All cheap DC electric motors, and yes, fifty dollars is cheap, have the same problem - maybe one in a hundred is a lot better then the rest. Does not matter if it's made in America or China. That is the nature of the beast. Armatures made in the USA by ProSlot are probably better then the very cheap stuff made in China, but there is a plus and minus built into the winding machines that both use. and the timing on the comms used by Pro Slot varies; it's not even the same in every segment on the same comm most of the time. Even worse in the motors made in China.
Want a really good sealed motor all American made and exact in every spec. Then bust out your wallet and get ready to get off a hundred and fifty or more for each motor. THEN GUESS WHAT. They still will not be all the same. The more you pay the closer they get but even when you get up to open motors. THERE ARE STILL THOSE REALLY GOOD MOTORS.
This is a hobby or a sport, what ever you want to call it, where grown men race toy cars. You have a choice to race or not to race. You have a choice of what class or classes you run. In Retro you have a choice of what motor to run. If you don't like the choices, go fishing or play golf.
I plan on Racing retro cars and I plan on using Pro Slot and JK motors.
See you at the races,
Greg VanPeenen
what if a PD is found to have timing outside the 25 degrees +/- 3 degrees. Should all of them then be banned? I don't think so.
No, just the importer, manufacturer or rebuilder should be held accountable
Bob,
Like GVP alluded to in the topmost quote, you're expecting too much from a cheap electric motor.
A buck and a quarter or a buck and a half and you'll get something precise.
Want them all to run the same?
Expect $1K each, because only extensive track testing and tossing out motors will guarantee that.
This is cheap racing.
There isn't millions of dollars involved, thus no budget, for all the things you think should be implemented.
In your "World", there would have to be guys willing to be full time, unpaid, punching bags.
As far as this latest Retro Hawk nonsense, it's just that.
The TM BOD has always approved motors based on the realistic manufacturing capabilities of whatever company involved.
We added "nominal" to the timing description of all the motors because it was well apparent all Puppy Dogs were not 25 degrees.
Just today on Slot Talk, on FB, Ron Hershman posted;
The problem in most all motors is not the armature per say but the Set-up. Now in the Puppy Dog motors, the biggest variance in the motors is in the set-ups. The air gaps vary, the magnet strength varies, the alignment of oilites and brush hoods can vary. In the arms the timing can vary about 3 degrees on average,
One highly technical racer who has commented here today, who purchased 8 arms with another racer in the hopes of resurrecting some dud motors,
when he reads Ron's claim of "timing can vary about 3 degrees on average", I hope he doesn't blow his coffee, or whatever beverage, out of his nose
on to the keyboard. LOL
PS- and as Tex mentioned a few days ago and someone else alluded to, the TSR D3's and F7's don't all have exactly 65T.
The first one I dewound yesterday had 1 pole with 62 turns.
The 2nd motor did have 65 turns on all 3 poles.
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
Former IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder
17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)
Note: Send all USPS packages and mail to: 692 Citadel Drive, Westmont, Illinois 60559