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Main
Date: 10 Aug 2006 18:16:42
From: The Dougster
Subject: Electrified Thunderbolt
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Hello, arbr.
I've been working on an "electric flywheel" for more than five years.
You may have read the MOEPED posts. Basically, a motor/generator in
parallel with an ultracapacitor bank acts just like a big fat mass
flywheel with a fluid clutch. The electrical constants of the motor
determine the characteristics of the analgous fluid clutch.
With energy stored at electrical equilibrium proportional to the square
of speed, a bicycle with electric flywheel offers a riding strategy not
available to unequipped bicycles. Descending hills or taking a long run
at a coming hill provides enough energy storage to assist in a climb.
Who's to say whether this is useful in a race? Not me. It's just fun to
try new things.
My Pookie says my Lightning Cycle Dynamics Thunderbolt recumbent looks
like a lawn chair on wheels as it comes stock, and more like
Chitty-Chitty-Bang-Bang with the tricks. I've got a 600 watt, 36 volt
Wilderness EV front hub on it, and 6 Maxwell 2700 F ultracapacitors in
series in the rack trunk. The Samlex sine wave inverter powers just
about anything. There's a bit of lighting track under the boom with a
14 watt compact fluorescent flood for rides through the park in the
dark, and there will soon be a 20 watt G.E. ceramic metal halide spot
lamp on the track for road illumination.
One of the fun things I have done with the bike is a roll-out contest.
I pedaled round and round in a circle, slowly building up speed, then
coasted for around five minutes. What fun!
Still not too heavy to lift onto the bus bike rack either.
Just thought I'd check in.
Doug Goncz
Replikon Research
Seven Corners, VA 22044-0394
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Date: 12 Aug 2006 03:09:58
From: The Dougster
Subject: Re: Electrified Thunderbolt
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Well, hi, Johnny Sunset!
This could be arranged. The hub is available in 20, 24, and 26 inch
rims. The caps fit in a rack bag. I am sticking with LIghtning for now,
and hope to have a better model than their low-ball Thunderbolt by
2010.
In 2009, I will be demonstrating the electric flywheel at MIT, at the
EGS Reunion.
What's the Cheddar ucrtain made of? Sharp or extra sharp? Is that a
reference to some Englander situation?
Doug
Johnny Sunset aka Tom Sherman wrote:
> The Dougster aka Doug Goncz wrote:
> > ...
> > With energy stored at electrical equilibrium proportional to the square
> > of speed, a bicycle with electric flywheel offers a riding strategy not
> > available to unequipped bicycles. Descending hills or taking a long run
> > at a coming hill provides enough energy storage to assist in a climb....
>
> This system would be rather interesting if coupled with a street
> ride-able hard-shell streamliner, e.g. Rotator Coyote [1].
>
> [1]
> <http://www.recumbents.com/wisil/racing2004/SanJose/Amick/Dean%20Pederson%20in%20Rotator%20Coyote.jpg>.
>
> --
> Tom Sherman - Behind the Cheddar Curtain
> Post Free or Die!
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Date: 11 Aug 2006 18:14:08
From: Johnny Sunset aka Tom Sherman
Subject: Re: Electrified Thunderbolt
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The Dougster aka Doug Goncz wrote:
> ...
> With energy stored at electrical equilibrium proportional to the square
> of speed, a bicycle with electric flywheel offers a riding strategy not
> available to unequipped bicycles. Descending hills or taking a long run
> at a coming hill provides enough energy storage to assist in a climb....
This system would be rather interesting if coupled with a street
ride-able hard-shell streamliner, e.g. Rotator Coyote [1].
[1]
<http://www.recumbents.com/wisil/racing2004/SanJose/Amick/Dean%20Pederson%20in%20Rotator%20Coyote.jpg >.
--
Tom Sherman - Behind the Cheddar Curtain
Post Free or Die!
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Date: 11 Aug 2006 16:05:49
From: The Dougster
Subject: Re: Electrified Thunderbolt
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I weighed the electric flywheel bike today. It's 74 pounds.
Doug
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