While walking through the RC market in Bangkok with Matt Ryder(Aurora) and Mike Wasp I took a snap of this pile. You can see the small cylindrical motors...possibly the same as mentioned above. You could have bought one for very small amount off this seller....but I didn't.
Post by Andrew Rowland on Jan 27, 2016 4:50:21 GMT -5
The problem, as far as I understand it of course, is torque. A year or so ago I bought one of those £10 RC helicopters. That tiny motor wizzed round real fast with just a tiny battery to power it and the helicopter flew very well. However I believe that powering a plastic rotating blade with only the air to push against is a bit different from powering a car along a track.
It would make a fun experiment and for those who don't need speed it could open up conversions that otherwise couldn't be done but otherwise unless one can convince a group to go down that route is not likely to catch on in my opinion!
As exemplified by Munter's photo, there are piles of motors in the Bangkok RC market. Some of the motors can be difficult to identify. Sometimes I'll purchase a few, without knowing anything about them, just to try them out.
These two are probably the most interesting I've found recently. Both are from the Mitsumi M15N-3 series. They are 0.5mm longer than an FF-030. The other physical dimensions are the same, as is the mounting hole pattern. The photo shows two different versions: M15N-3 R-A205 with the blue label M15N-3 R-A204 with the white label The white A204 revs higher than the blue A205.
These motors have a rated voltage of 8.0 volts, with a range of 6.0-28.0 volts.
They have carbon brushes. The shaft diameter is 1.5 mm. Mitsumi indicates the application for this motor is "Scanner". I suppose they are used for trains and other DIY projects as I did find a train shop selling them online.
I use Mineabea S can motors in 143 scale builds. S stands for square. They have a 6 pole armature and four magnets in the can. According to the manufacturer they are a patented design and produce twice the torque. They are 8 mm X 8mm X 20mm. Turn 16K at 12 volts and have 50gm/cm of torque with good braking characteristics. I have run these motors for hours at 12 volts and they do not even get warm.
By far the best motor I have found for use in small slot cars. It actually has decent braking, which so many of these smaller motors don't have. The 16 K at 12 volts is also perfect, again most of these small can motors are designed to run on 3 volts, but when they are run at 9 volts or above they are turning insane RPMs 30K+ and no brakes!!!!
This Minebea performs more like an NC1 in a very small package
I bought them from a surplus warehouse in China. I bought 130 at a very reasonable price. Minebea is a big Japanense company that I did contact over these motors because they are really nice, and I was wondering about a long time supply.They were only interested in talking to me if I was wanting thousands. They are avialable and they put me in contact with there NA distributor for retail supply. They wanted $25.00 each!!!!!!. So I guess I got lucky, but some of these Hong Kong ebay shops get some good stuff in. I just bought 14 Avant chassis for $10 each. Aluminum rear wheels, Orange Long can( 21 K 300 gm/cm) and aluminum spurs. The parts alone are worth more then that.
I have a digital Tach and can measure the torque as well on these surplus motors, so I don't mind taking a chance when I find some
I have a bunch of the Mitsumi motors discussed in this thread and these Minebea are a much better motor with really good braking resulting in better laptimes.( on my track)
I have one running in a TA proxy running against Scalextrics 21K motors. It is way off the pace of the front runners but it is not running last which is saying something when you look at the size of these things.