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  1. ohio

    Racing and efficiency

    You can watch the whole thing here, and for the juicy bits jump to the light blue Lites Quarterfinals for the electric action: http://www.redbull.tv/live/AP-1M77PBGTS2111/red-bull-straight-rhythm
  2. ohio

    Racing and efficiency

    Thanks guys. What a crazy night. I lost my mind when Hill passed Cunningham.
  3. ohio

    Racing and efficiency

    You can definitely build a fun and competent bike, but you'll have a hard time building something truly competitive. We started by trying to use off the shelf chassis and components, and there was just no way to get to the power, range, and weight that was needed to go head to head with a 250F...
  4. ohio

    BRD RedShift electric motorcycles

    On the former, sort of. We have developed an approach and tech that allows us to pull heat out of the cells about 8-10X faster than Tesla's liquid cooling/system. That is one of the major pieces that allows us to have a drastically simplified 18650 pack. I can't say anything more than that...
  5. ohio

    BRD RedShift electric motorcycles

    Thanks for the kind words. The pack in our first prototype was made with pouch cells and was pretty good... but we saw an opportunity to get much further with 18650. In short, the energy density, costs, and thermal propagation resistance offered by 18650 made it worthwhile to embark on a 4 year...
  6. ohio

    BRD RedShift electric motorcycles

    It's an 18650 cell, but unfortunately I can't disclose specifically which one. Our tech is in the pack, where we have been able to take a sizable amount of the overhead and complexity out of the pack vs Tesla's approach to implementing 18650s. The TSL figures above (185-190Wh/kg depending on how...
  7. ohio

    BRD RedShift electric motorcycles

    Not sure if that was a question or a statement, but if the former, lay it out for me and I'll try to answer.
  8. ohio

    Racing and efficiency

    Like I wrote above, no problem. Hopefully I didn't sound offended... written form is always imperfect. Looking forward to the gear reduction and unsprung weight debates. I've been perusing and getting a feel for some of the different philosophies floating around here. Are (or most?) are valid...
  9. ohio

    Racing and efficiency

    Ha no problem. Don't worry, after 6 years of this, my skin is pretty thick and I generally assume the best intentions anyway. Yeah, a sand track is the worst case scenario and I would expect to see numbers like you describe. Our worst case data was from a top 10 American Pro on a built 450 at a...
  10. ohio

    Racing and efficiency

    I think I am being fair... What numbers are you assuming? A top 5 pro on a 450 puts down 13kW average at a power hog track like Glen Helen. At 35 minutes that's 7kWh of energy (at full power). Most outside that elite, especially on a 250 Are putting down quite a bit less power. So we wouldn't...
  11. ohio

    BRD RedShift electric motorcycles

    It was the easiest way to put 190Wh/kg TSL into terms that a non-technical audience could understand. :D
  12. ohio

    Racing and efficiency

    Hi all, Marc from Alta Motors here. Bumping this thread to answer some questions and hopefully not stick my foot in the paint bucket too hard. Happy to answer follow up questions. Let me know what you got... right up until it's over my head and I need to tap one of our real engineers (my...
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