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 (23)
Login or Register
To Remove This Ad

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

motor
540 motor
brushed motor
brushless motor
johnson motor
motor cooler
motor mount
reversing motors
torpedo 850 motor
torpedo motor
twin motor
motor
Which motor by Helineil Chief Petty Officer   Posted: 3 hours ago
Hi Ed and Colin, thanks for your promp replies in helping me decide. Ihad sort of come to the same conclusion but reassurance from experienced sailors is always welcome. Iwill put an order in to cornwall models tomorrow morning. Cheers. Neil . Live long and prosper.

Which motor by Colin H. Fleet Admiral!   Posted: 4 hours ago
Hi Neil I have a 49inch tug which uses a 540 motor with 2.5 to 1 reduction box. 3inch 4 blade prop, On 12 volts pushes along nicely and with a 7amp hour battery gives about 2 hours sailing, total sailing weight is 21 kilos. Cheers Colin.

Which motor by figtree7nts Fleet Admiral!   Posted: 4 hours ago
Hi Neil, I use MFA/ComoDrill Torpedo 500. On my Tugs and they have enough power! I use the 2.5:1 g/box at 12 volts. It gives about 13350 rpm's http://www.mfacomodrills.com/gearboxes/918d_series.html Cheers, Ed

Hull Pt2: Motorisation - Come What May!! by RNinMunich Fleet Admiral!   Posted: 5 hours ago
Fits like the proverbial glove Martin 👍 My new split dies and holders have arrived so I should be OK now for the re-shafting on my HMS Belfast and Graf Spee😊 Cheers, Doug 😎

Which motor by Helineil Chief Petty Officer   Posted: 7 hours ago
Could someone advise on which motor to use in a smit amsterdam tug of approx 40 ins long with a 4 blade 3 ins dia. Prop and 4 mm. shaft, I want to run on 12v sealed lead acid battery. I am not going to tow anything but would still like a bit of power. Cheers. Neil.

Hull Pt2: Motorisation - Come What May!! by Westquay Fleet Admiral!   Posted: 8 hours ago
So glad the shaft and tube worked, Doug. Martin

Hull Pt2: Motorisation - Come What May!! by RNinMunich Fleet Admiral!   Posted: 9 hours ago
Thanks Ron, the learning curve is steep but I'm getting there 😉

Hull Pt2: Motorisation - Come What May!! by kmbcsecretary Fleet Admiral!   Posted: 10 hours ago
Excellent workmanship there Doug coming along nicely.

Hull Pt2: Motorisation - Come What May!! by RNinMunich Fleet Admiral!   Posted: 21 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! 😲

Gina 2 Billing Boats Fish Cutter - Restoration & Conversion by RNinMunich Fleet Admiral!   Posted: 23 hours ago
Evenin' Mike, guess you're right 🤔 Bit of a departure for me I admit, and after I'd cleaned all the crud off and realised how shoddy and weak the hull was I wondered if I'd bitten off more than I can chew😲 However progress has been made😊 I hate to be beaten! See next update 'Motorisation - Come What May!' You'll recognise the topic from the discussion on dies and threading silver steel prop shafts😉 I'm multiplexing this project with a PTB renovation and refit! Like most boat modellers 'a glutton for punishment'. Cheers, Doug 😎

a bit more done by Steve-Teresa Sub-Lieutenant   Posted: 1 day ago
Yes, I know what your saying about needing weight, I have yet to find out just how much, however I am intending to run it from a 12v7a sla, and with two good size motors, so hopefully I shouldn't need to add to much if any, the original hull design is supposed to have a curve right around the bottom, this proved to be unstable and would need even more weight, so I cut it of and made it a flat bottom. I only wanted to make a recovery boat for break-down's, this seemed like the idea solution, but I think I am getting a little carried away with it other than just "bunging it together".

Motor upgrade by Nobby-Clark Petty Officer   Posted: 1 day ago
Guys, hi I came down to hartsholme today to trial run the build and was made extremely welcome thanks greatly. Er motor widthThe motors are T4A from mobile marine they were extremely hot so prop size adjustment is needed. I am building again this time an inshore mine sweeper I have 50 mm graupner props on at the moment and am looking for a pair of motors to run off 12v LAB with 15 amp speed controllers per motor but cooler with out going to big I have 50mm per motor width allowance and 70mm length. I would like to keep up speed as inshore sweepers were fairly nippy 20knots real time. Is there any recommendations please ,apart from rebuild again. Regards Nobby

Vosper Rescue -target towing launch by Manofkent Seaman   Posted: 1 day ago
I have built this from the plans as per instructions using the balsa/ply fixing with UHU Hart and it works well and the boat performs well. Had to source fittings etc from many places and those I couldn't (DF cone) I 3d printed. Use a small geared motor from component shop to power the radar scanner.

Vosper Rescue -target towing launch by boaty Captain   Posted: 3 days ago
I understand the Veron RTTL kit was first sold around the late 1950s , early 60s. I got a boxed unbuilt one in 1995 from a local model shop whom had taken it in as part ex for another boat. I decided to build it instead of keeping it boxed as a collectors item. It was a nice lightweight boat which I powered with a brushed 550 motor running off a 7.2 Ni Cad. I held onto it for a couple of years before trading it in the same shop where I bought it for a fast electric kit. With hindsight, I feel I should have kept the RTTL as they are very rare classic models now. Boaty😁

BRAVE BORDERER by RNinMunich Fleet Admiral!   Posted: 4 days ago
Bon chance mon ami👍 Don't know what TX you have but you may be able to do the mixing there. If not there are several separate mixer boards on the market. This one for instance; Action Electronics P40D from Component Shop. It's good for both brushed and brushless motors😊 See pdf data sheet. Mode 1 might be good for Brave Borderer!? http://www.action-electronics.co.uk/Mixers.html https://www.componentshop.co.uk/p40e-marine- style='background-color:yellow;'>motor-mixer.html Have fun, cheers, Doug 😎