1:43 Lancia 037 - Coreless motor

[ZeGas]

Hi all,

After querying a few months back whether anyone has tried coreless motors before I got more and more curious.

I was also curious about being able to make a 1:43 car that would be able to compete with a tuned 1:32. In other words a competitive 1:43 race car, not a modified toy car.

So over the past few months I have experimented with that idea and after a number of iterations and improvements have completed a ground up build of a Lancia 037 that I hope is quite competitive.

Now, I'm not the worlds greatest slot car driver but using myself as the driver to compare between cars I think it will at least be apples and apples.

So onwards....

• The chassis, pod & wheels are all my own design and are 3D printed in resin.
• The body is off the WWW and is 3D printed in resin, file modified to add body mounts.
• The tyres are my own urethane compound and are shore A25. I tried A35, A30 & A27, am about to try A20
• Motor is coreless rated at 12v with no load at 18k, tested with no load this particular one was 17k so not bad.
• Guide is Slotting Plus universal.
• Pod is suspended with soft springs
• Gears are nylon 8/15.
• Axles 2mm, rear is flanged ball bearing.
• Front end height adjustable
• suspended height is also adjustable by about 1.5mm which obviously alters the suspension as well soft to hard.

I probably should have cleaned it a bit before I took some photos.

The results on a Scalextric track coated with Cabots polyurethane are quite impressive. The track has one set of every radius curve and a wobbly bit.

Initial results on the 20m track were in the mid 8's, by the time I improved and tuned they were down to a constant 10 lap average of 7.1 with fastest laps at 6.8.

To compare, the latest Scaley Torana with magnets is doing 10 lap average 6.2 and a tuned Slot.it 956 10 lap average 6.8-6.9.

It is very smooth and quiet to drive but does lack a bit of torque so braking isn't dead stop, but I like that personally.

Conclusion is that I think it is possible to create a 1:43 scale race car.

[Vinno]

That’s impressive. I didn’t read if you have a magnet in the car like the Scaley Torana. If not even more impressive. 

[ZeGas]

No mag Vinno, just a little Tungsten weight around and behind the motor. About 3g from memory.

[ZeGas]

Well it gets better, I altered my tyre compound, redesigned and fitted a custom guide and shortened the gears.

The tryes are trued but not glued so you can see gaps around the rim and a slight tear.

Now pulling a best lap of 6.188 and a 10 laps average of 6.36 seconds.

Cannot believe what I am getting out of this.

This was a quick setup as well, cannot wait to set some new tryes on it, and true & glue them this time.

This one under a Stratos body.

 

[Vinno]

The chassis looks like it has a nice low centre of gravity.