Motor Testing and Comparisons
#391
With a price limit they sell you a motor and you can buy the faster rotor afterwards......
I think the ROAR did see that while doing tests in the field. On my club there was also a guy who did rewinding motors. By rounding the edges, using a much thinner isolation and a tight hand winding he ended up with a much shorter wire lowering the resistance. And keep in mind the purity of the copper also plays a role.
I think the ROAR did see that while doing tests in the field. On my club there was also a guy who did rewinding motors. By rounding the edges, using a much thinner isolation and a tight hand winding he ended up with a much shorter wire lowering the resistance. And keep in mind the purity of the copper also plays a role.
There are also guys who rewind their motors with 15.5 turns instead of 17.5 turns while using a thicker wire.
#392
Joined: Dec 2001
Posts: 9,866
From: Murfreesboro, TN
EA
#393
The way they get around set prices is by calling “Tuning” a service…..aka “LABOR” therefore they come under or right at said cap and the Gold/Certified/Team edition/or whatever the $180 motor is currently called still has its place. Its been done before and those of use that been in the hobby for a while already know whats coming.
#394
I don't believe motor manufacturers will be updating motors more than once a year. The only company I have see change a motor in less than a year was Hobbywing and Trinity. Fantom changed the Helix after a year, but most will wait at least 2-3 years before dropping a new motor design. It costs a lot of money to change them out too fast, but if people are willing to drop over $150 on a motor, then I guess yearly motor designs will be a thing. However, motors are not like RC cars. There is only so much you can do to a motor to make it better. You can drop internal resistance to ridiculous levels, but then your talking about using rare metals and a $500 motor.
With motors reaching $200, I wouldn't doubt ROAR coming out with a maximum motor price, just like the brushed motor stock class, way back in the day. However, there are $120 motors that will keep up with a $180 motor.
With motors reaching $200, I wouldn't doubt ROAR coming out with a maximum motor price, just like the brushed motor stock class, way back in the day. However, there are $120 motors that will keep up with a $180 motor.
And ROAR already had a $150 limit that they never enforced when Trinity exceeded it.
#395
"8.4.2.1 All motors used in ROAR competition must be on the list of approved brushless motors posted on the ROAR website. Instructions and requirements for submitting motors for approval can be found on the ROAR website. Motor approvals shall be valid for 4 years from date of approval. Manufacturers can renew an approval for motors still in production for no additional fee or inspection for an additional 4 years."
And again, new motors may be submitted at any time. This means if company A has the lowest IR and resulting "fastest" motor out in the field and company B comes along and gets a lower IR and "faster" motor approved, company A can then immediately submit a newer, lower-IR motor to keep up with or perform better than company B's motor. Company C then comes along and drops a motor that out does both company A and Company B's motors and you can see how the cycle of the next got-to-have fastest spec motor goes.
And again, new motors may be submitted at any time. This means if company A has the lowest IR and resulting "fastest" motor out in the field and company B comes along and gets a lower IR and "faster" motor approved, company A can then immediately submit a newer, lower-IR motor to keep up with or perform better than company B's motor. Company C then comes along and drops a motor that out does both company A and Company B's motors and you can see how the cycle of the next got-to-have fastest spec motor goes.
#396
Tech Master
iTrader: (52)
Joined: Oct 2008
Posts: 1,455
From: Spokane, WA
I realize that, but it’s one spec that tends to be lower on faster motors of the same wind. I believe inductance plays as big or bigger role in performance. Nonetheless, if you have manufacturer’s constantly putting out the new “fast” motor, you’ll have racers buying it. I hope EA is correct here and it doesn’t have the impact I fear it will.
#397
#398
I realize that, but it’s one spec that tends to be lower on faster motors of the same wind. I believe inductance plays as big or bigger role in performance. Nonetheless, if you have manufacturer’s constantly putting out the new “fast” motor, you’ll have racers buying it. I hope EA is correct here and it doesn’t have the impact I fear it will.
Inductance, IR, rotor strength, rotor diameter, rotor length, stator diameter, and stator length all have pretty much an equal importance to the performance of a motor. If the balance isn't right, you will get a motor that will overheat within the first two laps. I've jacked around with different rotors and cans and received all types of different data. When I crated an extremely fast a torquey and fast motor, it turned out to run extremely hot.
#399
The biggest problem with removing the IR regulation is not being able to tell if someone has tampered with the windings of a motor. You will have racers come out with a custom wound 15.5 in a 17.5 race and/or a 11.5 in a 13.5 race.
#400
Joined: Dec 2001
Posts: 9,866
From: Murfreesboro, TN
So it should be even easier for people to tech now than before.
EA
#401
Tech Master
iTrader: (52)
Joined: Oct 2008
Posts: 1,455
From: Spokane, WA
Not sure how it would make tech easier. Instead of having a universal minimum IR for a given wind of motor, the tech official must now look up the minimum IR for each motor they tech. Instead of needing to know four different minimum IRs (one each for 25.5, 21.5, 17.5 and 13.5 motors) you'll need access to the minimum IR for 139 different motors (the current number of approved 25.5, 21.5, 17.5 and 13.5 turn motors) and this list will grow as manufacturers submit new motors as we get closer to the September 2026 switchover. In addition to that, in many cases there are multiple versions of the same brand and wind motor. For example ORCA has three different approved versions of the Blitreme3 25.5 motor with three different minimum IR's.
#402
. They can get a motor approved anytime they want BUT do you realize the cost to design a motor, retool for the stator, can, endbell, etc, buy the min from the factory so they will make it and then the cost involved getting it approved by not only roar but efra and ifmar (every two years)? To do that cost several several thousand dollars. They need to sell motors an average of 1.5 years to even break even on the initial cost! So I dont see this being an issue anymore than it already was.
EA
#403
Not sure how it would make tech easier. Instead of having a universal minimum IR for a given wind of motor, the tech official must now look up the minimum IR for each motor they tech. Instead of needing to know four different minimum IRs (one each for 25.5, 21.5, 17.5 and 13.5 motors) you'll need access to the minimum IR for 139 different motors (the current number of approved 25.5, 21.5, 17.5 and 13.5 turn motors) and this list will grow as manufacturers submit new motors as we get closer to the September 2026 switchover. In addition to that, in many cases there are multiple versions of the same brand and wind motor. For example ORCA has three different approved versions of the Blitreme3 25.5 motor with three different minimum IR's.
For club racing, it won't matter. Trophy races? Maybe. Roar regional races and the worlds races, then it would matter, and it's on the Roar officials.
Otherwise, your just whinging just to whinge.
#404
Tech Master
iTrader: (52)
Joined: Oct 2008
Posts: 1,455
From: Spokane, WA
When was the last time you had a motor teched? and what was the circumstances behind it?
For club racing, it won't matter. Trophy races? Maybe. Roar regional races and the worlds races, then it would matter, and it's on the Roar officials.
Otherwise, your just whinging just to whinge.
For club racing, it won't matter. Trophy races? Maybe. Roar regional races and the worlds races, then it would matter, and it's on the Roar officials.
Otherwise, your just whinging just to whinge.
#405



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