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Jason McNeil

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Jason McNeil last won the day on March 23

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About Jason McNeil

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  1. Another point I forgot to mention last night: when the first tear-down photos were posted by EcoDrift, I wrote a list of questions about the Nikola, where the selection of these MOSFETs was at the top of this list. MOSFETs: What type of MOSFETs are used in the Nikola, are they HY brand, what model? Why are they not the TO-247 type found in the MSX? Is there now max current regulation in the firmware? If so, what is this value, 100A max? What sets Gotway apart from other Manufacturers, is that their firmware (as of a year ago) does not perform current regulation—this is why their controllers do not contain fuses. I lobbied pretty hard for the TO247 on the Nikola, but the answer I got was that the Wheel had been extensively tested, that fears of going back to bad old days of controller blowouts were unwarranted... You give me too much credit here. Gotway Engineers are no fools, when contrasted to an organization like Ninebot with their vast resources, Gotway have usually been open to reason, & back up their products. This may be true, we need to commission a test rig for stressing the controllers under various loads in test these principles experimentally. I could be wrong, but I suspect that with a drop of efficient thermal compound on the conductive metal surface, will make an dramatic effect on shuttling away heat. In most applications these components are probably not stressed to anywhere to the same degree with as on a Wheel charging up a hill on a hot day, where the standard insulating pad is adequate. Also a special thanks to @Marty Backe & @Phil McLaughlin for their efforts with this investigation.
  2. Yep, this his charred remains of your controller
  3. Tina advised yesterday it's just a couple days delay, we'll see...
  4. Apologies for the late attendance to the party. Since receiving a 2nd board failure (this case was different, it was powered on from a stand still & didn't respond), including Marty's, within two weeks of shipping out the first batch of Nikolas, I've reached out to Linnea on Thursday to try to come up with an action plan to see what options are available to greatly reduce/eliminate the risk of these MOSFET thermal overload events. The evidence from both of these failures has marked similarity in outcome (see below), where this glue may be acting as a thermal barrier, not helped by the absence of thermal paste on the underside of the metal heat transfer surface. One option being explored, is to recall the boards. remove this glue, & apply the thermal paste. To date Gotway have shipped 600 units; they say they have not received reports from other regions of this failure—it's likely more will trickle in in time. Putting out an official recall is not something to be taken lightly; in their defense, they're probably looking for a few other reports, before taking this step. Gotway have a lot of experience with building high power motor vehicles; they had gone through several rough patches, particularly with reliability of earlier generation boards, with the weaker MOSFETS, but at least then they were pretty consistent with applying liberal quantities of thermal paste to this underside. It was baffling to me why they would go back to an inferior TO22x FET package AND now we learn about the lack of thermal paste. From my experience, such oversights are usually not the result of penny-pinching, but execution on the production line, where the factory needs a ruthless eagle-eyed floor manager, to see that every step of assembly is done by the book. The silver-lining to all this, is that an early finding in the production cycle is a necessary facet to a small-scale non-ISO production facility, where the manufacturer's financial pain of having to deal with a crisis, means that they will be imbued with a sense that this situation must never occur again. For all current Nikola owners, please hang in there, we should have an action plan in the next few days. EDIT: To anticipate questions on the 100V Nikolas, they are using the TO247 MOSFET package, the first production of these special edition 1845Wh variants is still underway, there is assurance that in light of this episode, they will getting the thermal paste treatment! 
  5. Apologies for the late attendance to the party. Since receiving a 2nd board failure (this case was different, it was powered on from a stand still & didn't respond), including Marty's, within two weeks of shipping out the first batch of Nikolas, I've reached out to Linnea on Thursday to try to come up with an action plan to see what options are available to greatly reduce/eliminate the risk of these MOSFET thermal overload events. The evidence from both of these failures has marked similarity in outcome (see below), where this glue may be acting as a thermal barrier, not helped by the absence of thermal paste on the underside of the metal heat transfer surface. One option being explored, is to recall the boards. remove this glue, & apply the thermal paste. To date Gotway have shipped 600 units; they say they have not received reports from other regions of this failure—it's likely more will trickle in in time. Putting out an official recall is not something to be taken lightly; in their defense, they're probably looking for a few other reports, before taking this step. Gotway have a lot of experience with building high power motor vehicles; they had gone through several rough patches, particularly with reliability of earlier generation boards, with the weaker MOSFETS, but at least then they were pretty consistent with applying liberal quantities of thermal paste to this underside. It was baffling to me why they would go back to an inferior TO22x FET package AND now we learn about the lack of thermal paste. From my experience, such oversights are usually not the result of penny-pinching, but execution on the production line, where the factory needs a ruthless eagle-eyed floor manager, to see that every step of assembly is done by the book. The silver-lining to all this, is that an early finding in the production cycle is a necessary facet to a small-scale non-ISO production facility, where the manufacturer's financial pain of having to deal with a crisis, means that they will be imbued with a sense that this situation must never occur again. For all current Nikola owners, please hang in there, we should have an action plan in the next few days. EDIT: To anticipate questions on the 100V Nikolas, they are using the TO247 MOSFET package. The first production of these special edition 1845Wh variants is still underway, so there is assurance that in light of this episode, they will getting the thermal paste treatment!
  6. Yeah, we're on the Gotway order queue bandwagon already.
  7. Cool! The YT Review for the Lightning went semi-viral, currently at 270K views, it's giving the Dualtrons a run for their money.
  8. Just received some mock-up photos for the upcoming 16X. The proposed faux carbon-fiber finish looks rather nice, similar to the Z10, I think they're still debating on whether to go with this, or the same rubberized matte black as on the 18XL, 16S, etc... One of the unresolved topics is the color of ornamental side pads. I rather like the dark grey pads to give the Wheel some contrast, from the monotony of the all black, but it is still somewhat in the air. What do you guys think? Put in a vote if you have an opinion.
  9. 98% of the time, the Inmotion Covers do come in the box. In this instance, it was our few remaining V5Fs, the cover stock for this model was depleted, ordered some replacement to be flown in.
  10. Gotway did a similar thing with the Tesla v2 too; even while our order was underway on the production benches, they released the v2. The plan with these Monsters is to negotiate obtaining a supply of these shells to offer as either upgrade replacements or a packaged deal. It doesn't appear that the structure of the body has improved, which was/is the main weakness of this model. Charging at 20A, IMO, is really not a good idea. Will GW be offering a $2m insurance policy if the battery goes up in flames? It's good to see that they've finally adopted the reverse diode protection that we've been using on our special Gotway orders for the past 1+ year.
  11. Preferably a Full-time, there's some flexibility with hours. We're approaching 1000 shipments a month (Wheels, scooters, parts), I'm simply out of capacity to deal with everything.
  12. There is a development update to report; they will be using a new 2200W motor, using a different PWM waveform, to try to match the silent & instant responsiveness of the Gotway controller. Tina says this is not expected to delay the production, currently still on target for next month, however, the demo Wheel is delayed until month's end now.
  13. The clearance between the innershell & the tire is pretty tight. Factors that can influence this are 1) tire pressure, 2) rider weight, 3) position of the foot on the pedal, a stance further out will exert greater inward pressure & flex in the shell body.
  14. This is the information we have so far: The Wheel had 7000km, in 9 months, when it was sent in for repair in late November It had sustained multiple crashes (David had written this in an earlier communication), destroyed inner-shell, chew-up motor wires, which also destroyed the controller; it was a unique specimen of a damaged Wheel. We have a good documentary trail for this repair. When it was sent back out, everything was changed except the battery pack. There was no visual indication, or other evidence that anything was wrong with the pack at that time. Assuming that it had done similar mileage over the intervening 5 months, it had then clocked up a further 4000+ km; possible subsequent crash damage? Quite probably. He had been using only the standard 2A charger with the Wheel, he has also confirmed it was not charging at the time it lit up. His therapist is another first-hand eye-witness account who can corroborate what exactly happened at the time. I will be contacting both the therapist & the NY Fire Department to assist in the investigation. At this moment, it's not clear what evidence is recoverable from the site. If one had to speculate into causation, then based on what we know from the V10F affair, if water does permeate into the cells, accelerated corrosion will cause a short between the electrodes, creating a runaway cell thermal chain reaction. Understandably David is in a state of shock & is angry, replacing the Wheel is small beans; what is important to me, is that we have a clearer picture on causation, so a similar event does not happen again. As bad as the situation is, it might have been a whole lot worse!
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