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  1. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    There's a backup power supply in the ECM so even if the 12V battery gets disconnected the capacitor has enough oomph to get the job done.
  2. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    "To what extent do you address combination failures?"In automotive we don't. SPOF only as a general rule. There may be exceptions.
  3. GregLocock

    Tesla Cybertruck fire and alleged design flaw. . .

    "Interesting an electric door release without a mechanical scheme is able to pass a reasonable functionality/hazard mitigation review for use in a passenger vehicle." Yeah, having lived through the rollout of systems engineering and SPC in a car company I can see that FMEAs are not the Tesla...
  4. GregLocock

    BIW hem overlap minimum requriement

    That depends on what you are using to fasten them together, the thickness of the material, the materal. Guessing you are talking 0.8-1.0mm steel, and spotwelds, it will depend on what your machine is set to, and how accurately you can place the electrodes and how accurately the clinch joint is...
  5. GregLocock

    Brake pad custom shape

    And a very good mask.
  6. GregLocock

    Troubleshooting ADXL345 Data Inconsistencies Under High-Frequency Vibrations: BW_RATE Tuning & Interface Selection

    Could you post a spectrum? I'd guess you set AA to at least 1.2*the highest frequency of interest. I think (from reading elsewhere) that this sets the sampling frequency on this chip or vice versa, which is a bit odd, normally I control them separately. Typically we sample at a very high rate...
  7. GregLocock

    BEV adoption rates and factors that enhance or detract

    Purchase price UK On sale now, the 2017 Renault ZOE is priced from £13,995 to £20,645 (with battery leasing and after the Government's plug-in grant). Buy the batteries and the car will cost from £18,995 to £26,245 after the grant The price of a new 2017 Renault Clio in the UK varied depending...
  8. GregLocock

    wheel time hole sizes

    Wheels I am used to use the hub as a centreing/load taking device until the nuts are tightened, when all loads are taken by friction between the back of the wheel and the vertical face of the hub.I don't remember seeing witness marks on the hub itself, or metal dust. Besides the danger of...
  9. GregLocock

    wheel time hole sizes

    say max acceptable oob is 5g, and its a 16" wheel, so 100 g cm. Wheel weighs 15 kg (?) so max radial clearance to hub if hub centric is 100/15000 cm, about 3 thou. Hmm.
  10. GregLocock

    wheel time hole sizes

    "All original equipment manufacturer (OEM) rims are hub-centric, and it’s this contact point (between the hub and the center hole of the rim) that carries the weight of the vehicle. " Wrong on both counts.
  11. GregLocock

    wheel time hole sizes

    I've never seen hub centric wheels in practice. I know they exist.
  12. GregLocock

    wheel time hole sizes

    We used to have wheelnuts with very thick washers somehow crimped onto them. Even so 4.5mm clearance sounds madly excessive even for a hub centric design (which I have never come across in practice)
  13. GregLocock

    BEV adoption rates and factors that enhance or detract

    Given that all the brands mentioned have reasonable crash ratings it would appear that crash ratings aren't fit for purpose. The government/institutions have set the wrong test criterion for engineers to optimise around. So I'll give you a clue or two. That big TV screen in the centre console...
  14. GregLocock

    BEV adoption rates and factors that enhance or detract

    More subsidies from poor people to rich people China's subsidies represent about 10% of EV prices, while South Korea and Germany offer around 16-20%. The US provides roughly 26% through various federal and state programs.
  15. GregLocock

    BEV adoption rates and factors that enhance or detract

    I believe Tesla fines you if you overstay. I doubt it would be hard to include dynamic pricing for chargers, based on the number of vehicles waiting, and your SOC.
  16. GregLocock

    BEV adoption rates and factors that enhance or detract

    Some journo in the UK observed that the shortage of public chargers is exacerbated by the drivers who want to charge to 100% which takes much longer than 90%.
  17. GregLocock

    BEV adoption rates and factors that enhance or detract

    Well yes and no. Many things take half a decade to get into production even after they have been officially blessed. So to some extent they do have to crystal ball a fair amount. But yes the worst (possibly) thing that ever happened to US OEMs is quarterly reports to Wall St.
  18. GregLocock

    BEV adoption rates and factors that enhance or detract

    "why are the OEMs still betting so heavily on EVs?" Sunk cost fallacy and a reluctance to admit their wisdom was limited. The boards drunk the Net Zero Kool Aid, especially VW and Ford, and deemed in the face of raised eyebrows of the mere minions that BEVs were the future. Having decimated or...
  19. GregLocock

    BEV adoption rates and factors that enhance or detract

    BEV in Norway was heavily incentivised by the government. The Norwegian EV incentives: No purchase/import tax on EVs (1990-2022). From 2023 some purchase tax based on the cars’ weight on all new EVs. Exemption from 25% VAT on purchase (2001-2022). From 2023, Norway will implement a 25% VAT on...
  20. GregLocock

    BEV adoption rates and factors that enhance or detract

    " BEVs having lower % depreciaiton" Not according to industry figures. https://www.msn.com/en-gb/cars/news/is-britain-facing-an-ev-car-finance-bombshell-how-electric-car-owners-who-take-out-pcp-loans-risk-paying-far-more-than-vehicle-is-worth-due-to-collapse-of-second-hand-market/ar-AA1lgPRA...

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