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>> Home > Tags > 540 motor

540 motor
brushed motor
brushless motor
johnson motor
motor cooler
motor mount
reversing motors
torpedo 850 motor
torpedo motor
twin motor
540 motor
Which motor by Colin H. Fleet Admiral!   Posted: 5 days 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.

What Li-po? by Yngvegr Seaman   Posted: 2 months ago
I have been away from this hobby for a long time, but got inspired to get this garage-sale find running. It is a Graupner Commodore, 1970's motor yacht, 70 cm long. It came with all radio, motors, batteries and all, everything works, except the batteries are really old. So I am thinking about replacing the batteries with Li-pos, but what size should I have? The motors in the boat are 2 Mabuchi 540s. Are there problems running brushed motors with Li-pos? Thankful for all advice! :)

For Sale - Pilot ll from plans by Vic Smeed by cormorant Fleet Admiral!   Posted: 5 months ago
For Sale. Plank on frame wooden hull scratch built from original plans by Vic Smeed. 86cm L by 28cm B. She is very well made, though I can't claim for construction as I bought her part built. I re-painted, added the drive train and electrics as well as detailing the the deck house and upper deck. Twin brushed fanned 540 electric motors with Mtronics Viper Marine 20amp ESCs. 2.4ghz Tx with four channel receiver. Navigation lights and searchlight. (Need final wiring) I think she looks good on the water. Collection only please. £210 ONO.

(2) COMPLETE MERCRUISER HP500 540 BULLDOG MOTORS by Dave M Fleet Admiral!   Posted: 6 months ago
This is for a full size boat engine. Aquawm is no longer a registered member. Please do not post any further replies to this post.

(2) COMPLETE MERCRUISER HP500 540 BULLDOG MOTORS by figtree7nts Fleet Admiral!   Posted: 6 months ago
Just imagine the size of the model! How do you get that to the pod!

(2) COMPLETE MERCRUISER HP500 540 BULLDOG MOTORS by Colin H. Fleet Admiral!   Posted: 6 months ago
A bit big for most models.

huntsman 46 by canabus Fleet Admiral!   Posted: 8 months ago
Hi Pilot If you are using 540 can size (35-36mm brushless motor) a 3639-1100kv 800watts, 3648-1450 1600watts or a XK 3674-1900 1769 watts. All run on 100Amp ESCs, but check the maximum voltage they handle. I use car ESCs with the electric fan on top because they run cooler at slow speeds and no water plumbing required. The same with the motors no cooling. Props for these motors 37mm 2 blade or 40-45 mm 2 blade. If you go for a larger motor for a larger prop, a L5055-700kv 1600watts same ESC, but, start with a 2 blade prop about 52mm. Battery a 3-6S 5800mah or more with a C rating of 40 plus. I have used the 35mm motors in 34 to 40" boats, but, for my 46" Vosper Crash Tender I am going to the 5055. To large a prop will cause over heating of the ESC, battery and Motor. A in line amp meter(Hobbyking 9598000004-0) is the one in use. It reads the maximum amps, so for run speed amps slow speed up to maximum as a hit the throttle hard will give you maximum amps. Canabus

Sarah Jane by bilzin Commander   Posted: 8 months ago
House clearance rescue. 30" length 540 motor Will have 2.4ghz and 2s lipo when refurbished

Motor problem by RichardSReade Sub-Lieutenant   Posted: 8 months ago
the motor has arrived today so into the workshop this afternoon, of course it is not going to be straightforward, the motor is much larger than the 540 size so the motor platform is too high. I fixed it down well, I did not want this to come loose, managed to cut it out with one of those vibrating cutter, just leaving the glued pieces to remove , not too difficult with a small wood chisel. So in the process of making a motor platform with new stringers so the platform is lower in the hull, break for tea, now going in to workshop to fix down the stringers to the hull and bulkheads with 2 part epoxy, The motor mount has been fixed to the platform with small nuts and bolts with a locking washer, I am going to epoxy the heads to the underside of the platform, so I can undo the nuts without the bolt spinning, not sure how I will fix the platform in as there is not much depth on the stringers to use screws, so I guess two part epoxy again. Should I start a blog as I think this may be an ongoing tale of woe😊

Motor problem by jarvo Fleet Admiral!   Posted: 9 months ago
Hi Richard, Good morning, Prop first, if the blade to hub is 30mm, it is a 60mm diameter prop, think of the circle of sweep, twice the size that your 550 motor can take. As the shaft is free running, we can discount drag, simply the motor working to extreme, so we need to prop down considerably, If you are staying with the 540 motor in the pics, a 35mm 3 blade prop is the maximum, a rough guide is no bigger than the motor diameter. I would save myself a lot of problems in the future and fit a larger motor, Canabus is right a watt meter will save its readings so you can get a proper idea what the motor is doing. I would swing towards the 850, or the 700. Not expensive but safe to run with a smaller prop. The 700 might fit your mounting but the 850 will need a new one, usually supplied in the box. The Sea Commander will serve you well as a great sailing model, once you are past the teething problems. Just looked back, your first post said the hull was built in the 60's, it might have a 4ba thread, not many ba props available these days, a 4mm prop will fit but it will be tight, don't forget the locking nut (to many props at the bottom of the lake) also a thrust washer to protect the motor bearings. Mark

Motor problem by RichardSReade Sub-Lieutenant   Posted: 9 months ago
Hi reilly4 I do not think it is as large as 60mm as it is a three bladed prop, if it was a two bladed one I would agree with you as the blades would be directly opposite each other hence 60mm, but being 3 bladed they are not 90 degrees to the centre point, without taking it off and drawing a circle around it to measure I would hazard a guess it is a 30mm prop. If memory serves me correctly the late Swindon Model Shop which was run by Yan who knew his stuff recommended the 540 motor along with the prop for the size of the boat. I will check the Sea Commander plans as I think it has the size of the required prop listed. Haverlock the motor is rated 4.5 to 15 volts and the battery is 7.2 volt, I would have to run the boat in water to see what the motor is drawing under load, I may get a tad wet trying to keep up with it to read an amp meter, or sink the boat by sitting on it😉 I think the overheat problem was to do with the motor mounting braket covering the front air slots on the motor. However I have a water scoop which I did not fit at the time of building so may retro fit and buy a new motor set up for water cooling, the next question would be where abouts do I fit it?

Motor problem by RichardSReade Sub-Lieutenant   Posted: 9 months ago
After reading your post Jarvo I went out to the workshop to check if the motor would run, it had got so hot it had melted the solder on the live feed connection so in a way saving it from going right up in smoke, an inline fuse may be a thing in the future, the motor is completely burnt out however the power box is OK. Thank you for the information about the larger motor, I am not sure which is the larger out of the two, I have posted some photos of them both as I am not up to speed with the rating numbers of the motors,maybe you could answer that question. However following up from Scout13 reply, although the cover over the prop shaft connection was in no way restricting air flow, ( I will drill some air flow holes in the cover to be 100% positive on that statement. The motor fixing bracket and the RE540/1 motor recommended for the Sea Commander and sold to me by the model shop, (I was given the other motor by a club member as I was informed it was the better out of the two) looks like the problem, if you look at the photo's you can see that the air flow holes are completely blanked out by the bracket, something I missed when fitting it.

Motor problem by jarvo Fleet Admiral!   Posted: 9 months ago
Hi Richard, as an extra to Dave M. the battery packs are different sizes, 5000mah and 3300mah, if both batteries are connected together they will cause problems with power balance, as said the cooling slots are covered. You said the motor was cooking, have you tried it since? maybe it was the ESC that cut out through the overloading with the prop to big. PS what size prop is fitted? The 540 in the 4th pic may not be big enough, a 600 size or even an 850 would give a lot more torque and probably more speed, you can back off the throttle but a small motor will always struggle, and will probably be run at near full power a lot of the time. Hope this helps Mark

Dirty Deeds by Krampus Admiral   Posted: 12 months ago
Thank you, AllenA! Well, no science behind the running time. As long as I run at low speeds it just happens everything seems fine. But when I put the throttle down... then all is over within 15 minutes or so. I pretty much stick to the same power layout. 540 motors with 30A controllers, 2000 or higher mAh capacity and 35mm or 40mm props and 4mm shafts. Dirty Deeds is a bit special. I was on my learning curve (I'm still there!) so due to a novice error I used a 2mm shaft so I had to get a special propeller and a big mean battery (kind of a Viagra approach). So, I had a 4-bladed 35mm propeller bored for the 2mm shaft and a 10.8v 4000 mah battery pack. A bit in the heavy side but it gave the boat nice stability. I can achieve better running time with Lipos, but I'm an old-fashioned guy still concerned with the maintenance Lipos involve and do appreciate a bit more of the weight offered by NIHMs, not to mention I'm a cheap guy (LOL). Something that really worked for me is the choice of propellers. I noticed a remarkable run-time difference between plastic and metal (yes, more expensive) propellers, but it is well-spent money. Other boats I have run with 9.8v 2000 mAH batteries achieving almost 50 min at low speeds, which is OK with some of my models for realistic ride purposes. Here I have my two "inspirational" pics.

Dirty Deeds by Krampus Admiral   Posted: 12 months ago
Some pics of my favorite build. Made on a barebones fiberglass hull. Runs with a NIHM 10.8 battery, a 540 brushed motor and a 30A controller. Pictures taken by the Olympia Park pond in Munich, Germany.