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>> Home > Tags > brushed

brushed
brushed motor
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brushed
Krick Police Launch by MouldBuilder Lieutenant   Posted: 1 day ago
I have just started to build the Police Launch that I have had for a while. Work commitments have left me with little time lately but hopefully I can get a good run on this one for a while. I hope to finish it by late July which just leaves me enough time to send it to Hungary so that I can test it. The kit is said to be good for a beginner. This would be good as many years ago I built a Patrol Torpedo Boat which took me five years. I am currently restoring this one as well but I think that will take most of this year to complete.😁 I have started by buying the speed controller. The motor is a 400 brushed. Probably not going to be too difficult to keep up with this one. The kit itself is not too bad considering the price, but I do feel that the ABS vacuum formed hull could be of a slightly better quality. Also I am finding the ply wood to be rather brittle. Does anybody have an idea for a good filler to use to fill the chips which will take to acrylic paint. I have prepared the hull and added the propeller shaft and rudder holes. Care taken here to avoid splits in the plastic. Cellotape on both sides before drilling helps.🤓 I have assembled the internal parts which hold the motor, battery and rudder and also fitted the prop shaft.😲 I will start on the deck and superstructure next. An additional note about the kit. The instructions are reasonable but they are in black and white which is not helpful considering they are photograph based with text. I found a PDF on the web which is in full colour. Why don`t Krick supply this. Surely not that expensive.🤔

S 100 Schnellboot RC build by boaty Commander   Posted: 6 days ago
I have a liking for Italeri kits myself. Built the Vosper MTB in 2011 then the PT 109 a few years later. They really perform well either with single or triple props. Both of mine have 480 brushed motors, single props, and 2s Lipo 2200mAh. Ideal for small ponds where you can maintain scale speeds and if easy on the throttle you can have a decent endurance before the battery goes flat. Boaty😁

Fibreglass the hull by mturpin013 Fleet Admiral!   Posted: 14 days 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

More running in at Bournville. by RNinMunich Fleet Admiral!   Posted: 19 days ago
I had understood that this was an 'old motor'. Could have meant decades! Quote: "old Brushed motors MFA850" But an extra .047 across the terminals won't hurt. Re: Fail Safe; a common problem as 99% of sets are pre-programmed for the Fly boys. First thing I do with a new set is delete all the presets for fixed wing / Heli and reprogramme to do what I want and on the stick, switch or knob that I want. Throttle Fail Safe on a plane is often equivalent to throttle stick right back since plane ESCs don't go in reverse the motor just stops. Can have some interesting effects on a boat ESC with reverse though !!!😲 Happy Trialling 😎

More running in at Bournville. by RNinMunich Fleet Admiral!   Posted: 20 days ago
Hi Novagsi0, From the video and pics I see two problems! 1. Ship the fenders before sailing. They seem to be throwing water up onto and into cabin and cockpit. 😆 Bad practice to sail with fenders out anyway. 'Just not done old chap' 😉 2. You have a brushed motor and no spark suppression so it can create interference with the receiver and may also directly affect the ESC. Look here for info on motor suppression. https://model-boats.com/rc/motors/suppression Cheers Doug 😎 PS: think maybe you should raise the coaming around the deck access as well! Making it as tight a fit as possible.

CB90 by CB90 Commander   Posted: 25 days ago
CB90 Model boat, 52 inches long performing 360 degree rotation on its own axis. The Combat Boat 90 (CB90) is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet. Powered by two 9.6v Graupner 700 turbo motors (no-longer in production). Two Mtroniks Viper Marine 25 is a Brushed Speed Control designed specifically for use in RC model boats, it has a 25Amp motor limit and has proportional forwards and reverse functions

MAS 562 update by CB90 Commander   Posted: 25 days ago
Skinned the frames added deck and splash rail also started on cabin and superstructure, added rudder and installed twin brushed Graupner 600 motors via Graupner style direct couplings. Motor mounting system through a bulkhead gives extra support to motors which mount on to end of the shafts. currently adding a rudder servo mount, as rudder is a close copy of the real boat's and still functional.

First run for 2018 by Novagsi0 Captain   Posted: 1 month ago
It wasn't my best video because of trying to do it my self and control the model. I will try again after moving the motor back a bit. Few people perhaps interested in the performance of these old Brushed motors MFA850 so I will do it.

RAF Fireboat (vintage) Aero by CB90 Commander   Posted: 1 month ago
[Score: 9/10] 34"/2500g RAF Fireboat (vintage) Aero Capable of 12mph and a runtime of 40mins Single Propellor (2 Blade X Type 45mm) Direct Drive to a Bullet 30 (2 Blade X Type) Powered by LiPoly (11.1v) 5Amp/h Batteries Controlled Through 24v 15A Electronize (15Amps) ESC - Comments: Ebay job £50 Old Vintage Aero kit 34in Fire boat needing a lot of attention, with delaminating plywood, old glue, old glow-plug engine mounts with electric conversion, and after removing a metal shield I discover an vintage (1970,s Ripmax Bullet 30 Motor the dogs bollocks of electric racing of its time capable of running 24v at 15A. 300W for a brushed motor. Started by revamp rear pit by lowering servo and rudder and building sub deck, storage lockers, tow hook and ladders. Remount the motor with an aluminium mount with custom screw positions. Block windows with 1mm ply. Foam front half of hull to make unsinkable. Make centre decking area. Repair and build up on cabin roofs and walls to centre deck. Rewire add ESC and servo. Remove broken and unusable fittings such as large vents, some missing unable to match again. Problems with old gloss paint crazing the modern spay paints. Build some fittings eg Water cannons, life belts, Build new battery trays, Painting the boat now in progress as of 20/04/2018 Boat has be roughly painted but is not finished, as fittings are now required, added a RC system an gave it a test run. the performance was adequate on 14.4v and great on 17.2v see latter pictures on the pond. the motor did get hot after about half hour of use. the motor is rated at 24v but I think a smaller prop will be required for that voltage. Excellent performance from a brushed motor. Added some stickers and I have now added a 12v fan and ventilation between cabins as the motor required some cooling and was in a sealed compartment.

H.M.S. BRAVE BORDERER by reilly4 Captain   Posted: 1 month ago
Hi Rowen, I have had water cooling on all my patrol boats running at 12Volts, whether brushed or now brushless. For the brushed motors I have used aluminium tube coils with water pickups between the propellers and rudders. I did try water jackets a couple of times but found too much friction loss and therefore lack of flow. For the newer brushless outrunners I use a brass tube soldered to a brass plate across the front of the motor fitted between it and motor mounting bracket. I agree with Doug with regards to the disconnection of the red wires on the ESC's. This is now common practice, especially if you have an external receiver battery.

Re: Donnieboy's Gina 2 by RNinMunich Fleet Admiral!   Posted: 2 months ago
Amazing! That is exactly the boat I inherited from an Aunt last year. Took me months to find out what it was. Originally I thought it was a Kentish boat, cos our family hails from East Kent (Folkestone area) and Aunt Beryl often painted fishing boats along the Kent coast. Eventually I discovered that she was based in Ebsjerg in Denmark, hence the E in the registration. Shame yours has been deactivated 🤔 I'm going to try to renovate mine and fit it with a 60's Taycol Target which I have modded to run forwards and backwards from a standard brushed ESC. Your pics will help, thanks 👍 Cheers, Doug 😎

Hacker-trinity by BigAlio Commander   Posted: 2 months ago
Hi guys new ebay purchase listed as bare hull only when it arrived it came with full fitting set and speed 600 brushed motor. bought it because of paint job and for some fast electric fun all for just £24.00 should go well with brushless set up.

Propeller for brushless by CB90 Commander   Posted: 2 months ago
Thanks Cannabis, for the information I have noticed that brushless motors seem to run better on smaller propellers. than brushed direct drive.

Motor Mounted! by RNinMunich Fleet Admiral!   Posted: 2 months ago
Sorry Ed, I was pullin' your leg a little 😉 Date of Manufacture and 'On Time' or 'Operating Hours' are terms I remember from my time working on naval ships and other MIL STD equipment! But your question is nevertheless relevant to brushed motors in models👍Basically I wouldn't expect a max current of 2A to stress the brushes of your motor very much. And for that price I would expect that the commutator would be well machined thus minimising the brush wear as it switches from one segment to the next. I trust that you got the quality that you paid for😉 Therefore you should get many hundreds of hours of use out of your brushes! Simply check now n again how much 'meat' they have left and if the commutator shows signs of wear, burning or grooves from the brushes. Or do you want me to do a MIL-HDBK-217F Reliability and MTBF Analysis? 😲 He He, ask Dumas if they did one, that'll throw 'em 😁 Cheers Doug 😎

Aerokits Solent Lifeboat by olly49 Chief Petty Officer   Posted: 2 months ago
I have a problem with choosing the motors for this boat. The lifeboat I built in the early eighties and upto today it had 2 x Deceperms fitted(6volt). One of these now as developed a fault and it is far too expensive to buy a new one,soI have decided to go down the route of fitting a couple of MFA850's only to discover that these love the amps and thus could burn my P94 ESC. I would like to stay on the brushed side as I have the techobots sound generatormand this connects to the P94. So which motors should I choose?