Coreless motors

[rosco01]

Not going to happen here either..... model railway decoders are 1/3rd of that price.... and they would do an awful lot more.

Let's see what Grant comes up with - I believe that coreless motor is going to set a new height bar. It may be a little too strong - it will launch in a 1/43rd model with virtually no weight... braking might be an issue... keenly waiting to learn of his findings..

 

frats,

Rosco

[ZeGas]

Well I did some testing on my $5 coreless motor last night and boy am I impressed.

I haven't crunched any numbers at all was just running around a loop scaley track.

To set the power level I ran my old 1:32 C1 corvette with rubber tyres that was used to a good result in the IPS a fair few years back.

Using a 6 car powerbase set to analogue and running the outside lane the power level was set to 75%.

Now I know this is a very short test track and the times would not fluctuate much but I was doing 2.2s laps with the C1, very consistently.

With only the prototype 1:43 chassis I was running, the times were consistently 2.05s, when I added the body it dropped to 2.25s, noted that the body was glued in place but only by 3 points and only a drop in each so it still had some flex but was by no means set up proper.

After half an hour of continuous running the motor was as cold as when I started, it was very torquey braked on a dime, the 7/20 gears would have helped as well, so much breaking I am going to try an 8/20 combo.

The car was extremely stable with no weight or magnet, the tyres although trued were not set to a specific diameter and there is about 2mm clearance under the car.

This meant that the motor, although it has a strong permanent magnet (will hold to the fridge) effect, it did not take to the track so there was no downforce other than chassis / motor weight (~35-40gms) and body interior weight (~15-20gms) total weight is 56gms, the urethane tyres & track were cleaned.

So impressed with it I am going to order more, I think there might be a future in this and sooooo cheap.

If anyone wants some testing done on it tell me what and I will see what I can do.

I haven't checked unloaded motor speed yet. Will do that in the coming days.

 

Video links

http://photos.app.goo.gl/mUMiyN9XZDQfRJig9

The end of this first video is it breaking to a full stop.

https://photos.app.goo.gl/dGL33Am8zLixVCZ48

 

Edited November 8, 2023 by ZeGas

[rosco01]

Thanks Grant - I was concerned there wouldn't be much braking... these little motors run so freely, I feared they wouldn't pull up quickly... but, obviously - such is not the case.

I knew you wouldn't be disappointed - great result.

I suspect the driveline mesh etc noise would not have paid tribute to just how quiet these little motors run.

Efficiency wise - you could probably run two in a 1/32nd model and not note any drop off ... 

Pokey little pocket sized electric motors with turbo's.... and so smooth and quiet...

so glad to learn they actually do have brakes.

Do my beady eyes spot a bottle of Diggers Shellite in the background? keen to learn what you use it for.

frats,

Rosco

[ZeGas]

Yep, shellite on track rails, track proper & for cleaning tyres.

Also starting fires 

[rosco01]

33 minutes ago, ZeGas said:

Yep, shellite on track rails, track proper & for cleaning tyres.

Also starting fires 

Thanks Grant... I believe I tried that once.. for some reason, I decided against it - but can't recall why.

I now use Isopropyl.... to clean... then run a dampened cloth with Inox over the rails to both lubricate and protect.

I had rusting issues with some of the track cleaners (and so called protectives).... after packing my gear away for the very long lay up times I have..... I have not had this issue since using Iso and Inox... and, the braids seem to last a lot longer and are easily cleaned.

 

Shellite is great for removing sticky backed lables... a favourite of mine, hence why I spotted it.

 

frats,

Rosco

[ZeGas]

The issue I have with Inox, although great for protecting the rails, is that its' residue stays for quite some time and makes the track slippery.

Shellite will not protect but cleans spectacularly and dries quick leaving a nice grippy track.

If storing for a while I will use Inox on the rails, but will then rinse clean with Shellite before reuse.

[rosco01]

4 minutes ago, ZeGas said:

The issue I have with Inox, although great for protecting the rails, is that its' residue stays for quite some time and makes the track slippery.

Shellite will not protect but cleans spectacularly and dries quick leaving a nice grippy track.

If storing for a while I will use Inox on the rails, but will then rinse clean with Shellite before reuse.

I should add, I overwipe the rails again after application with a clean/dry calico cloth.... this leaves the thinnest of a film on the rails... I do not apply it to the plastic track, and can appreciate that the passage of tyres over the rails will transfer "something" to the track... I don't know that I've had this issue.... and yes, when packing away - I give the rails a final coat.... and a light buff off.... no rust - works for me (so far).

 

As for the braid - one drop from a very fine needle applicator into the front of the braid.... it seeps through the braid, and I believe gives a little advantage in speed with the lubrication.. not much, but anything helps. I also find it tends to either correct or prevent dodgy track connections between rails.... no idea why, I don't believe this stuff is conductive - but heck, I'm no chemist.. 

 

frats,

Rosco

frats,

Rosco

[kalbfellp]

Shellite is used often to remove built up rubber and goo from commercial tracks.

Even on club tracks it is great for getting any build up of rubber off the track surface.

It will be interesting to see one of these motors running in a club racing environment to see how they compare.

 

[ZeGas]

Phil, I don't club race myself, too remote, but once I have nutted out the final design, not prototype I'd be happy to provide one for scrutiny.

I'm looking at 1:43 at the moment as I am lacking space for a 1:32 track, it is cheaper and there is a bit of experimenting to do.

I was going to throw one of the motors into an IPS car as a direct comparison between the BWA & these.

Also I have a classic 1:32 Maserati open wheeler I made a start on years ago and I thought it would be good for that too.

Heaps of testing & prototyping ahead.

[mtpanorama]

Watching this with interest, I have an Airfix Sprite kit that could probably use a small chassis and motor like this.

Nice work.

[ZeGas]

Finally got round to testing motor speed.

6v 9,800

9v 14,500

12v 19,400

Pretty happy with that.