17 replies to this topic

[Bags]

Got a Mack chassis and installed a brushless 4500kv outrunner motor in it and this is what we got. Stayed cool the whole 400+ laps that were run in 1 hour with hardly any breaks. It was in the Orange lane.

[Bags]

[Modelville Guy]

What is a Mack chassis?

 

What else gets installed in the car or controller to make it work?

[Bags]

What is a Mack chassis?

 

What else gets installed in the car or controller to make it work?

Eurosport chassis used in the UK. 
 

It also gets a switch to make the brushless motor work with a slot car controller.

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[MSwiss]

Got a Mack chassis and installed a brushless 4500kv outrunner motor in it and this is what we got. Stayed cool the whole 400+ laps that were run in 1 hour with hardly any breaks. It was in the Orange lane.

Hardly any breaks in 1 hour?

Using the 3.47 median lap time, it should take less than 28 minutes to run 472 laps.

[Half Fast]

According to the specs on his motor it draws 29 Amps in continuous service. This seems absurdly high, and would blow up quite a few  controllers. . Tom please comment.

 

See here:

 

https://www.motionrc...-motor-mo026272

 

Cheers

[Bill Seitz]

I know Mr. Swiss has commented on these brushless motor forays into slot racing before, and I agree with his rationale. I don't see an advantage here with a more complex and possibly heavier setup that has more parts to fail. I don't know what track layout this is, but a 3.5 second lap time is not super fast. A mild-armed brushed motor also runs pretty cool for a long time, and there's no need to worry about any electronics to blow.

[MSwiss]

Bill,
Your link is to a different motor.

The specs show it with a 3MM shaft and 45MM long(over 1.75" inches)

[Half Fast]

Mike- OK but we need to wait to see what the actual motor is, but some Googling seem to indicate high amp draw for these motors. I can't believe they draw that much myself.

 

Cheers

[MSwiss]

I know Mr. Swiss has commented on these brushless motor forays into slot racing before, and I agree with his rationale. I don't see an advantage here with a more complex and possibly heavier setup that has more parts to fail. I don't know what track layout this is, but a 3.5 second lap time is not super fast. A mild-armed brushed motor also runs pretty cool for a long time, and there's no need to worry about any electronics to blow.

Blow?

 

I'm more concerned about the added complexity.

 

IE- having to figure out a way to add that switch, and have it protected where it will survive light to medium crashes.

 

As shown, that configuration is not raceable, even if Richard Mack added a transistor guard, like he already has a gear guard.

 

And still trying to figure out what problem it's solving.

 

The MFTS(Midwest Flat Track Series) just had an enduro in this area at another raceway.

 

They ran $12 handout motors for 192 minutes racing time(32 x 6 minute heats).

 

I was told the only teams that changed, was to try to find a faster motor.

[bbr]

At some point some engineer will design a proper circuit.

[Phil Smith]

And still trying to figure out what problem it's solving.

 

 

At some point some engineer will design a proper circuit.

 

But why? I think it's cool that it was done, but don't I see it as anything more than a neat experiment.

[Bags]

According to the specs on his motor it draws 29 Amps in continuous service. This seems absurdly high, and would blow up quite a few  controllers. . Tom please comment.

 

See here:

 

https://www.motionrc...-motor-mo026272

 

Cheers

 

The motor is an EMAX RS 1106 II 4500kv outrunner. It cost $10.99  on their website.

 

 

I started this post just to keep you fellas up to date with the testing that is going on. As far as going to the track and seeing how many laps it will turn in a given amount of time was not the point. This was a TEST session with a new chassis and motor. Temps were taken on the motor and the car was finished at the track that evening then tested for 40-45 minutes. 

[bbr]

Back in 90s an engineering friend decided to make a pwm controller. It worked but needed refinement.
Now, every serious slot racer uses some form of transistor controller.
Brushless may or may not have legs, but it is viable n who knows

[Zippity]

Tom

 

Ignore the naysayers. Keep reporting back with your findings

 

I'm sure that there is a lot more interest out here in the slot car world

 

Ron

[Eddie Fleming]

Interesting little car. 

 

I think if the parts were sorted out and available people would give it a try.

 

What if the motor and control board were mount together and that unit was mounted into the car in one unit like the current motors are? 

[MSwiss]

But why? I think it's cool that it was done, but don't I see it as anything more than a neat experiment.

I've said many times it's super-impressive Tom came up with the "switch" to run the brushless motor.

The motor is an EMAX RS 1106 II 4500kv outrunner. It cost $10.99  on their website.
 
 
I started this post just to keep you fellas up to date with the testing that is going on. As far as going to the track and seeing how many laps it will turn in a given amount of time was not the point. This was a TEST session with a new chassis and motor. Temps were taken on the motor and the car was finished at the track that evening then tested for 40-45 minutes.

Since you are using Slotblog as a free advertisement for your switch, EMAX brushless motors, and now Mack chassis, I don't think it's too much to ask that you provide accurate and complete info.

IOW, 40 minutes isn't an hour, and why show lap times if you aren't going to provide something real basic, like info about the track your testing is on.

[Phil Smith]

Richard Mack discussed his testing of his brushless motor chassis 8-10 weeks ago on his Facebook page if anyone is interested.

 

Russell Sheldon as well: https://www.facebook...22672200927136/

 

And here: https://www.facebook...02635463085407/

 

The idea just doesn't seem to be getting any traction. Maybe some day.