meepmeepmayer Posted June 24, 2020 Share Posted June 24, 2020 3 hours ago, Ben Kim said: The Sherman has a hard amp limit to protect the board from failure 1 hour ago, Chriull said: Would not be the worst idea Isn't that really stupid? Like the old-timey BMSes that simply switched off if the power draw was too high before manufacturers figured out that's a bad thing for EUCs? It's not like the mosfets insta-explode as soon as that number is reached. Quote Link to comment Share on other sites More sharing options...
Ben Kim Posted June 24, 2020 Share Posted June 24, 2020 1 hour ago, meepmeepmayer said: Isn't that really stupid? Like the old-timey BMSes that simply switched off if the power draw was too high before manufacturers figured out that's a bad thing for EUCs? It's not like the mosfets insta-explode as soon as that number is reached. Given how often gotway boards explode (100v) for the aggressive riders, i think veteran really did not want the bad PR from board failures so it was conservatively tuned. Quote Link to comment Share on other sites More sharing options...
Chriull Posted June 24, 2020 Share Posted June 24, 2020 (edited) 2 hours ago, meepmeepmayer said: Isn't that really stupid? Like the old-timey BMSes that simply switched off if the power draw was too high before manufacturers figured out that's a bad thing for EUCs? I hope they don't switch off but "just" limit the current - a big difference. (As the z10 does) So one overleans in some situations a bit earlier but the wheel/wires have a chance to survive. Maybe also some more bones as tge accident happens with a bit less speed. Quote It's not like the mosfets insta-explode as soon as that number is reached. That would imho be a bit higher. And motor coil inductance should/could dampen such current surges so that mosfets desolder, their legs and motor wires melt before. A10p config can deliver huge currents - the motor could survive this temporarly, but the wires and electronics inbetween dies. There is no sense to let this happen and risk li ion fire at the worst. I don't understand why gw with their 6p config does not implement any overcurrent protection. Maybe they start now after their fires... But anyhow - as my very personal guesses are from this video it would most probably not have prevented the incident. Just with some km/h more and some fried mosgets/wires... Edited June 24, 2020 by Chriull Quote Link to comment Share on other sites More sharing options...
Popular Post Marty Backe Posted June 24, 2020 Popular Post Share Posted June 24, 2020 (edited) From what @Linnea Veteran said on Facebook, the pedals basically get "soft" under extreme loads. So no, I hope it doesn't just shut off. I think this manifests itself in the sense of low-torque. Climbing a steep hill slowly? The pedals will probably fade and you'll fall off the front end as the pedals dip forward. This matches a few descriptions I've seen. I'd rather see this than pedals that remain super firm up to the point that the MOSFET's vaporize. I'll have the Veteran next week so I'll be testing this behavior (I won't be testing the high-speed behavior). Edited June 24, 2020 by Marty Backe 9 Quote Link to comment Share on other sites More sharing options...
Popular Post DjPanJan Posted June 24, 2020 Popular Post Share Posted June 24, 2020 1 minute ago, Marty Backe said: I'll have the Veteran next week so I'll be testing this behavior (I won't be testing the high-speed behavior). Overheat hill please 👍 ✔🎢🌄 5 Quote Link to comment Share on other sites More sharing options...
Ben Kim Posted June 24, 2020 Share Posted June 24, 2020 3 hours ago, meepmeepmayer said: Isn't that really stupid? Like the old-timey BMSes that simply switched off if the power draw was too high before manufacturers figured out that's a bad thing for EUCs? It's not like the mosfets insta-explode as soon as that number is reached. its not BMS related though, its the board that applies that arbitrary limit. A cutout isn't from the batteries, its from the board when it doesn't get the power it requests. I mean, unless you're really beating the snot out of that wheel or weigh the same as a Sumo, it shouldn't be much cause for concern. Given the lack of context, the guys in NYC were TRYING to make that wheel cut out, which isn't indicative of how the wheel would act in a normal riding scenario (where people have their own money invested into the wheels). 1 Quote Link to comment Share on other sites More sharing options...
DjPanJan Posted June 25, 2020 Share Posted June 25, 2020 @Ben Kim I disagree it doesn't matter what the NYC riders did and that they tried to cut out / overlean. The firmware is faulty if it cannot handle it. These are just excuses that the rider is heavy etc. Is it hard to admit that the firmware is not tightened yet? It's not a shame for a Veteran company, it's a wake up call. Sherman needs to get a firmware modification, and that's the point of pre-production machines. Catch mistakes before mass production. It is logical that they "loosened the taps" on the test machine to make the WOW effect as large as possible. They did not anticipate that a NYC "saboteur" would appear who had a physical constitution and a head to send Veteran to the ground at all costs. Let us, as a community, be glad that this mistake was discovered as soon as possible and it will be resolved sooner. 1 Quote Link to comment Share on other sites More sharing options...
Boogieman Posted June 25, 2020 Share Posted June 25, 2020 (edited) On 6/24/2020 at 5:01 AM, Marty Backe said: Thankfully my new Tesla V2 still has a real soft mode and a hard mode that's harder than the MSX/MSP And so does my beautifully aged Tesla v1.2 😍 Though, I am the kind of guy that only ride the hard mode. I can't stand the sluggish response on soft and medium is still not reactive enough. So to me, go ahead and make Hard Granite hard Diamond hard Modes 😁 Edited June 25, 2020 by Boogieman 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Antec Posted June 25, 2020 Popular Post Share Posted June 25, 2020 (edited) 13 hours ago, DjPanJan said: Overheat hill please 👍 ✔🎢🌄 Thats if @Marty Backe can Lift it over that first metal gate Edited June 25, 2020 by Antec 9 Quote Link to comment Share on other sites More sharing options...
Marty Backe Posted June 25, 2020 Share Posted June 25, 2020 1 hour ago, Antec said: Thats if @Marty Backe can Lift it over that first metal gate Unfortunately it does appear that you need both arms to lift this wheel since there's no center handle. This could be inconvenient. We'll see ... 2 Quote Link to comment Share on other sites More sharing options...
FreeRide Posted June 25, 2020 Share Posted June 25, 2020 8 hours ago, Marty Backe said: Unfortunately it does appear that you need both arms to lift this wheel since there's no center handle. This could be inconvenient. We'll see ... Slide it under, no problem 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Jon Stern Posted June 25, 2020 Popular Post Share Posted June 25, 2020 8 hours ago, Marty Backe said: Unfortunately it does appear that you need both arms to lift this wheel since there's no center handle. This could be inconvenient. We'll see ... Make a ramp and do an impressive jump. 5 Quote Link to comment Share on other sites More sharing options...
Popular Post Ben Kim Posted June 25, 2020 Popular Post Share Posted June 25, 2020 13 hours ago, DjPanJan said: @Ben Kim I disagree it doesn't matter what the NYC riders did and that they tried to cut out / overlean. The firmware is faulty if it cannot handle it. These are just excuses that the rider is heavy etc. Is it hard to admit that the firmware is not tightened yet? It's not a shame for a Veteran company, it's a wake up call. Sherman needs to get a firmware modification, and that's the point of pre-production machines. Catch mistakes before mass production. It is logical that they "loosened the taps" on the test machine to make the WOW effect as large as possible. They did not anticipate that a NYC "saboteur" would appear who had a physical constitution and a head to send Veteran to the ground at all costs. Let us, as a community, be glad that this mistake was discovered as soon as possible and it will be resolved sooner. I could make my Mten3 cutout on command at 5 mph. I can cut out a Kingsong if i want to try hard enough, does that make those wheels defective? No, it means you should learn your wheels limits. there is an inherent trade-off between ride feel and gyro, and I am extremely happy Veteran chose to prioritize ride feel over a worst case fat man scenario which isn’t indicative of normal use. 8 Quote Link to comment Share on other sites More sharing options...
Ben Kim Posted June 25, 2020 Share Posted June 25, 2020 9 hours ago, Marty Backe said: Unfortunately it does appear that you need both arms to lift this wheel since there's no center handle. This could be inconvenient. We'll see ... In practice, i find two-handed lifting far easier than popping the seat off the Monster and trying to one hand that beast up my steps. You can also pull the wheel up stairs by the front guard rail. 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Mango Posted June 26, 2020 Popular Post Share Posted June 26, 2020 I may order a custom shirt with wording like this. That way, I don't have to stop and answer so many questions. 11 Quote Link to comment Share on other sites More sharing options...
MrRobot Posted June 27, 2020 Share Posted June 27, 2020 Spec sheet says 10amp max charging through dual ports but ewheels says 8? 1 Quote Link to comment Share on other sites More sharing options...
Popular Post Rywokast Posted June 27, 2020 Popular Post Share Posted June 27, 2020 On 6/25/2020 at 5:42 PM, Mango said: I may order a custom shirt with wording like this. That way, I don't have to stop and answer so many questions. you forgot to add "too much for you"... above all else, the question "how much" comes up more than anything, then how fast 4 Quote Link to comment Share on other sites More sharing options...
Ben Kim Posted June 27, 2020 Share Posted June 27, 2020 5 hours ago, MrRobot said: Spec sheet says 10amp max charging through dual ports but ewheels says 8? ewheels is offering an 8A charger for sale, it’s not the maximum charge capability of the wheel. 10A is a conservative number though, i wouldn’t be surprised if it can do 15 for small spurts. The limiting factor is the charge port used 1 Quote Link to comment Share on other sites More sharing options...
null Posted June 27, 2020 Share Posted June 27, 2020 I believe the GX16 port can take something like 7A at 250V so I suppose it could take more Amps at lower voltage (?) The GW monster supposedly takes 10A on a single port. Quote Link to comment Share on other sites More sharing options...
Chriull Posted June 27, 2020 Share Posted June 27, 2020 23 minutes ago, null said: I believe the GX16 port can take something like 7A at 250V so I suppose it could take more Amps at lower voltage (?) No. The dissipated power comes solely by the contact and pin resistance and the current. The voltage specified is the defined by the pins distances/surface. 23 minutes ago, null said: The GW monster supposedly takes 10A on a single port. Afaik because they use 2 pins in parallel for each wire. 2 Quote Link to comment Share on other sites More sharing options...
null Posted June 27, 2020 Share Posted June 27, 2020 Thank you for the clarification, good to know. Quote Link to comment Share on other sites More sharing options...
Planemo Posted June 27, 2020 Share Posted June 27, 2020 5 hours ago, Chriull said: Afaik because they use 2 pins in parallel for each wire. Like most factory gotways for some time now. Its handy to know that the gx16 is happy to 10a though when 'double pinned'. Quote Link to comment Share on other sites More sharing options...
onizukagto Posted June 28, 2020 Share Posted June 28, 2020 found this video of someone riding the Veteran in real city traffic. looks amazingly nimble! 2 Quote Link to comment Share on other sites More sharing options...
onizukagto Posted June 29, 2020 Share Posted June 29, 2020 (edited) https://www.facebook.com/groups/ElectricUnicycle/permalink/3048546131909996/ (source: facebook) found more veteran road riding videos! the bloke pushed the veteran to 78.9km/h!!! almost 50mph! 76189563_287644442437786_2941998538320807311_n.mp4 104738240_271761920597602_3875500025172567114_n.mp4 76189563_287644442437786_2941998538320807311_n.mp4 Edited June 29, 2020 by onizukagto apologies for the duplicated video posting, dunno how to delete it. lol 2 Quote Link to comment Share on other sites More sharing options...
Popular Post Jon Stern Posted June 29, 2020 Popular Post Share Posted June 29, 2020 Riding the beeps, looking down filming the display, and no protection! Potential Darwin Award winner there. 7 Quote Link to comment Share on other sites More sharing options...
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