new 19t ROAR class
02-23-2004, 06:20 PM
#1
Tech Champion
Thread Starter
new 19t ROAR class
ROAR Announces 19T stock class
Coming under the heading of "it's about time," ROAR has finally recognized the popular 19T fixed timing motors as the foundation of the super stock class.
27-turn stock motors date back to the very beginning of stock racing when there was 1000 and 1200 mAh batteries. Modern batteries are now pushing the 3500 mAh mark, but until now, we've been stuck with the often under-powered 27T stock motors. This new class is sure to create some renewed excitement. The 19T motors are much more powerful, which will make stock racing much more about driving and much less about motor tweaking, dyno testing and expensive high-voltage battery packs.
The following is the updated rules as posted on the ROAR website: http://www.roarracing.com/
5-48: Motors submitted for approval as rebuildable 19T “Super Stock” motors must have the manufacturer’s name in the form of “XXXX 19” (e.g. EPIC 19, YOK 19, etc.) permanently stamped into the mounting face of the motor can. “XXXX 19” designates the use of the can for 19T “Super Stock” class racing. The manufacturer name on the can will make hybrid motors easy to identify. Any deliberate violation of this rule will be cause to remove all motors of that manufacturer from the approved motor list for a minimum of one year. All motors submitted for approval shall be freely commercially available at a retail price of less than $50.
5-49: All ROAR rebuildable 19T “Super Stock” motors may be either bearing- or bushing-type with an endbell that locks the timing at 24 degrees. The space between the magnets must be centered on one set of mounting holes, which will be marked on one side of the can to indicate zero degrees. The brush hoods will be aligned at 90 degrees from this mark, plus up to 24 degrees of timing. Only single piece (2 magnets in a can) ceramic magnets are allowed. No Rare Earth or Cobalt magnets permitted. The center of each magnet must be 90 degrees from the 0 degree timing mark on the can. Offsetting magnets with the intent of increasing motor performance/timing is not allowed. Any deliberate violation of this rule will be cause to remove all motors of that manufacturer from the approved motor list for a minimum of one year.
5-50: Endbell and can must be designed with a method of locking the timing at 24 degrees. This feature is in addition to any method which secures the endbell to the can (e.g., screws running through the side of the can). The endbell must incorporate a molded tab that keys into a slot on the can — locking the timing at 24 degrees. Endbell timing may only be set at 24 degrees. Extra locking devices (e.g., extra notches in the motor can that allow timing to be changed to 36 degrees or 5 degrees) are not allowed.
5-51: Endbell may have inspection/cooling holes on each side between the negative and positive terminals. These holes would facilitate inspection of commutator tabs. Endbells must be marked with manufacturer’s name.
5-52: The brush configuration can be of any type as long as that configuration appears on a ROAR approved modified or stock motor.
5-53: Motor can must have inspection holes/slots between magnet tips so that the armature may be viewed for inspection of armature tag (see 5-57). These holes/slots may be no closer than .220” from the top or bottom edge of the motor can. View through inspection holes/slots must not be obstructed by anything covering the holes/slots (e.g. motor label).
5-54: Magnets must be permanently glued to the motor can and may not be removed. No magnet shims are allowed (e.g., an extra shim that could be added on the end of the magnet or between the tips to change performance). Flux collector/timing rings are allowed as long as their only purpose is to secure the endbell to the motor can.
5-55: Rebuildable 19T “Super Stock” motor armatures must be machine-wound using a cross wrap technique. The legal 19T “Super Stock” wind is a minimum of 1170mm of round 19 AWG (American Wire Gauge) wire, having a maximum wire diameter (including insulation) of .914mm, resulting in no less than 19 continuous turns of wire on each pole. There is no tolerance on the minimum length of wire, nor is there a plus tolerance allowed on the wire diameter.
5-56: Tabs on the armature’s commutator may only be “compression welded”. No after-market welding or silver brazing will be permitted. All Commutators must be locked to the armature laminations to prevent timing changes.
5-57: Commutator slots must be aligned with the center of the individual poles. Full stack armatures made only of magnetizable material. No modifications to the stacks will be allowed other than the normal drill balance holes. Any modifications to the original OEM Importer/Manufacturer configurations, including but not limited to, excessive drill holes/milling/turning to lighten and/or enhance the performance from that of the full stack will not be allowed. No linear separations of the stack segments will be allowed.
5-58: No split, skewed or tri-rotor armatures will be allowed. Minimum armature stack length is 21.3 mm. Vertical slots will not be allowed on any armature manufactured by the original OEM Importer after January 1, 2002. Vertical slots on all armatures manufactured prior to January 1, 2002 will not be modified from the original configuration as manufactured by the original OEM Importer. At no time will any material be removed from the armature, whether hidden or visible, except those from normal balance holes.
5-59: The crowns on armature pole segments must be symmetrical with a constant radius. They may not have any steps on them or longitudinal holes through them.
5-60: Armature must be tagged in a way that it is easy to identify both in and out of the motor. The tag must be permanently affixed to the armature and made of materials that will not self destruct from the heat of the motor or standard motor cleaning agents. The tag should be positioned between two poles of the armature and must be a minimum of .500” in length. The tag must be printed with the OEM manufacturer’s name and “19” (e.g., “EPIC 19”, “YOK 19”, etc.).
5-61: Armature shaft must extend .125” beyond the endbell bushing when motor is assembled. The overall length of the armature shaft should be 2.775” with .385” extending beyond the end of the commutator. The commutator end of armature shaft must have a machined “step” that differs from the standard radius or taper currently used by OEM manufacturers in production of other stock or modified motors. The step should continue for a minimum of .060” from the end of the shaft.
5-62: No modifications to the physical construction of the motor can, endbell, or armature will be permitted (e.g. adding or removing material from the armature stack, changing the brush hoods from the original manufacturer’s configuration, relocating spring posts). If a motor shows signs of tampering during post race inspection, the driver will receive no score for that qual or main.
5-63: Epoxy balancing of armatures for rebuildable 19T “Super Stock” motors will not be permitted. No more than 2 holes on any 2 poles of the armature are allowed, i.e. no more than one hole on the third pole.
5-64: The armature, motor can, and endbell of a rebuildable 19T “Super Stock” motor must all be from the same motor manufacturer and can contain only components from the same model. No hybrid motors or mixing of parts from different models will be permitted.
Coming under the heading of "it's about time," ROAR has finally recognized the popular 19T fixed timing motors as the foundation of the super stock class.
27-turn stock motors date back to the very beginning of stock racing when there was 1000 and 1200 mAh batteries. Modern batteries are now pushing the 3500 mAh mark, but until now, we've been stuck with the often under-powered 27T stock motors. This new class is sure to create some renewed excitement. The 19T motors are much more powerful, which will make stock racing much more about driving and much less about motor tweaking, dyno testing and expensive high-voltage battery packs.
The following is the updated rules as posted on the ROAR website: http://www.roarracing.com/
5-48: Motors submitted for approval as rebuildable 19T “Super Stock” motors must have the manufacturer’s name in the form of “XXXX 19” (e.g. EPIC 19, YOK 19, etc.) permanently stamped into the mounting face of the motor can. “XXXX 19” designates the use of the can for 19T “Super Stock” class racing. The manufacturer name on the can will make hybrid motors easy to identify. Any deliberate violation of this rule will be cause to remove all motors of that manufacturer from the approved motor list for a minimum of one year. All motors submitted for approval shall be freely commercially available at a retail price of less than $50.
5-49: All ROAR rebuildable 19T “Super Stock” motors may be either bearing- or bushing-type with an endbell that locks the timing at 24 degrees. The space between the magnets must be centered on one set of mounting holes, which will be marked on one side of the can to indicate zero degrees. The brush hoods will be aligned at 90 degrees from this mark, plus up to 24 degrees of timing. Only single piece (2 magnets in a can) ceramic magnets are allowed. No Rare Earth or Cobalt magnets permitted. The center of each magnet must be 90 degrees from the 0 degree timing mark on the can. Offsetting magnets with the intent of increasing motor performance/timing is not allowed. Any deliberate violation of this rule will be cause to remove all motors of that manufacturer from the approved motor list for a minimum of one year.
5-50: Endbell and can must be designed with a method of locking the timing at 24 degrees. This feature is in addition to any method which secures the endbell to the can (e.g., screws running through the side of the can). The endbell must incorporate a molded tab that keys into a slot on the can — locking the timing at 24 degrees. Endbell timing may only be set at 24 degrees. Extra locking devices (e.g., extra notches in the motor can that allow timing to be changed to 36 degrees or 5 degrees) are not allowed.
5-51: Endbell may have inspection/cooling holes on each side between the negative and positive terminals. These holes would facilitate inspection of commutator tabs. Endbells must be marked with manufacturer’s name.
5-52: The brush configuration can be of any type as long as that configuration appears on a ROAR approved modified or stock motor.
5-53: Motor can must have inspection holes/slots between magnet tips so that the armature may be viewed for inspection of armature tag (see 5-57). These holes/slots may be no closer than .220” from the top or bottom edge of the motor can. View through inspection holes/slots must not be obstructed by anything covering the holes/slots (e.g. motor label).
5-54: Magnets must be permanently glued to the motor can and may not be removed. No magnet shims are allowed (e.g., an extra shim that could be added on the end of the magnet or between the tips to change performance). Flux collector/timing rings are allowed as long as their only purpose is to secure the endbell to the motor can.
5-55: Rebuildable 19T “Super Stock” motor armatures must be machine-wound using a cross wrap technique. The legal 19T “Super Stock” wind is a minimum of 1170mm of round 19 AWG (American Wire Gauge) wire, having a maximum wire diameter (including insulation) of .914mm, resulting in no less than 19 continuous turns of wire on each pole. There is no tolerance on the minimum length of wire, nor is there a plus tolerance allowed on the wire diameter.
5-56: Tabs on the armature’s commutator may only be “compression welded”. No after-market welding or silver brazing will be permitted. All Commutators must be locked to the armature laminations to prevent timing changes.
5-57: Commutator slots must be aligned with the center of the individual poles. Full stack armatures made only of magnetizable material. No modifications to the stacks will be allowed other than the normal drill balance holes. Any modifications to the original OEM Importer/Manufacturer configurations, including but not limited to, excessive drill holes/milling/turning to lighten and/or enhance the performance from that of the full stack will not be allowed. No linear separations of the stack segments will be allowed.
5-58: No split, skewed or tri-rotor armatures will be allowed. Minimum armature stack length is 21.3 mm. Vertical slots will not be allowed on any armature manufactured by the original OEM Importer after January 1, 2002. Vertical slots on all armatures manufactured prior to January 1, 2002 will not be modified from the original configuration as manufactured by the original OEM Importer. At no time will any material be removed from the armature, whether hidden or visible, except those from normal balance holes.
5-59: The crowns on armature pole segments must be symmetrical with a constant radius. They may not have any steps on them or longitudinal holes through them.
5-60: Armature must be tagged in a way that it is easy to identify both in and out of the motor. The tag must be permanently affixed to the armature and made of materials that will not self destruct from the heat of the motor or standard motor cleaning agents. The tag should be positioned between two poles of the armature and must be a minimum of .500” in length. The tag must be printed with the OEM manufacturer’s name and “19” (e.g., “EPIC 19”, “YOK 19”, etc.).
5-61: Armature shaft must extend .125” beyond the endbell bushing when motor is assembled. The overall length of the armature shaft should be 2.775” with .385” extending beyond the end of the commutator. The commutator end of armature shaft must have a machined “step” that differs from the standard radius or taper currently used by OEM manufacturers in production of other stock or modified motors. The step should continue for a minimum of .060” from the end of the shaft.
5-62: No modifications to the physical construction of the motor can, endbell, or armature will be permitted (e.g. adding or removing material from the armature stack, changing the brush hoods from the original manufacturer’s configuration, relocating spring posts). If a motor shows signs of tampering during post race inspection, the driver will receive no score for that qual or main.
5-63: Epoxy balancing of armatures for rebuildable 19T “Super Stock” motors will not be permitted. No more than 2 holes on any 2 poles of the armature are allowed, i.e. no more than one hole on the third pole.
5-64: The armature, motor can, and endbell of a rebuildable 19T “Super Stock” motor must all be from the same motor manufacturer and can contain only components from the same model. No hybrid motors or mixing of parts from different models will be permitted.
02-23-2004, 08:48 PM
#3
Good news, overall a pretty basic set of rules, 24Degree fixed timing, locked comms, mabuchi wrap 19t full stack arm, with normal magnets.
Sounds just like a evolution of the "old skool" stock motor rules.
Current stock motors are way over engineered, 19t at EC has been a great class, a bit more speed but not stupid fast as in mod, do not need fancy motors or batteries.
I have been using a $50 Atlas machine wound 19t Locked timing, with my old packs and going quite well.
Sounds just like a evolution of the "old skool" stock motor rules.
Current stock motors are way over engineered, 19t at EC has been a great class, a bit more speed but not stupid fast as in mod, do not need fancy motors or batteries.
I have been using a $50 Atlas machine wound 19t Locked timing, with my old packs and going quite well.
02-23-2004, 08:56 PM
#4
Tech Champion
Thread Starter
Originally posted by Besercoe
Good news, overall a pretty basic set of rules, 24Degree fixed timing, locked comms, mabuchi wrap 19t full stack arm, with normal magnets.
Sounds just like a evolution of the "old skool" stock motor rules.
Current stock motors are way over engineered, 19t at EC has been a great class, a bit more speed but not stupid fast as in mod, do not need fancy motors or batteries.
I have been using a $50 Atlas machine wound 19t Locked timing, with my old packs and going quite well.
Good news, overall a pretty basic set of rules, 24Degree fixed timing, locked comms, mabuchi wrap 19t full stack arm, with normal magnets.
Sounds just like a evolution of the "old skool" stock motor rules.
Current stock motors are way over engineered, 19t at EC has been a great class, a bit more speed but not stupid fast as in mod, do not need fancy motors or batteries.
I have been using a $50 Atlas machine wound 19t Locked timing, with my old packs and going quite well.
02-23-2004, 09:44 PM
#5
will this 19t class be included in national events such as summer/winter nats etc.?
02-23-2004, 09:47 PM
#6
It is interesting that the 19T motor is so similar in armature specs to our old Group 20 motors (19 AWG wire, 19 turns similar to our 20) Don't tell me that the Americans (Trinity) copied the idea from Australia. Their advantage is that they could come up with handwound because of massive numbers required compared to our small market that could only organise handwound. Looks like Trinity is not that smart after all. You can give the credit to this style of motor to Erik Soderquist (USA) who designed our Group 20. I suppose you could say the Americans had some input
02-23-2004, 09:54 PM
#7
Tech Champion
Thread Starter
Originally posted by Holden Lion
will this 19t class be included in national events such as summer/winter nats etc.?
will this 19t class be included in national events such as summer/winter nats etc.?
classes like 19t and others will be included in various events if demand is proven. At EC we have been running a 19T class and had atleast 1 heat each meeting.
i.e for the last few years 1/12th has not officially been part of MECA, this year due to demand 1/12th has officially been included.
02-24-2004, 02:25 AM
#8
Originally posted by Holden Lion
will this 19t class be included in national events such as summer/winter nats etc.?
will this 19t class be included in national events such as summer/winter nats etc.?
02-24-2004, 03:40 AM
#9
Tech Champion
Thread Starter
Originally posted by vr01
Summer / Winter nats are not national events
Summer / Winter nats are not national events
Summer / Winter Nationals are large events open to all of Australia.
02-24-2004, 09:55 PM
#11
Tech Initiate
Peak Dynasty
Here in Sunny Downtown Whyalla late last year decided to change our control motor for this years racing- We went to the Peake Dynasty 19turn spec Motor- fixed 24 degree timing laydown brushes dual ball bearing -left the brushes& spring brand open. maxium 6 to 1 final drive. Hell these thing go as quick as the old control motor (16x3 Gm Dr.Speed) and only cost $70 each and retail has told us he will stock armatures ect as there is a club in Adelaide now using them . Its nice to see a cheaper motor which to whole club supports even the fast drivers with huge pockets.
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