31 replies to this topic

[bbr]

[Half Fast]

Mike

 

Any more info?

 

Cheers

[bbr]

No, just found this post by R Mack.
Game changer?

[Revtor]

I think this was discussed a year or so ago, and the general consensus seemed to be extra weight for no real advantage.
May be cool as a class in its own, Im sure there is some tweaking possibilities with that speed control and tuning etc. You just feed the track full power and use an RC controller to run the thing.

[Half Fast]

This does not look particularly heavy

 

Cheers

[John Streisguth]

That would be interesting, being able to stand anywhere around the track instead of being stuck at a crowded control panel.

[bbr]

The tech has been driven by the rc drone hobby. The radio gear is very lightweight now, and the price is low. Will be fun to see how it pans out for slot racing.
Airtonics, Futaba controllers and motors that never wears out, laptop tuning of speed controller.

Second channel for active air control?
Digital type racing with lane changing?

[Bags]

If that is a sensor less brushless motor I have the switch to make it work off of track power with a slot car controller. Wonder what it weighs?

[gotboostedvr6]

Maximum switching rpm might be an issue.

[gotboostedvr6]

Poles in a 3 phase brushless motor refer to the total number of magnets, not the stator teeth like a brushed motor.

2 pole motor is typically limited to 160k rpm, 4 pole 80k,6 pole 60k, 8 pole 40k ect.

That brushless outrunner motor is likely between 6 and 14 poles

[Bags]

Here is a fully functional brushless road course car. With this setup you use the standard resistor controller. No R/C controller, no hot track and the braking system works.

Attached Images

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[bbr]

here we go, some hardware to try:

 

 

[MSwiss]

I ran the picture by someone who knows quite a bit about brushless motors

Their reply;
"It looks like an outer rotor brushless motor.  I doubt that it would work well at all.  It wouldnt be able to run at very slow speeds, when you let off there will be a delay before it will respond (because it is sensorless and needs to go through a starting routine each time you let off of the controller completely, also being outer rotor it will not start or stop very fast due to the high inertia.

I think it would be slow, also not very smooth."

[gotboostedvr6]

Once it's moving the starting procedure will not occur again until you stop. 

[gshdralph]

Here is a fully functional brushless road course car. With this setup you use the standard resistor controller. No R/C controller, no hot track and the braking system works.

How much does this car weigh?

[MSwiss]

IIRC, he said the whole setup, (motor, "switch", and wires) weighs 60 grams.

Here's the thread;

http://slotblog.net/...y/?fromsearch=1

[crazyphysicsteacher]

Once it's moving the starting procedure will not occur again until you stop. 

Um, so every track call or time some idiot falls off in front it would need to restart. That would be pretty often for some classes.

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[Phil Smith]

Do RC cars, planes, quads, etc. suffer from these issues? I don't know but I can't imagine that they do.

[dickytenkids]

the car (my one ) weighs less than my 1/24 eurosport (4 grams ) its as fast speed wise ,but have only run it on full rc gear ,i need one of your switches to run it as i want with a normal hand controller . to run it as it is now will need a fair bit of esc setup its very twitchy ,will need soft start and brakes will need backing off as it stops dead ,all stuff a normal hand controller can handle ,and the startup bleeping evertime it stops is infuriating

[Phil Smith]

Hey Richard, the link in your signature  doesn't work. http://www.mackslotracing.co.uk/

[bbr]

Richard,
So what are the hardwares you are using?
Motor
Esc
Receiver

I am looking at using this

[MSwiss]

Interesting.

Any lap time comparison?

Assuming you don't have any video, could explain start up "bleeping", in more detail, for us not familiar with these motors?

[dickytenkids]

havnt been on here for a few years ,website should get going again soon 

motor is sunnysky 1106 8000kv motor ,20 amp micro esc and frsky micro reciver 

will post when ive got something better going 

guessing it will be somewhere between open 12 and eurosport speed 

i think the handling may loose out as the motor is not spinning as fast as a brushed slot motor thats running 8-1 gearing 

[dickytenkids]

if power is cut the motor has to go through a procedure to start again ,its sort of a safety feature to help not getting your fingers chopped off by the propellers,with bags system this doesnt happen only put this together to see if the motor would be fast enough.

[Phil Smith]

havnt been on here for a few years ,website should get going again soon

 

This link works: http://www.mackslotracing.co.uk/ Your sig has http://www.mackslotracing.com