Search results

Date Relevance Most replies

  1. gcholman

    Battery Advice Needed For Middle School Competition

    eTrike: Thanks for the reply, I love that picture too! That happens to be the same pilot a year earlier. SMUD (the utility putting on the event) took that photograph from the water. What a great contradiction: solar powered boat and a decommissioned nuclear power plant! I love the cover idea...
  2. gcholman

    Battery Advice Needed For Middle School Competition

    Good points - the competition gives every team the same panels. (I kind of like that since we all have the same disadvantage.) It forces us to make improvements in other areas. We have talked about heat sink, but never made it that far. Great idea about epoxy - that way we can mount several and...
  3. gcholman

    Battery Advice Needed For Middle School Competition

    Redilast: it is crazy the watts we are pulling - they peak as you would predict on acceleration and back off once at speed. We have a large box of burned up motors over the last 6 years.... We did not know exactly what we were using until we installed a CA from Grin last year. We are exploring...
  4. gcholman

    Battery Advice Needed For Middle School Competition

    One last thing. After the race, battery-pack was barely even warm. We wired a CA inline and our draw ranged between 350-600 watts. There is a brief break in the middle where we change pilots.
  5. gcholman

    Battery Advice Needed For Middle School Competition

    Thank you both for the fast replies! We are in Paradise, near Chico. Our race batteries were a pair of these: http://www.store.revolectrix.com/Products/Blend435-BLACK-Label-30C-LiPo-Batteries/Revolectrix-3700mAh-6S-Lipo-Blend435-Black-Label-30C-HV We were very happy with how they performed...
  6. gcholman

    Battery Advice Needed For Middle School Competition

    Hello again! We are gearing up for another shot at the California Solar Regatta. Our past batteries have served us well, but we are always not able to quite get the full 180 watt-hours of capacity from the lipo. I was hoping to move towards a safer chemistry and get a battery to our exact...
  7. gcholman

    First ebike, very excited!

    I think you need a support group... :D
  8. gcholman

    Battery Advice Needed For Middle School Competition

    Thanks so much to everyone for their thoughts! Let me clarify a few things: -Yes, we are interested in winning and I really like the weight of the Hobby King packs. In the interest of safety and the fact that we take them out and practice a bit, we would be willing to trade a little weight for...
  9. gcholman

    Battery Advice Needed For Middle School Competition

  10. gcholman

    Battery Advice Needed For Middle School Competition

    Hello all, Hope this is posted in the correct spot. I am a teacher and my class is participating in our 4th solar boat regatta here in Northern California. The contest has really evolved over the years, and this year they have really made some changes. One of the three races is run under...
  11. gcholman

    ONDA Cycle

    Did not get funded, about 7k shy...
  12. gcholman

    Picycle review and experience

    Here is a strange posting on SF Craigslist: This ad is offering 5 extremely rare PiCycle electric bicycle hand-made frames used in the as yet unreleased sci-fi film "Ender's Game" starring Harrison Ford. There are 5 in total ~ batteries are NOT included and the assembled bike image is for...
  13. gcholman

    Picycle review and experience

    Sorry, having trouble embedding link. This was the preview for the Discovery show "Tech Toys 360." The show was delayed due to a hurricane Sandy fundraiser. http://www.youtube.com/watch?v=Cn7yW5ITEnw&feature=youtube_gdata_player
  14. gcholman

    Picycle review and experience

    This week they added the black bike to their "deliveries" and a Mr. Rice to the team page. Maybe they still have a pulse... I agree with PDF. While never riding the bike, like the aesthetics and the notion of a local/green transportation company. Still holding out hope for a nice slice of Pi!
  15. gcholman

    My Dream Bike

    Hello, Long time lurker... I have gone back to this thread several times. I like the quality, US-made bikes you started with. Any updates? How are they holding up? What would you change? I am 6'3", 220lbs, looking for a reliable setup to take me to work. (13.8 miles, 1300ft elevation gain over...
  16. gcholman

    Back in the Saddle: Going to California: 2011

    Best of luck on your journey. FYI,plumas-eureka state park is beautiful, yet closed as a superfund site this summer. Also on the park closure list for 2012.
Back
Top