Originally posted by utieh
what do you think of that, pretty funny...
Brushless Motor System Myths
These points below are in reaction to ads that have been run which we feel could be misleading to the customer about Brushless Motor Systems. In our opinion, this is a technology that is not all it is advertised to be.
Only Need One Motor: False, you will still need several motors for each application you decide to use them in.
Motors are Indestructible: False, Brushless motors can still be susceptible to shorts due to faulty winding, debris entering the motor and heat.
Torque and RPM are the same as brushed: False, you will need to give up one for the other. That is another reason why you need more then one brushless motor.
No Maintenance: False, cleaning, bearing replacement and magnet zapping will still be needed for top performance. Also, any damage to the motor can may cause the motor to fail.
Brushless will take the battery war out of play: False, Batteries will play a bigger part since brushless systems depend on high voltage, amps and super low internal resistance to operate as a race motor. Bottom line... you will still need to have quality batteries.
Some say the Speed Control can be programmed to a spec level and everyone will be the same: False, again at this point batteries will make a huge difference. Good quality packs will be essential. In the end, a " Team Driver" will still have the advantage due to speed controller programming knowledge, access to unreleased technology and the ability to jump the regulator that restricts the amp flow. It is much easier to just tech a motor.
Brushless Performance: There will still be better motors than others due to manufacturing tolerances. Remember the price on a brushless motor when you have to replace it because it does not perform as claimed. Since there is no easy way to maintain and keep a brushless motor up to original spec (i.e. rebuild) it may be necessary to purchase new motors often at a very high price to keep up with your neighbor or racing rival.
Here's a novel approach. Why don't we answer to all the points in the Trinity atatement.
1.Ok..so we need more than 1 motor for the various performance classes. BIG DEAL. So do brushed motor users. Also, this is based on the assumption that the multi level ESC will not continue to be developed. The true lure of BL is in both performance and long term value. No brushes, no springs,no comm lathes, etc.
2. I don't think anybody said the BL was indestructible. I read the Novak ad again and I don't see anything that says indestructible. Shorting, debris and heat have taken the life of a few brushed motors I've had. That potential exists in EVERY electric motor.
3.Torque and RPM. Until you've seen graphs of engine performance, that statement doesn't hold water. Theres a big difference when we talk about USABLE torque/rpm vs. raw torque/rpm.
4.Maintenance. Novak specifically points to brushes, springs and comms in their ads. Ok, so we have to clean it.BIG DEAL. Bearings replaced ?? until I see where there's a rash of replacements going on, I can't place much faith in that statement. Zapping?? maybe for the absolute, best performance. You know...the kind maybe 1% of the total rc driver community needs. That reminds me...I guess I should have purchased a Zapper since apparently everybody but me must have one. Damage to can. DUH !!! If you're the type that drops his motor on the ground alot then you have a much bigger problem !!
5.Batteries. Good batts are good batts whether it's for BL or brushed. Until you prove where BL's needs are that different than brushed...the point is mute. Keep in mind that Batt technology is on the verge of a major change also. And guess what...GP won't be the big dog on the market anymore. Uh,Oh...what will Trinity do ???
6. "Team Drivers" will always be team drivers. SO WHAT !! If I had to compete against a team driver, I'd most likely be one too !!! and therefore I'd have the same "percs" available to me too.Yes, if we want to create a more level playing field in a given class, tech will have to rise to the occasion.
7. Manufacturing differences and performance. OK, thats very likely but doesn't the same "problem" exist in brushed motors?? And just HOW MUCH difference are we talking about?? I don't think anybody knows yet. A common sense approach would dictate that a more efficient, less complicated motor design would tend to be closer in performance from one unit to the next. Again, all I ask is ...prove it !!!