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  1. Sharkboat

    modeling a battery

    In this book, ftp://myebooks.dyndns.org/physics/energy/Electric%20Vehicle%20Technology%20Explained%20(2003).pdf it gives an equation used to model the open circuit voltage of a NiCad battery. I would like to make a graph similar to this one: http://www.thunderpowerrc.com/html/extreme-V2.html...
  2. Sharkboat

    Help needed!

    I just found a great textbook about electric vehicle technology. It's the first edition, the 2nd just came out and is probably even better. It's called Electric Vehicle Technology Explained. ftp://myebooks.dyndns.org/physics/energy/Electric%20Vehicle%20Technology%20Explained%20(2003).pdf The pdf...
  3. Sharkboat

    motor cooling

    I have only just begun to drive my trike and i decided it needs more power. I started looking into additional cooling. It is a astro 3220 with a fan and open case. The Davinci Drive is aluminum and also absorbes and dissipates heat. So far i have only been running low power, 1000W and the motor...
  4. Sharkboat

    Becoming Professional

    I am going to be graduating in May with a Bachelors in Mechanical Engineering. I know that there are a few members on this forum that are professionals in the e-bike/motorcycle industry. Electric vehicles are my passion and I would like to pursue it as a career. What would you suggest for ways...
  5. Sharkboat

    Sustainable Vehicle

    I am a senior mechanical engineer working on my senior project. The goal of this project is to make a sustainable vehicle. The second goal of this project is to create "a perspective shifting machine."-liveforphysics. Parts: Frame: KMX Tornado 2011 Kit: 750 Motor: 3220-F 4 turn $800 Reduction...
  6. Sharkboat

    Astro Flight motor comparison

    Astro Flight motors have been shown to work well on e-bike applications. They have a high resistance to heat and are up to 93% efficient. However, this is only the peak efficiency and is usually achieved at about half of the low end of the typical power range. For the 3220, this is 2000 Watts...
  7. Sharkboat

    Efficiency

    My goal is to create an efficient electric vehicle. Efficiency can be defined in a lot of ways, but the most convenient for me is in Wh/mi. I am looking for some advice on ways to increase the efficiency of an electric drive system. ---Background Info---- Efficiency depends on a lot of...
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