Literally just typing that...... more often than not, that type of issue is a motor sensor.

in general since the viper escs are pure sensored setups, do systems that do a hybrid of sensored starts and sensorless operation afterwards mask issues with motor sensors?

No because the sensor is used during low rpm for smooth starts. It's the nature of a brushless motor to require a sensor to have any kind of control at low rpm because otherwise the speedo has to "guess" where the rotor is and the motor usually cogs. that's also why sensor less systems come on like a light switch.

C'mon.. you and I both know better, and I have to set that record straight because you're applying blame rather than letting the company accept a mistake from the management. Truth be told - the guys behind insisting on a 2 pole 1/8 motor ARE still at the company, they wanted 2 pole because they wanted to do "their own design" and "do it their own way" instead of follow the industry standard and replicate/improve designs and ideas that are already proven functional. None of our pro level drivers ever tested the VSE line and raved about how great the it was, if they raved about anything it would be how smooth it was.. until they wanted more rip - but in the words of Willy, the mastermind behind Viper and Xpert.. it was "fast enough." So yeah, maybe you guys have changed over the years now, maybe Willy has learned a bit more about how to receive testing feedback and actually implement a change in the hardware/design stage of the game, rather than letting known sub-par design flaws trickle through from development to production despite constant contradicting feedback.

We got that VSE motor to a competitive level - with a proper setup and behind the right driver, it could race with the best of them (in a buggy at least, E-truggy's were barely existent at the time). In typical Viper fashion - "barely fast enough but smooth as hell" was the acceptable performance level to move from development to production. We sold a few of them, but mostly people burnt them up because people would buy too low of KV options and then they overgeared them because they weren't fast enough. Or they'd get the high KV range but wouldn't gear them down enough, or they'd run the PWM rates all wrong.. Simply put the 2 pole was too sensitive to overheating from setup issues.

Anyway, if you ran the 2450kv and geared it properly on an RX8, it was pretty damn fast. The problem is there shouldn't have been a 2pole 1/8 motor "with our own design" in the first place. Thankfully for all of you customer's sake, they pulled the motor out of production.

Sorry, Nick, don't want to stir stuff up, but maybe next time you address a failed product.. you should just say the company made a poor decision, rather than blame those people whom were on the receiving end of such poor management. Because those guys you're referring to whom are "(no longer with the company)" had a lot to do with getting this brand established, and I'm here to tell you the brand doesn't deserve a lot of what they put into it, and they're lucky to still have you sticking with it.

And maybe I should remove this thread from sending me occasional email notifications, after all ignorance is always bliss..

Maybe you should also tell them the real reason why Viper's website was down for so long and why the old one couldn't be updated even when it was up? At least you're not pointing fingers at the last web developer they used and never paid and whom left with all the coding information. Whoops

So i tested the motor on a different esc and it is good, tested a good motor on the esc and got the same behavior as before. Had one guy suspect a bad mosfet in the esc...does that sound plausible? Or bad sensor port? How much would it cost to send in for inspection and repair?

There really isn't a way to repair them as they are blocked in epoxy. If it is outside the warranty period you can take advantage of the trade in program which is pretty stellar.

minidub, please leave off. Your post isn't beneficial to anyone.

Sounds like a mosfet. Had a novak ESC do the same thing before, pulled off the heatsink and one of the 3 was burnt.

My vtx10BE just lost power with maybe 3 minutes of run time...just went out and no power anymore. I tried other packs and reciver and nothing. Motor, lipo and esc wasn't even warm. been running this esc for about 8 runs keeping check on the temps + i was in blinky mode. I am the second owner of this esc, the guy said he had it for a couple of months + a had it for about 2 months. Should i just do a trade in or see if the warranty is still good. How much are the trades for this ESC. I paid $80 for it and now its not doing nothing.

What is your motor temp protection set at? Are there any lights flashing on the V-Port?

Just trying to make sure I understand the trade in program. I would fill out the form and send in my ESC, and pay an additional $120 plus shipping to get a replacement that would have a warranty on it?

Just trying to make sure I understand before I decide how to proceed.

Thanks!

No lights because there is no power

wileycat - check your PM

There are 3 parts - motor sensor, sensor wire, sensor port (fet driven) part on speed control. So it can be any of them.

www.hadrma.com is the site to start the warranty/trade in process, all the info is there or PM me if you have more questions.

please viper when is the release of the new VTX8 or the new esc for 1/8's? i really need one and i don't want to go to Tekin orion hw, is it mid year? any hints?

do all the new viper black edition motors come with 12.3mm rotors? even the mod motors? I assume the 10.5 has the 12.3mm stock rotor.