Why do some cars seem to brake much better than others. Similar motors but some cars seem to slam on the brakes while others seem to coast. Example, my Fly sidewinders hit the brakes hard when releasing the throttle, my newest Scalextric Cuda slows up a bit easier and my Monogram Greenwood Corvette just coast thru without stopping at all sometimes, the other times it does brake.
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Brakes, why do some work better?
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Some motors have tons of brakes whilst some have negligible brakes. Just because you have motors of similar types doesn't mean similar brakes. I presume motor magnets and armature winds have the biggest affect all else being equal.Kevan - Isle of Man
Life is like a box of Slot cars...🚓🚗🚚🚜
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Very briefly...
"Brakes" work by shorting the power back against the motor. It's basic physics....the current running through the wire on the armature creates a field that interacts with the magnets in the motor so when you short the power supply against that it "pushes" against the arm and slows the motor. Crude and inaccurate in the details, but that's the basic idea.
There are LOTS of variables. Magnet strength, armature wind, magnet spacing (air gap to the arm), spring tension, brush friction all play a part in the motor. And yes, friction in the drivetrain also matters. As does car weight.... heavier car takes longer to stop. And gear ratio also plays a part.
As does good contact with the track.....poor braid contact will impact braking as well as acceleration and top end.
So....hard to say, depending on the car and setup.Come Race at The Trace!
Timberline Trace International Raceway - SW of Mpls, MN
https://cults3d.com/en/users/chappyman662/creations
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Your comments suggest motor configuration matters. I have many Fly sidewinder cars and they do seem to coast/brake the same. My Monogram cars (Greenwood Vettes and Can Am cars) are inline and do coast well. Also, just because motors look alike doesn't mean they have the same internal characteristics.
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Originally posted by Michael Squier View PostWhy do some cars seem to brake much better than others. Similar motors but some cars seem to slam on the brakes while others seem to coast. Example, my Fly sidewinders hit the brakes hard when releasing the throttle, my newest Scalextric Cuda slows up a bit easier and my Monogram Greenwood Corvette just coast thru without stopping at all sometimes, the other times it does brake.
While adjusting the brake pot on your controller (assuming you have this feature on your controller) will certainly have an effect, there are many other factors involved (above ) in a cars braking capabilitiy.
Cheers
Chris WalkerLast edited by chrisguyw; November 2, 2021, 01:08 PM.
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Does motor placement affect braking? I have a Fly 911, that has the motor behind the back axel .And that thing literally skids and hops under braking.
That is the only slot car i have come across that has the motor in that location. Does anyone else own one of theses? and if so do u have the same brake performance?
john
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Originally posted by tracyridge View PostDoes motor placement affect braking? I have a Fly 911, that has the motor behind the back axel .And that thing literally skids and hops under braking.
That is the only slot car i have come across that has the motor in that location. Does anyone else own one of theses? and if so do u have the same brake performance?
john
I have built several "Rear motored" fly cars for club members/customers, and while the motor position does raise some handling issues, braking is not one of them.
This chassis was heavily modified to improve its longitudinal stiffness.......which caused axle tramping (the major issue with this chassis)
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