We been discussing motors for a beginner's class at Bristol 1010.2. Wondering what the RPM spec is for the JK Hawk 7. Never saw any RPM spec for the JK motors.
Hawk 7 RPM rating?
#1
Posted 22 June 2024 - 05:33 PM
#2
Posted 22 June 2024 - 06:05 PM
You just have to Google it.
Note, RPM rating can be deceiving.
My CR102 is listed at 40,000 RPM but it certainly runs with the Hawk 7 because of its massive torque and ability to use a much larger pinion.
On my Wednesday night racing I allow the CR102, MA Retro Eagle, MA Eagle, JK Hawk Retro, or JK Hawk 7.
- SpeedyNH and John Luongo like this
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
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
#3
Posted 23 June 2024 - 08:20 AM
Motor RPM is also directly related to track voltage. A 48,000 RPM motor will run differently on a track with 12 volts than on one with 16 volts. Buy a really good motor, regardless of what the RPM rating is, and adjust the voltage untill everyone feels comfortable. In any slot racing event or series, there will be a wide ranging level of talent. Some guys are going to want more motor, some will be happy with what is provided.
- Ramcatlarry, Eddie Fleming and John Luongo like this
#4
Posted 23 June 2024 - 12:08 PM
Thank you everyone for the information.
#5
Posted 23 June 2024 - 05:18 PM
#6
Posted 24 June 2024 - 10:47 AM
The Hawk 7 in my opinion is, well, a waste of money. Very inconsistent and very poor quality!
Bob
- Danny Zona likes this
#7
Posted 24 June 2024 - 11:52 AM
The Hawk 7 in my opinion is, well, a waste of money. Very inconsistent and very poor quality!
Bob
I would agree with that, but I will note that JK has recently changed owners. I hope the new owner is more successful in maintaining quality and consistency than the previous owner. Time will tell.
#8
Posted 24 June 2024 - 07:12 PM
I've had reasonable service from Hawk 7 motors not experiencing any of the inconsistent performance that's been subject of enough words already. This motor has ceramic magnets, not a strong magnetic field, but better for cars and tracks with sensitive handling. When the later motors arrived with poly neo and solid neo magnets, the Hawk 7 was out-classed (still is despite often being listed as a comparable motor). When racers tried gearing the Hawk 7 more aggressively as could be done with the poly and solid neo motors, and to try to remain competitive with the new competition, the Hawk 7 was generally run overloaded which did it no good at all. I think it's not so much that the motor was bad, but that it became outclassed with newer entries in the market. It isn't equivalent to anything but itself, despite class rules that might indicate otherwise.
#9
Posted 24 June 2024 - 07:24 PM
I'm about 95% sure the Hawk 7 has poly-neo magnets.
Mike Swiss
Inventor of the Low CG guide flag 4/20/18
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
#10
Posted 24 June 2024 - 08:23 PM
It does, I tried zapping one once and it killed the magnets, just like you would expect from poly neos with a regular ceramic zapper.
- MSwiss likes this
#11
Posted 05 July 2024 - 11:51 AM
RPM rating has no relation to how fast a motor is under load at track voltage .
Specify what the winding is that has meaning
#12
Posted 05 July 2024 - 11:58 AM
Timing is important too.
I intend to live forever! So far, so good.