All donations are securely managed through PayPal. Amounts donated are not published online.
Many thanks for your kind support.
Model Boats Website Team
February 2019: 8 people January 2019: 16 people December 2018: 6 people November 2018: 11 people October 2018: 9 people September 2018: 13 people August 2018: 5 people July 2018: 8 people June 2018: 8 people May 2018: 7 people April 2018: 9 people
Thanks John, that's what I was thinking of trying, finally getting my head around the details of the mixing at source. I have another old futaba set with mixing as well, which I used for a Lancaster and found that by controlling ort and starboard motors via mixing made it a really stable flyer. Just hope it will work as well on my boats as I have a couple of fast launches with twin motors to get restored and back on the water. Thanks for all the help from everyone and especially you and Dodgy. Cheers Colin
Looking at the stern of the boat and you have 2 rudders. The port prop should be counter clockwise and the starboard one clockwise.If you have only one rudder then the port is clockwise and the starboard one is counter clockwise.
Two days ago I put what I hope is the final paint on the hull, hatch and misc. parts. I like to let it sit for several days to cure, especially in cooler weather. I took the time to work out LED navigational lighting for my Brooklyn Tug and got that installed. I will photograph that tug later. Back to the springer tug, I had difficulty finding a good mounting spot for the starboard and port lighting so I decided to raise it on a light bar. Photos show the styrene structure in progress which will have the green and red side lights and a single white light on the top center post. Worked out the resistor values to reduce current and work off of my 6 volt supply, then soldered as shown. Fed the assembled LEDs through the plastic rectangular tunnel I created. The one photo I took with the red LED turned on is so bright that the camera just picked up a bright spot. I may have to reduce brightness but will test out in daylight first.... These LEDs are very bright and are 360 degree view! Ordered from "superbrigntleds.com" in order to get the full 360 as the ones at the local store were very limited to 18 to 60 degrees. Ordered red, green and white and they arrivedin about four days, great service. I have used this company several times and am happy with them, good to know. More to come, Joe
Because I am keen to conceal as much of the wiring as possible I have decided to place the battery at the bow and the operational equipment at the stern, the engine on the original boat was central and covered with a soundproof box and this is convenient as the motor can be positioned and concealed in the same way. This means that some of the wires will have to run the full length of the boat and the easiest way to conceal them is to run them beneath the ‘box’ around which the hull is formed, and this needs to be done before the bottom skins are fitted. Holes were bored through the bulkhead formers under the port side of the hull and battery cables were run to the stern where the ESC will be and three motor wires from the ESC run to the centre, emerging near the motor position. For good measure I put in a servo cable and a separate draw wire just in case I needed to put more cabling in for any additional features, perhaps working navigation lights? Satisfied that I had all the cabling in place I was able to fit the bottom skins starting with the starboard side first. Before doing so I put a very slight 'hollow' in former F1 which should help blend the shape of the the hull where the ply skins meet the balsa blocks that will to be carved and shaped to form the bow. This can be seen in the last picture. The process of forming and fixing the skins is the same as for the side skins but in addition to the pins holding the skins in place I used some brown polythene ‘packing tape’ to pull the skins tightly against the bulkhead formers and strakes. The packing tape has a very high tensile strength and is ideal for this, and of course cheap and easy to remove. Once the aliphatic glue had set thoroughly overnight I removed the excess from the skins with a small block plane and finished them with my sanding plate. Before I fit the skin at the stern I will have to arrange the water cooling for the ESC, with the pickup just behind the prop and the outlet on the stern. I’ll cover that aspect in the next update.
The side skins are made from 1.5mm ply and require a slight curve towards the bow and I found that this is best achieved by gently warming with a heat gun, which seems to relax the glue between the laminations, so that when bent to a gentle curve and allowed to cool will set the shape very easily. The skins are supplied are slightly oversize and when the skins have been bent they can be roughly clamped to the hull and then marked for trimming, also while the skin is clamped in place the positions of the bulkhead formers can be marked on the skin. Back on the bench the skins were trimmed with a craft knife (with a fresh blade) and then drilled with a 1mm bit to allow pinning through into the formers and strakes. Aliphatic glue was applied to the hull formers and strakes and the skin positioned so that the drilled holes were in correct alignment with the formers and then clamped and pinned in place. Because the skin was pre-formed to the hull shape the clamps and pins are not under much tension and the hull was set aside while the glue set. When the port skin had fully set overnight, the pins and clamps were removed and the skin was finished with a plane to remove the excess down to the strakes and the F1 former at the bow and the sanding ‘plate’ used to finish it all off. Where the side skins meet at the prow there needs to be a wide flat area for the external keel to butt to and so the trimming and sanding there will be done at a later stage before the bow blocks are fitted and carved. The process was repeated for the starboard side skin and while the glue was setting I gave some thought to a means of concealing some of the wiring that needs to run the length of the hull 🤔.
Hi Steve, What went wrong? 😲 1. Drawing on deck planking, i.e. on a veneer or thin ply- Why/how did it go wrong? Surely since the planks are all 'parallel curves' all you need to do is make a curve template in plasticard from the plan. Then at a few strategic points along the plank length mark the widths of the planks. Set the template along these points and 'Bob's yer Uncle - Fanny's yer Aunt' 😉 Mind you; doing it that way the 'curious grain of the planks' would betray the fiddle🤔 2. 'what type of strip wood - Any very close grained type. Possible source- http://www.slecuk.com/index.html 3. How to glue it!? Any thin, spreadable waterproof wood glue! 4. Gap? Max 0.5mm perhaps. Ca 10 to 1 ratio. 5. 'How do you secure the bent planks whilst the glue dries? Modelling pins at strategic points along the plank. Assumes planks are pre-shaped by steaming!! See 6. 😉 6. 'Do I need to steam the planks? - YES! As mentioned above; make a template defining the curve required. From this make a jig of ca 5mm x 10mm in which you can set the steamed planks to cool and set to the shape required. To allow for the so called 'spring back' make the jig with a slightly sharper curve than the actual deck curve. When fitting the planks to the deck it's easier to 'push them out' than to try to increase the curvature. Finally; mark on the deck base the plank widths at strategic points along the plank length as alignment points. Glue planks alternately left/right (OK port/starboard😉) using modelling pins to hold in place until the glue is fully cured. For the 'gaps' There are various solutions in Build Blogs on this site. One that I like is the use of thin black card. When the whole deck is planked and properly cured sand lightly (ca 240 grit). 7. 'weathered teak' there are various suppliers of teak stain and also deck weathering stains; e.g. Jotika stain, Lifecolor Washes for Hulls and Wooden Decks, set part no. LP04, which includes Wooden deck darkener and Shadower, amongst other useful weathering pigments. http://www.astromodel.it Google Lifecolor and you'll surely find some UK distributors. Enough answers for enough questions!? 😁 Hope this provides some inspiration, Cheers, Doug 😎
Has anyone done any significant modifications to a Thunder Tiger Avanti fast electric? I have one and all I have done is to replace the nylon prop with a metal one thus there is very little increase in performance and the reason for doing this was due to the nylon prop throwing a blade after striking an underwater object. Prestwich Model Boats have a suitable replacement motor complete with a better ESC than the existing Ace one and their system can handle up to 4S Lipos instead of the stock set up of 3s . I have located a source of a 4S Lipo which length and width is same as my 3S one but the height is a little more and it will fit into the battery box. To trim it out properly I would have to add some ballast to the starboard side. Due to the electrics including the battery all being in a small watertight box at the stern there is not a great amount of scope for a lot of mods. Boaty😁
Hi, I'm doing some (a lot) of research before embarking on a Bristol Pilot build. My attention has now turned to controlling the twin fore sails. A helpful guy at my club mentioned using a 'mixer'. Anyone who has controlled two foresails and/or a genoa on a racing yacht may have some ideas here - any welcome. But my initial question is about terminology. Reading my Futaba handbook - a truly excellent translation 😡- I find two terms under the mixer section - 'OFS' and 'VR' - any idea what they mean? For interest, the problem is that the front sail overlaps the rear 'foresail' so we can not simply attach a sheet to the front sail to drag it to a 'tight' position as this may tangle with the rear foresail. The second problem is that if the foresail is out to the port, the drum winch must turn anticlockwise to haul it in, whereas when it is to starboard the winch must turn clockwise. I do love these problems, but desperately need help. If its only someone telling me not to be stupid and just lket the foresail hang loose - I'm not racing afterall👍 Sam
Hi Peter. It shouldn't need ballasting very much if at all. As I won't be able to adjust the position of any heavy components I'll use small pieces of lead to adjust fore/aft and port/starboard trim. Robbob.
Hi all for the second blog report on the schnellboot I am going to go over the rudder a propeller shaft assembly in more detail. The first stage was to make the rudders which were made of brass ,and having taken note of what has been said about the increase in size needed for the kit by other members I have increased the size of the rudders by 50% so that they have more effect and hopefully the boat will be more agile .I fitted 3mm treaded rod on to the rudder and in a 4mm flanged tube to reinforce the brass rod. The second stage was to make and fit 5mm flanged tube in the location for the rudders in the boat, these were made to be above the water line and will be sealed in place to reduce the possibility of leaks. These were fitted to a rudder platform inside the boat which was fitted to the kit moulding for the rubbing strip that runs the length on the boat and secured by making resin blocks which were fitted with computer extension nuts. which were then superglue in place to secure the rudder platform. The rudders were then fitted in place and held in position with the tiller collars which were made from 8mm rod and fitted the tiller arms and locked in place with 3mm computer screws and ni-lock nuts, a connecting plate was then fitted to connect the three tillers together, I also fitted rubberised washers to seal the rudder tubes. The third stage was to make the propeller supports. The centre support was a direct copy of the kit part made of brass and fitted to the kit with a plate and screws (this plate and the rudder plate were made from galvanised steel) and will sealed with resin after the I test the boat for leaks. The port and starboard supports were made by taking the kit parts and cutting them in have along the joint line or mould seam this gave me a template ,which I used to make cross-section segments but I did alter the template by increasing the boss diameter to 10mm and extending the support legs so that the finished support could be fitted through the hull (the picture of these show the mk1 version where I forgot to allow for the 4mm prop shaft which has a 6mm tube) any way the boss of these segments were drilled out with a 7mm drill and a length of 7mm brass tube fitted through the boss to assemble the segments, all of which were coated in soldering flux at this stage of the assembly which were riveted at both ends to hold it all together during soldering, after soldering the supports were then filed to the size and shape to resemble the kit parts as close as possible and fitted to the hull using a superglue and talcum powder mix and then I cast resin around the extensions to secure the prop supports in place. The fourth stage is the propeller shaft housing for the centre propeller housing I place a brass rod in a plastic straw and place in position in hull and using resin I sealed the hull with the rod in place this gave me a pilot hole for the centre prop shaft after I removed the brass rod. For the port and starboard shafts I used the kit parts which had hole place when assembled, this when I reinforced the housings ,the centre housing I glue 2mm of plasticard on each side and for the port and starboard I made a brass tube shroud which covered the housings which left gaps between the kit part and the brass which was filled by casting resin in the gap this increased the diameter to 10 mm so that there were little chance of breaking throw with the drill and finished these off by fill-in the outside with body filler and sanded to shape and finish . I then drilled through the pilot hole in the housings using very long extended drills and a wheel brace ( if I had use a power drill the heat would have melted the plastic of the kit and may have caused problems) I drill the shaft housings out 6mm them filed them out with 6mm file so that I could insert a length of 6mm brass tube. After all this was done I fitted a flanged bush made from 7mm tube and 2mm brass plate turned to 11mm to the ends or the propeller shaft housings. And now it is time I must ask for some help could anyone advise me on the length of propeller shafts, I know I can use a 300mm shaft for the centre shaft, but port and starboard will have to be longer. and I also need advice on selecting the motors, I want to use 4mm prop shaft with 35mm propellers. Any opinions welcome.
Hi, Doug. I’ve attached a zoomed-in photo of the “Anchor Enclosure” that’s built into the starboard bow bulwark of the Wyeforce. There’s an anchor in the box but I can’t tell for sure what kind it is. Maybe a navy-type with the fluke & bill pointed inward toward the deck? A better photo is needed to be sure, so I’ll keep looking. The enclosure itself would be simple to build & fit to the hull. I remember seeing a photo of the boat’s foredeck area that showed what may have been a hawse pipe running inboard from behind anchor enclosure & down through the deck, presumably to a winch belowdecks? Does that make sense? Pete
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.
Been researching the squeal and stutter on other websites and conclude RFI is probably not the major contributor. Others attribute it to a mismatch in the ESC / motor timing, which seems more likely. Whatever caused it, resulted in the affected motor failing. Which came first, the failure causing squeal or squeal causing failure is open to conjecture. Much to my surprise the manufacturer has decided to replace the motor under warranty. In the meantime, the motors I had planned to use originally (2800kV Outrunners) came into stock, so purchased a couple. Until now have had to use the ESC default settings as did not have a programming card. This also arrived with the motors. Following advice from another contributor reprogrammed the motors with “softer” start and acceleration settings. Fitted and tried the new motors and settings. On the bench, the squeal and stutter have almost gone. The motors are also more tractable. As the brushless motors are now going to be used for high speed operation only, with slow on the centre brushed, thought could simplify the controls by putting the brushless ESCs on one control system using a “Y” lead. However, this introduced inconsistent and erratic motor responses. Reverted to the two previous separate controls, port and starboard. On the water the performance is fine, as is the reliability. The 2S battery gave almost half an hours operation. The bow lifts nicely with both 2 & 3 S Batteries; plenty of spray. Hopefully resembling a 50 knot vessel! Another adjustment is needed to the transom flaps to try to hold the bow down later as she accelerates. Feeling now to finally be making progress with this model. The squeal has not gone, nor has erratic motor operation. The squeal is high pitched screech, rather like treading on a budgie! When it happens, bringing the control back to neutral and advancing it again almost always overcomes it. The erratic operation happens also when starting and is rather like the motors are not getting a signal to react to the control. Again, returning through neutral briefly seems to correct it. The revised motors and ESCs have increased the weight to 6lbs for the hull including all running gear, excluding batteries and superstructure. Whilst still trying to control weight have concluded this figure is satisfactory as the performance certainly is.
Decided to separate the two power systems; one to the port ESC and motor and the other the starboard. Hope this will reduce interference between the motor systems. Have also reverted to a remote battery powered Rx rather than the BECC system, again to reduce possible interference. The modifications did not resolve the problems. The squeal and stutter are still present, but much reduced. Sounds rather like a slipping coupling, but as these have been checked many times they can be eliminated. Apart from the squeal and the stutter, everything works well. The squeal /stutter occurs at start up, when it happens the control is returned to neutral, If the motor is immediately reselected, usually the problem goes away and the motor runs up cleanly. It only occurs when both motors are selected at the same time. Either runs up cleanly when selected individually. Interestingly enough, did some research on various Model Boats site and found some references to RF interference, no specific solutions though. Also examined some Aero modeling sites as they use powerful brushless motors with ESCs. There is some history of the problem there. Evidently when the mosfets (?) of the ESCs convert DC to AC, RF interference is generated. It can often be addressed by using ferrite rings on the ESC control leads. My latest ESCs actually have ferrite rings, so the problem must have been anticipated. This might account for the latest reduction in squeal and stutter levels. Am at a loss to think of any other modifications, so decided to conduct a water test. Maybe it is a characteristic of brushless motors, but their control response seems “ragged”, not smooth as with a brushed. Anyway, the squeal and stutter seemed reduced yet again, perhaps the water load damped them down. Was able to start exploring both the performance envelope and the viability of the brushed centre shaft motor. First impressions are that on a 2S battery the performance is fine, but it sparkles on 3S. On 3S the stutter and squeal are more pronounced though. Intend to do further trials but, unless something unexpected occurs, now plan to use 2S power. The centre brushed motor idea works well, this layout seems a good compromise. Will design a simple switching circuit to ensure the brushless motors can selected separately. This will avoid the inadvertent operation of both brushed and brushless unintentionally as they are on the same control stick. The brushed can then be used for low speed operation. Returning to the problem of squeal and stutter – has anybody else experienced this and how was it resolved?