Required DC gearmotor horsepower to push a bicycle?
 

Specifically... What is the approximate required horsepower for a DC
gearmotor to push a bicycle at 20 mph or less on terrain less hilly
than San Francisco.

Thanks.

Required DC gearmotor horsepower to push a bicycle?
 

....or inch/pounds of torque.

Required DC gearmotor horsepower to push a bicycle?
 

John Doe wrote:
...or inch/pounds of torque.

It depends on the size of the lard bucket sitting on the seat. 1/3 hp net at
the wheel will sustain about 20 mph on the flat, no wind.

Required DC gearmotor horsepower to push a bicycle?
 

On 24 Jan 2011 20:06:01 GMT, John Doe wrote:

Specifically... What is the approximate required horsepower for a DC
gearmotor to push a bicycle at 20 mph or less on terrain less hilly
than San Francisco.

Thanks.
Well, the legal limit in Canada is 350 watts - that's roughly 1/4 HP
in real power output - and is marginal if you do not pedal. I'd say
1/2 HP would be pretty reasonable, and 1 HP much more than adequate.

Required DC gearmotor horsepower to push a bicycle?
 

On 1/24/2011 3:30 PM, wrote:
On 24 Jan 2011 20:06:01 GMT, John wrote:

Specifically... What is the approximate required horsepower for a DC
gearmotor to push a bicycle at 20 mph or less on terrain less hilly
than San Francisco.

Thanks.
Well, the legal limit in Canada is 350 watts - that's roughly 1/4 HP

1/2 HP is about 373 watts.

in real power output - and is marginal if you do not pedal. I'd say
1/2 HP would be pretty reasonable, and 1 HP much more than adequate.

3/5 to 2/3 HP is roughly equivalent to top UCI professional time trial
output.

--
Tºm Shermªn - 42.435731,-83.985007
I am a vehicular cyclist.

Required DC gearmotor horsepower to push a bicycle?
 

On Jan 25, 1:44*am, Tºm Shermªn™ °_° ""twshermanREMOVE\"@THI
$southslope.net" wrote:
On 1/24/2011 3:30 PM, wrote:

On 24 Jan 2011 20:06:01 GMT, John *wrote:

Specifically... What is the approximate required horsepower for a DC
gearmotor to push a bicycle at 20 mph or less on terrain less hilly
than San Francisco.

Thanks.
Well, the legal limit in Canada is 350 watts - that's roughly 1/4 HP

1/2 HP is about 373 watts.

in real power output - and is marginal if you do not pedal. I'd say
1/2 HP would be pretty reasonable, and 1 HP much more than adequate.

3/5 to 2/3 HP is roughly equivalent to top UCI professional time trial
output.

--
Tºm Shermªn - 42.435731,-83.985007
I am a vehicular cyclist.

They better 30mph whatever their output is.

Required DC gearmotor horsepower to push a bicycle?
 

On Mon, 24 Jan 2011 14:51:50 -0600, UglyEcho wrote:

John Doe wrote:
...or inch/pounds of torque.

It depends on the size of the lard bucket sitting on the seat. 1/3 hp net at
the wheel will sustain about 20 mph on the flat, no wind.

Common knowledge has bicyclists always riding into the wind, regardless of
direction, a perception that is not as wrong as it may seem. On level
ground, one rides as fast as is comfortable and because the bicycle is
highly efficient, speed is limited by wind resistance. With a tailwind,
speeding up until the wind is in ones face is fairly easy, and at that
point it becomes a headwind.

Required DC gearmotor horsepower to push a bicycle?
 

The one I know of is abt 1.5 HP with the original tiwanese motor/
controller/batt package

http://groups.google.com/groups?hl=e...-8&sa=N&tab=wg

http://www.google.com/webhp?hl=en&sa...1c9d2b3ccf4dd5

Required DC gearmotor horsepower to push a bicycle?
 

kolldata datakoll yahoo.com wrote:

The one I know of is abt 1.5 HP with the original tiwanese motor/
controller/batt package

http://groups.google.com/groups?hl=e...-8&sa=N&tab=wg

The first two results are Google Groups spam.
--




















http://www.google.com/webhp?hl=en&sa...1c9d2b3ccf4dd5




see also Google Groups
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From: kolldata datakoll yahoo.com
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Subject: Required DC gearmotor horsepower to push a bicycle?
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Required DC gearmotor horsepower to push a bicycle?
 

I don't read it. It's there, you read it. They are us, no ?