Ultimate hybrid electric bicycle

Bike using two, four, or six, 36 volt Dewalt battery packs in series for 72 volts powering a 408 Crystalyte motor. More at http://gristmill.grist.org/story/2007/6/1/1287/76804

Category:

Autos & Vehicles

Tags:

• electric
• bike
• bicycle
• crystalyte
• hybrid

[seahorsecowboys]

whats the mph and distance on 2 batts, 4 batts, and 6 batts ? thank you and nice job

[biodiversivist]

@seahorsecowboys

I would recommend four or six. With four you can get about 20 miles on a 45 minute charge, more or less depending on speed and pedaling.

[Drdump1]

Why not try (Less revolution)Front Drive motor with Bigger Wheel 26" n the "2nd Rear Charging motor with bigger Watt n Current but smaller whel 24" (turning faster) to charge back electricity into the Battery, both Motor positive wire with single powerful DC Blocking Diode in series, so U won't need to go home and Charge it regulary. The Travell DISTANCE might get more.....

[biodiversivist]

@Drdump1

I think you are describing a perpetual motion machine ...

[upcycle]

how many amp hours per pack?

what is max current draw capacity?

what is cut off voltage, if any?

How long to charge at max allowable discharge state?

And how many watt hours required to fully charge the max discharged pack?

What is best price/deal on these packs, and where?

[biodiversivist]

I would probably get sued when somebody gets hurt riding one. Thank our litigious society for that one.

[rstevewarmorycom]

@yellowmetalcyborg The pedal acts as a sensor and applies full regen and

to that adds as much regular brake as is needed according

to whether you push the pedal harder to stop more urgently.

All the regen is controlled by is the brake pedal switch, the

pedal still directly drives pad brakes. It's like power brakes

except the additional power brake stores it.

[rstevewarmorycom]

@yellowmetalcyborg Regen braking is not done as the

only method of braking, it is used more like engine braking

before regular pad brakes are applied at the very last.

[yellowmetalcyborg]

@rstevewarmorycom I never said this was a new idea, I was just asking the poster of the video if he had experimented with this kind of set up.

I don't like the idea of regenerative braking; a brake is supposed to stop you bicycle, not recover energy. Regenerative brakes add a substantial amount of weight to the bicycle, decreasing efficiency overall. Plus, what happens when your "brakes" fail? You can put yourself in a very dangerous situation. Regular brake pads are the way to go.

[rstevewarmorycom]

@yellowmetalcyborg Sure, that can work. I saw a

bicycle that used supercaps to do exactly that, and

another used a flywheel for regen braking that was

then used to re-accelerate after a stop.

[yellowmetalcyborg]

@rstevewarmorycom A hybrid design involving both batteries and supercaps can allow for both strong accelerations and good range. When cruising at a constant speed, not much energy is required, providing time for the supercaps to charge up. This design would be a little more complex, but I'm sure it's worth it.

[rstevewarmorycom]

@Drdump1 Uh, that doesn't work. Try Physics 101.

[rstevewarmorycom]

@yellowmetalcyborg And they last for the first 30 feet.

[rstevewarmorycom]

@SeigiSama That would slow you down more than

extending your charge state, it would be like using a

weaker motor that has more heat loss.

[MrKeenius]

I like your design: It does what it should do; it's out of the way, so you concentrate on riding, and you sound pretty happy with it. Cheers!

[flyfkly]

@Drdump1 Exactly! We are always looking to improve and create a more self-sufficient form of transit.