I wonder if there is any spec/quality differences between the present Retro Hawk short shafts and long shafts except for the length of endbell side of motor shaft.
The can of long shaft motor is still engraved 7Rs?
Haruki
Recent JK Retro Hawk 'long shaft' motor
Started by
usadar
, Feb 26 2020 07:31 PM
10 replies to this topic
#1
usadar
-
- Subscriber
-
- 1,216 posts Joined: 12-January 10
Checkered Flag in Hand
- Gender:Male
- Location:Tokyo; Japan
Posted 26 February 2020 - 07:31 PM
I have been using JK 9R short shaft Retro Hawks for a couple of years for IRRA Retro racing.
I wonder if there is any spec/quality differences between the present Retro Hawk short shafts and long shafts except for the length of endbell side of motor shaft.
The can of long shaft motor is still engraved 7Rs?
Haruki
I wonder if there is any spec/quality differences between the present Retro Hawk short shafts and long shafts except for the length of endbell side of motor shaft.
The can of long shaft motor is still engraved 7Rs?
Haruki
Haruki Kan
Retro Tokyo
Retro Tokyo
Retro Tokyo on Facebook
Where do we go from here: chaos or community?
Retro Tokyo
Retro Tokyo
Retro Tokyo on Facebook
Where do we go from here: chaos or community?
#2
Bryan Warmack
-
- Subscriber
-
- 4,686 posts Joined: 17-July 07
Posting Leader
- Gender:Male
Posted 27 February 2020 - 10:36 AM
Haruki,
The SCRRA has taken apart all versions of the Hawk Retro over the years and except for a few minor details, such as balancing procedures and the commutator wrapping, the motors are basically identical. Same wind, same magnets, etc.
- tonyp likes this
#3
JK Products
-
- Full Member
-
- 205 posts Joined: 12-December 15
On The Lead Lap
- Gender:Male
- Location:Carson City, NV
Posted 27 February 2020 - 05:10 PM
Bryan is correct, the only difference is the length of the shaft itself. Everything else is identical.
- Cheater likes this
Tim Homola
JK Products
#4
usadar
-
- Subscriber
-
- 1,216 posts Joined: 12-January 10
Checkered Flag in Hand
- Gender:Male
- Location:Tokyo; Japan
Posted 28 February 2020 - 04:35 AM
Both of the two versions (long/short) are the cans engraved 'RRRRRRRRR' (9Rs)?
Haruki Kan
Retro Tokyo
Retro Tokyo
Retro Tokyo on Facebook
Where do we go from here: chaos or community?
Retro Tokyo
Retro Tokyo
Retro Tokyo on Facebook
Where do we go from here: chaos or community?
#5
Bryan Warmack
-
- Subscriber
-
- 4,686 posts Joined: 17-July 07
Posting Leader
- Gender:Male
Posted 28 February 2020 - 10:40 AM
Haruki,
I have never seen a Hawk 9R with the longer endbell shaft.
I have never seen a Hawk 9R with the longer endbell shaft.
#6
JK Products
-
- Full Member
-
- 205 posts Joined: 12-December 15
On The Lead Lap
- Gender:Male
- Location:Carson City, NV
Posted 28 February 2020 - 12:09 PM
Here is what the M8 (long shaft Retro motor) looks like. Performance should be largely indistinguishable from the M28 short shaft motors.
7R 7R 7R 7R 7R
Tim Homola
JK Products
#7
Half Fast
-
- Subscriber
-
- 2,628 posts Joined: 02-May 07
Keeper Of Odd Knowledge
- Gender:Male
- Location:NYC, Long Island
Posted 28 February 2020 - 12:50 PM
Is the current long shaft Hawk Retro IRRA® approved for racing?
Cheers
Bill Botjer
Faster then, wiser now.
The most dangerous form of ignorance is not knowing that you don't know anything!
Never attribute to malice that which is adequately explained by stupidity
#8
MSwiss
-
- IRRA National Director
-
- 25,918 posts Joined: 16-April 06
Grand Champion Poster
- Gender:Male
Posted 28 February 2020 - 12:55 PM
Yes.
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
#9
bbr
-
- Full Member
-
- 2,433 posts Joined: 08-March 12
Posting Leader
- Gender:Male
- Location:LA
Posted 28 February 2020 - 05:37 PM
there was one batch (and I don't remember which) that had a higher % of "good" performing motors 
Mike Low
Cry like a baby, drive like a girl, walk like a man.
Give me enough rope and I'll build a fast car... or hang myself?
Cry like a baby, drive like a girl, walk like a man.
Give me enough rope and I'll build a fast car... or hang myself?
#10
Upfront slot cars
-
- Full Member
-
- 269 posts Joined: 05-March 13
On The Lead Lap
- Gender:Male
- Location:Nashville, TN
Posted 28 February 2020 - 05:57 PM
These are not the 2 speed motors ?
Andrew Ford
#11
Tim Wilkins
-
- Full Member
-
- 1,497 posts Joined: 22-February 13
- Gender:Male
- Location:Williamsport, PA
Posted 28 February 2020 - 05:58 PM
there was one batch (and I don't remember which) that had a higher % of "good" performing motors
A couple years back, an occasional R motor showed itself a little bit faster than the 7R motor. Today, the short shaft 9R motor has proven itself to be as fast as any batch of Retro Hawk motors ever produced based on track records that continue to be broken.
- Tim Neja, Pat Skeggs and Roy Lievanos like this
"If everything seems under control, you're not going fast enough" - Mario Andretti
