is there much need for a better motor?

[JohnRobHolmes]

i am really not impressed with my lathe motors. they lack real power. if i can get the tires wedged without breaking parts, then i need more motor.

does anybody have the want for a better motor? something with better efficiency and more torque? maybe a 6 pole 540 with cobalt magnets? how about a more cost effective brushless?

i am not satisfied with the current choices, and i am going to do something about it for myself. would anybody else want a custom motor too? as a guesstimate the price would be around $50 hopefully. as a baseline i want at least 300 watts output.

[toyofast]

Have anyone tried the LRP Puller Motors?





Integy also shows two different 55-turn lathe motors, one shows a list of $19.99 and the other of $25.99.... what's the difference between these two?


I'd like to find something that is between the Integy 55-turn and the Kyosho MM... a motor that offers the goodness of both these motors, but packed into a 540 size can.

[JohnRobHolmes]

all of those motors have ceramic magnets. very poor excuses for a waste of space IMO. the availability of rare earth magnets as strong as N50 needs to be utilized in motors that bolt up to our crawlers. I think we should all give ROAR a round of applause for the past trend in motor development in RC cars.

so what you want is a motor with gobs of torque and slower rotational speed? thats what im talking about. a really powerful, efficient, controllable motor.

[toyofast]

Originally Posted by johnrobholmes

so what you want is a motor with gobs of torque and slower rotational speed? thats what im talking about. a really powerful, efficient, controllable motor.

True Dat! Most important is having the motor be controllable for low speed, can't have a jumpy/twitchy motor that cuts out when at slow rotations.

[AdamF]

If you could come up with a motor that has the torque and wheel speed of a mag mayhem, and the efficiency and run time of the lathe, then I'd buy it for $50.

[CustomCrawler]

Aren't cobalt drag motors over $200?

I'd love to see a 6 pole motor. Or atleast 5. Do they even make 5 or 6 pole motors in 540 or 550 can sizes? The smallest I've see for 6 poles is 750.

[JohnRobHolmes]

i am not aware of a 6 pole 540 or 550. the industry has been so controlled by roar legal motors that the variation has only come from the airplane and boat segments.

cobolt motors can be as cheap as 80 or 100 bucks. the magnets are the most expensive, being about half of the total cost. there is a 12 pole 550 at my LHS that came out of a boat. it looks so fatty and torqey. im gonna get a brushless for r&d first though.

in the long run, brushless is gonna be much cheaper to buy. the esc's are getting cheaper by the month, and its only a matter of time until 540 sized outrunner brushless hits the $50-60 range. right now there isnt many choices in that size can. remember back when the brushless for mini-T came out? it was all hack jobs until castle creations stepped up to the plate.

[Train Of Thought]

Have you looked at the cobalt motors from Astroflite?
Cheap, no. Torquey, yes.

The 05 size motor has a rating of 2125 rpm/volt.

...but no 1/8 output shaft.

What you are be looking for might include longer armatures, with magnets that are stronger, larger surface area brushes, and less than 55 turns (because the wire length will be longer).

Someone makes drop-in samarium cobalt magnets for 540 and 550 cans. I think even Trinity did a while back.

[MUD4FUN]

I only had a low budget for my truck so I used a cheap 550 mabuchi motor out of a cordless drill. The whole drill only cost me £15 in the UK!

I then fitted a graupner style reduction unit (£25) onto that giving me 65:1 overall gearing.

I left the torque ring on the motor and I run it with 8.4v packs (occasionally even 9.6v packs)

I get approx 1 hours run time (that is constant runtime) from a 2000 NiCD 8.4V pack. The motor is also only luke warm after an hour as well.

I'm running my 550 motor thru a Novak super rooster but really these motors are only pulling something like 1amp so could run on any cheap ESC. I just like the Novaks for their fine throttle control, braking and equal reverse power.

I get such long runtimes from my packs that I made up some custom saddle packs and they are tie wrapped onto the chassis rails. It is very rare that I need to swap them over as I can charge them in situ.

I'm now considering installing lipo packs with 4 times the capacity and also running an even smaller 480 sized motor but with even greater reduction gearing. Truck will be slower but will run for approx 4 hours off one charge. It will also reduce the CoG in my shafty as the 480 motor and lipo pack are less than half the weight of the 540/NiCD currently used which should improve my climbing ability.

[Trac95ker]

Try A Novak 5800. I use it. It has tons of torque. If I don't be careful, it'll break parts all day long. I have the brushless running through two Gd-600,s to take up some of the torque load put on the gears. Running Kongs with 1 lb. in each front tire. If the tire gets stuck,the motor will flir the truck or break a shaft. The motor won't shut off or lock up.

[AQTHF BIATCH]

intresting idea about the earth magnets

[Will]

i use a titan 550 motor (rebuilt) and couldn't be happier it has lots of tourqe and moderate speed kinda like a MM

[snakeman]

I have been seriously thinking about winding my own motors. I have lathes and they work good, I love the hour run times and the excellent control at low rpms but I just wish they were a bit "snappier" on the top end.

I've been reading up on brushless, but the cost is the only thing holding me back. !'ve already got the S/R, and lathes are only $20...... But if I could buy 1 motor that could do the job of 2 lathes, I'd spend $50 as long as reliability would be there too.

[jason]

I know nothing about motors, but couldn't we just take a 55 turn apart and take 10 raps off each side, and end up with a 45 turn?

[JohnRobHolmes]

if you took some winds off you would get a bigger air gap, which makes the motor loose effeciency and torque. it would spin a bit faster.

instead of making my own nicer brushed motor, i am testing out brushless motors now. they seem very promising with the castle creation controllers. i have two other schulze controllers and now i feel that they are $700 worth of crap. the programming sucks on the schulze.

i would rather go brushless than fool with trying to make better brushed motors any day. it is soooo much easier to custom make a brushless motor anyway.

[jwrape]

Originally Posted by toyofast

Integy also shows two different 55-turn lathe motors, one shows a list of $19.99 and the other of $25.99.... what's the difference between these two?

Difference is one has bearings and one has bushings.

[nd4spdbh]

well my 19 dollar integy motor hase bearings. so does the more expensive one have bushings??

[Jam1sstang]

Originally Posted by jason

I know nothing about motors, but couldn't we just take a 55 turn apart and take 10 raps off each side, and end up with a 45 turn?

Yes you could, But you would have to unwind 150 times from the poles (since its all 1 continuous wire) And then re-wind the 80 or so times and hope that the origional bare spots in the wires didnt touch anything. It would be easier to just take an armature from a Hot MOD motor and put it into a stock can. (could evebn rewind that if wanted)

Just my $.02

[Jam1sstang]

Originally Posted by jwrape

Difference is one has bearings and one has bushings.

I think the $26 one has bearings too. I know the description for the Matrix PRO ($20) says it has bushings But it HAS bearings. I have sold hundreds of them and they ALL had bearings.

[nd4spdbh]

lol and the 20 dollar one the matrix one says its a fixed timing motor but its not lol.