SlotForum banner

NSR Mosler friction system

3388 Views 31 Replies 18 Participants Last post by  tamar.nelwan
Last week I had a competition at my place with a friend and as usual we eventually compete with the NSR Moslers.
Usually I can beat his timing but when we raced with the Moslers he beated me and destroyed my previous record.
When he offer me to test his Moslers I took down the record half second!
We both thought we were just in our best mood.
The day after I tested it again and went down even more but I felt the motor was spinning at full revs as soon as I exit the curves without any spinning of the wheels.
Yes, the gear was loose! So I tighten it and tested the car. No way I could get near the new record! So the answer was plain, with the right friction in the gear the car could exit the curves with earlier full throttle and benefitting full torque as soon the grip between the shaft and gear was restored and that happens without wheel spinning.
I tested 1000 laps with different cars and when setting the right torque to the hex screws it works a wonder and it last for a long time!
The setting works perfectly with the Moslers with Ultragrip tyres. The cars are literally glued to the track.
I have a PWM controller but I cannot get anywhere near the benefit of this mechanical friction.

Is the above something anyone has already tested?
Is it allowed to run like this in the clubs?

Three lane track 60ft
Voltage 11V
Truspeed PWM controller
NSR Mosler AW with medium suspension springs
King 21 Evo
Ultragrip tyres
Air wheels NSR

Lap timing
Old record: 5,447s
New record: 4,986s

In conclusion, this is off course an empirical and rough system but you get fantastic results. Has anyone produced a real friction system with decent results?

See less See more
1 - 1 of 32 Posts
There is problem is getting repeatable consistent slip.
In my experience, gear slip gets worse with use. Sometimes it'll loose drive all together within a lap or two, sometimes it'll go on in "controlled slip" for quite a lot longer. Sometimes the "controlled slip" phase can be made to last longer by accelerating gently and backing off the brakes - a tactic I've seen used occasional near the end of a race when the driver decides that'll waste less time than taking the car off and tightening the grub screw.

Electronic adjustments in the controller are repeatable / consistent and adjustable at the turn of a knob. The commonly used choke adjustment (or what some makers call "traction control") has a somewhat similar effect.

QUOTE (JamieG @ 5 Jan 2012, 09:18) <{POST_SNAPBACK}>... while with a mechanical friction system you increase the revs of the motor much faster and when the gear get the grip, the motor is in the point of the curve of max torque.
The result is to have a bullet car exiting the curves with the motor screaming.
Generally motors have maximum torque at stall (zero rpm) and the torque decreases as the rpm increase, so there must be an alternative explanation of the effect.
See less See more
1 - 1 of 32 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.