ain't got none at all, they're way too expensive😭) Amused myself today polishing up all the brass nuts and bolts! Confucius he say "Polishing nuts - very painful" 😁 Weather should be good for spraying tomorrow so I might fire up the compressor and give my PTB a blast of Pacific Green. 😊 Cheers All, Doug 😎 BTW: where are the pics of your Avanti? Harbour posts without pics are pretty dead 🤔 Cheers, Doug 😎 Oops! This doesn't belong here!🤔
W1 by jbkiwi Chief Petty Officer Posted: 4 days ago
This is my scratch built 36" RNZAF British Power Boat 64' HSL (arrived in NZ 1940). I actually went on board this vessel in 1968 when it was still in original form (the RNZAF having disposed of it in the 50s) This vessel is still around and has been recently re modelled (2nd time since early 70s) and I was lucky last year to have met the present owner and go on board (2nd time in 49yrs!)and take a few photos. The vessel was modified a number of times by the RNZAF over the years (air intakes, removal of the fore deck machine guns, wheelhouse turret etc so I sort of went in the middle. I found a few drawings of the type in an old mag which had side and top views plus the bulkheads and their positions, so I took them along to a copying shop and kept enlarging them until I had the desired proportions. This worked out quite well and using a few methods from other models I had built, managed to frame (ply) the hull and then fully strip plank it in balsa. It was then fiber glassed. The deck is ply, lined and varnish stained. The wheelhouse is varnished balsa with the top removable for access. The wheelhouse interior has detail such as controls, instrument panels, skipper, steps to wardroom etc but is not too detailed as it is not seen. The boat has full lighting by remote switch, lights are all LED. The propulsion side has dual everything (motors, ESCs, sound units), would have had 3x but ran out of space! Motors are 28mm 2200Kv water jacketed in-runners (cooled by remotely switched pump) using 30A Chinese ESCs (have 5A BEC, Fwd and Rev). Twin sound units are 'GT Power' car units which have around 40 different sound selections, from Cosworths to diesels and are computer programmable (as well as manually on the unit ) for various functions. I am using one of the v8 sounds (8 cyls short in my application) which I think is as near as you are going to get to 3 Napier Sea Lions (for which there is obviously no sound available) They 'start' 'Idle' and are fully proportional in fwd and rev and can sound quite realistic (will attempt to put up a vid later). Batteries are 2x 2200mah 2s 20c LiPos which will last around 2hrs at least of sailing (they also run the sound units) Still have a few small things left to do (have just made wheelhouse air intakes) but don't want to get too fiddly. Just want to keep it a practical model.
This is a restoration of a launch I was given that was found in a rubbish bin on a farm here in Auckland It is an old RCM ? plan built 'Fairacre' and was pretty rotten when I received it as it is made in balsa and had been wet for quite a while. I stripped it down, re 'planked' large portions of the hull and fiber glassed it, re- built the cabin, re- marked the deck planks, fitted lights, curtains (ex Graupner Commodore bits from the 70s I had kept), stern ladder, cleats etc. It is fitted with a 540 brushed motor (originally had an old Graupner monoperm) and 70s Graupner ESC and Using 2.4 Radio gear. I still have a few things I'd like to do such as a re-wire, fitting chine spray rails, better motor and maybe some safety rails, but for now it does the job.
Hi Colin, sorry nearly missed this. Don't think a fan will be needed for the motor, max current should only be around 5A and it's a hefty chunk of metal. BUT it could be useful to cool the ESC and especially the bridge rectifier in the converter board for reversing the motor. You will need something with a 1/4" 'ole in the centre. Cheers, Doug 😎
Just got white metal castings back of the Chris Craft fittings and very nice they are too. They have started to burnish up a treat and will polish well as Paul uses a good quality metal. Nice and hard. Now I have to make the light lenses. Also put the blue bottom on her at the weekend using my one and only pot of Plastikote enamel paint, not the acrylic muck they've turned over to and it went on through my spray gun as smooth as could be. Even my masking worked. Just waiting for a gold pin stripe tape for the boot topping now. The final bit will be masking the deck to paint the covering boards and king plank with the same blue. For those not lucky enough to have a wee pot of proper Plastikote in the paint cupboard, I also got a couple of tins of Rustoleum spray, only 5-25 a pot, enamel (of course) in a nice French blue and a rich cream. These colours will look good on my Darby One Design single stepper "WHO'S DARBY?". Very post War. I think the Oulton Broad One Design single stepper will be Burgundy and the Whippet One Design will be varnished mahogany. I know of no other classes of British stepped hydroplanes. These will all be 1/6th scale as they're all around 12-13 ft. long. I'll probably put the same motors in them eventually. The Darby is well advanced and has a Speed 400, but I may go brushless. Any suggestions for a cheap Brushless/ESC combo will be welcome for, say, 3S Li-Pos. It would be good to see these period boats all racing together. I also plan to make reverse clinker Singer cadet and a Percy See Bugatti engined boat for which I have plans. I'm hoping to get a response from the current keepers of Berylla II about measuring that, too, since it also uses a Lea Francis engine, like the Whippet.
Hi Pete, Thanks 😊 Yep, I decided to stick with 4 lights cos tha's all I see on the original 'WYEFORCE'. Yep again! I do intend to modify the two lights on the stub mast; 1 yellow 'Towing' and 1 white 'Stern'. I will also fit a wheelhouse light. Decided to do it 'fluorescent' style by fitting 2 white 3mm LEDs in the ends of a long block of 5mm perspex. After that the 2 work-deck floodlights, lower cabin lights and 2 deck lamps 1 each side of the main cabin. I'll probably link the cabin and deck lights so that they all come on together. Now pondering how to build a miniature working diesel genny to power them all😁 Good luck with your divider! You will have more wires to squash in than I did so I doubt there's room. Have fun trying. I separated the wires quite easily by keeping all the negative legs of the LEDs (that's the leg going to the larger electrode in the diode) on one side and soldering them to the brass wire negative rail first. Then I took colour coded thin 'hook-up' wire to each LED in turn; working from the top down. Cut the LED leg to 1/4", stripped the hook-up wire back 1/4", twisted the wire strands together and tinned it. Tin the LED leg as well and bend it 90° down the mast. Then it's easy to solder the wire cleanly to the LED keeping it well away from any other wires. When all was connected, and tested OK, I stuck the wires down with thick gel super glue so they can't wander about. To fit the LEDs to the mast, I removed the brackets; removed the dummy lights with a razor saw, filed the mounting flat and drilled holes for the LED legs in them, using a 0.75mm drill bit in a pin chuck, and glued the LEDs on with gluper sue. Then I bent the leads 90° back towards the mast and drilled 0.75mm holes horizontally into the mast so I could literally 'plug' the lamp bracket complete with LED straight in and glue it down. Painted matt black the leads become invisible, as in 3rd pic above😉 Winch: at least your version of the model seems to HAVE a winch! Or where did those two pics come from? Mine ain't got nuffink, just a big 'ole at the back of the cabin😭 All the best, Doug 😎
Not necessarily Bubble, By correctly programming the ESC for a soft start and a not too aggressive acceleration curve you can tame brushless at low speed and stop 'em leaping ahead like scalded cats! Worked fine on my Sea Scout upgrade. Even adjusting the motor timing can help with the fine tuning. Cheers, Doug 😎
IN THE BEGINNING there was what looked like a pile of rust😲 which got soaked in WD40 for 24 hours! After washing off with warm water and washing-up liquid, and drying in the sun for a few hours, the bearings (and copper wire brushes) were oiled, missing connecting links bridged, and 6V (with current limit 3A set) was cautiously applied. Lo and behold she rattled and protested BUT RAN! Oh! That nostalgic smell of ozone, and enough sparks to read a book by🤔 Next connections were changed, to separate field and armature coils (brush gear), and connected to a standard brushed motor ESC (Graupner Navy 30A) via my prototype converter board, and a Robbe Servo Tester to simulate TX and RX. lo and behold chapter 2; she ran forwards and backwards😊 and no sparks! Now dismantled (last 3 pics) to start clean up and replacement of corroded parts. Sorry Col, I broked your motor😁😁 Armature was cleaned up and commutator polished; surprisingly lots of 'meat' on it so motor has not been run much. Next stop; lathe to make some new frame spacers. After that new bearing bushes cos the old Paxolin end plates have worn so that there's about 1/32" slop! Will probably have to turn the drive shaft down from original 1/4" (6.35mm) to 5mm to remove last traces of rust and pitting. Cheers All, Doug 😎