Re: Ultracapacitor Electric Bicycle

Hey man, are You under PROZAC ?

Doug Goncz wrote:

Initial tests with the Ametek servo motor, 1950s technology, are done. Various
gears can be fitted for a second stage collecting data to get motor/generator
slopes.

The new motor is here. 1990s technology, a Servo Disc with integrated tach.
Predicted performance is 25 W/mph electrical at 20 mph equilibrium. A motor
mount was purchased, a six inch PVC pipe cap. A motor mount disc is easily made
from Melamine board in stock.

Some machining is needed from Jensen for motor pinions.

It is just concievable that the Ametek could go between the Servo Disc and the
bottom bracket. It's a real squeeze. If that is done, the 18 W fluorescents
will power up the moment you pedal to 60 rpm in first gear. That's 100 W
incandescent equivalent.

The caps are wearing well and hold their charge a long time. I did a roll out
on a long level patch and it was amazing. The thing just wouldn't stop going. I
never did find out how far it could roll.

Currently, the motor is geared too high and generates too much voltage,
limiting the equilibrium speed to a very low value. There's nowhere to go but
down on gearing, though, and the range is large.

Continuous drivetrain tinkering is required. Not the motor drive, the insane,
cogs-on-the-right standard bicycle kluge. A Rohlhoff hub would help a lot. When
it works, the drive is efficient. The chains are lubed with a dip in solvent
and a little oil and grease. They are dry externally. A fender and flap protect
the drive from dirt. The chain runs clean and free on both the motor and main
drive.

Volt/Amp meters are well integrated. The "dashboard" needs a spacer. I added a
loud bell for the trail and have the little ding bell as well. I rerivited a
desk-lamp headlight to the Minoura Space Bars. It's solid. It needs to be
caulked a little more. They survived a parked-to-pavement fall recently. There
needs to be a parking brake and fork stop.

The rear axle bent and brakes dragged. I disconnected them. I straightened the
axle with arbor press and granite plate. It's fine now. There are hubs with
better axles. Phil Wood is one.

I havne't been out in the woods much.

I have assembled an ugly orange non-shock fork, a front rack, and two folding
baskets. With the baskets, I will carry 8 gallons of milk, plus a loaf of bread
in the soft trunk if the caps aren't installed.

I ran the wires through the shell of the trunk so that I could zip it as OEM
designed.

I have a nice little tire pump with built in gage, works great, never had a
flat. The hammock and rope are there always.

I am on new drugs and losing weight nicely. I rode eight miles recently, more
than in years.

The full promise of this technology has yet to be realized in this working
model. It is not a prototype.

Yours,

Doug Goncz (at aol dot com)
Replikon Research, Seven Corners, VA

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