Originally Posted by
8ight-e
Thats crazy.. lol you do understand a sensorless motor won't cog in the slightest or have hesitation in the air right.. sensors only prevent cogging at take off, in fact most people run their rx8's in dual mod (sensorless above the slowest RPMS) being sensorless doesn't make the motor hesitate and you don't cog when there isn't any resistance (in the air).. LOL. I beat sensored setups every time I race, even some pro's on a good day. A sensorless vs sensored setup in 1/8 means nothing.. I've used both from a dead stop (on the ground) it is a touch smoother taking off in a direct drive setup ONLY, but if you run a tekno e-clutch or traktion drive you can't feel the difference at all in fact guys w/ sensored system drop their jaw when they go from their tekin and use my mmm tekno setup...
PS even with a clutch on my buggy me and every other nitro guy in the world who races 1/8 buggies manages to be aggressive and control the pitch of our buggies off jumps.
PSPS sorry as neither his comments or mine have anything to do w/ 1/10 2wd vehicles while jumping and I will agree sensored motors are a must for racing 2wd 1/10 iMO as they would get way too squirrley off the line or when getting on the throttle off a tight turn where you had to slow right up. Over jumps or higher RPM's you can't tell the difference even w/ 2wd 1/10s
lol. I was about to say exactly what your psps you just added said.
However, I still disagree on the "have hesitation in the air". Typical cogging happens when there is a load such that and the start-up algorithm just can't spin the motor up enough to read the back emf and has to re-try, right? The latest and greatest sensorless algorithms now only cog if you are trying to start up from 0 rpm on the face of a jump which is great. I'm not worried about cogging as much as I am the ever so slight hesitation from 0 rpm.
I should have specifically mentioned locking up the tires completely to bring the nose down (which is usually what happens with a 2wd). The start-up algorithm takes a split second to execute, but it isn't a consistent split second. That small variance in can be the difference between bringing the nose up for a smooth landing or lawn darting when flying through the air with the nose of the car well below the rear end to produce more down-force mid flight.