Innovative electric bicycle

John B. wrote in
:

On Tue, 28 Apr 2015 13:14:57 +0000 (UTC), John Doe
wrote:

John B. wrote:

John Doe wrote:

I saw something similar on YouTube, so I can't really call it mine.

https://www.youtube.com/watch?v=d9brryyFeBQ

Maybe somebody does this already, I haven't seen it, but seems to me
best would be to put a 16 tooth freewheel on the geared motor shaft
and connect it to the largest sprocket on the crankset.

I'm planning to use a cordless drill.

The cranks will turn when the motor is running, so it might be a
good idea to have foot pegs. Also, when pedaling the motor chain is
driven, but that's a tiny loss of efficiency. The cordless drill has
a slip clutch, so there is no concern about massive torque on one's
feet.

Otherwise it looks very easy except for mounting the motor.

You might look at the "Whizzer motor bicycle". It had a gasoline
engine driving the rear wheel which eliminated all the fuss and muss
of having the pedals spinning around when motoring :-)

As the rear wheel was driven through a vee belt there was a simple
tensioning pulley to allow the engine belt to be loosened when
pedaling.

Nowhere near as simple as mounting the engine and just strapping a
chain around the other crankset sprocket. Mounting the engine isn't
simple, but the design couldn't be any simpler for what it does.

True, although the Whizzer used a bolt on pulley on the rear wheel
which is a much simpler modification then fitting extra sprockets to
the pedals.

The pedals spinning is a drawback if end are concerned about injury?
You could also hurt yourself while "exercising" or "popping the top on
a tinnie"? So there is no reason to wear a helmet while cars are
zipping past you at 60 mph, but spinning pedals are a health hazard?
That's so confusing!

To stop the pedals from spinning, you just let off of the throttle.

Not really a desirable thing to do; going up hill :-)

I suspect it would be the only way to allow motor assisted pedaling, for
power coming from both person and machine.

Also possible is that the pedals be removed and used only if and when
the battery(s) dies. Then the crankset is less of an obstacle (still
using footpegs). Preferably some sort of quick-attach pedals, if
possible.

I do have to figure out where to put foot pegs. My crank arms are kind
of long. Foot pegs are common accessory on a motorcycle.

Besides the fact that there is no simpler design, which matters a lot
when you build something, the spinning pedals provide dual power. It's
also very efficient given a dual sprocket crankset. It's just the
thing for my otherwise unused 42 tooth sprocket.

Gas or electric makes little difference to the design, they are both a
spinning shaft. Just depends on your personal preference. The benefit
to gas is much longer travel. But DeWalt cordless drills now have five
amp hour batteries. Not great, but usable. And it will only get
better.

Are you sure about 5 amp hours? the DCD 980M2 seems to be listed with
a 3 AH battery, which depending on how it is rated may not be enough
for more then very short rides.

http://www.dewalt.com/tool-categorie...ss-drills.aspx

The DCD980M2 comes with two 4 amp hour batteries, in my browser.

The DCB205 is their 5 amp hour battery. It's $150 (US) for a pair on
Amazon. Currently I have one 4 amp hour battery (DCB204). Good enough
for testing.

The DCD 980M2, for example is stated to produce 535 UWO so would
require something in the neighborhood of 26-3/4 amps at full rated
battery voltage (20 VDC) so a 5 WH battery would theoretically last,
what, 11 Minutes? But only if the battery was capable of producing
full rated voltage at maximum current draw.

I have a good idea of real-world performance, given my experience with
inline skating push sticks. Then using 2.6 amp hour NiCads.

I also have some experience using gasoline engines. And some bright
white Nike T-shirts that are now speckled with two-stroke muffler spit.

John B. wrote:
John Doe wrote:

Nowhere near as simple as mounting the engine and just strapping a
chain around the other crankset sprocket. Mounting the engine isn't
simple, but the design couldn't be any simpler for what it does.

True, although the Whizzer used a bolt on pulley on the rear wheel
which is a much simpler modification then fitting extra sprockets to
the pedals.

The extra sprocket(s) is part of a retail crankset.

On Tue, 28 Apr 2015 13:32:31 -0500, AMuzi wrote:

On 4/28/2015 1:00 PM, Frank Krygowski wrote:
On Tuesday, April 28, 2015 at 10:49:12 AM UTC-4, John Doe wrote:
For anyone who enjoys reading bull****, this troll should try to explain
what the imaginary "several problems you will encounter" are.

A full of **** troll...

--
AMuzi am yellowjersey.org wrote:

Mr Slocomb's suggestion of a Whizzer is well considered

http://s725.photobucket.com/user/the...01-00.jpg.html

Several of the problems you will encounter were addressed
nicely in that design.

Wow. It's unfortunately not uncommon for civil, helpful posts to get
labeled as trolling; but I think Mr. Doe just set a couple different records.

Mr. Doe, you now have an opportunity to build your contraption and prove to
us that you know more than 1/100th of what Andrew Muzi knows.

Good luck. You'll need it.

- Frank Krygowski


I have installed various gas and electric systems for
customers and have wrangled with general formatting issues.

The motivated users are frequently victims of nerve damage
or other injury/frailty/decrepitude such that a constantly
engaged powered drive chain would have been a serious
hazard. Even for a normal human, I would refuse to set up
such a thing.

One project for a woman with MS concluded with a
rack-mounted small motor driving the left side of a double
sided hub with a reverse freewheel and full chain case.
Quite a lot of fabrication but it suited her needs. YMMV.

Since the vehicle becomes unwieldy for carrying up stairs
anyway, I think most of these projects are less useful and
more expensive than a small moped, but people have their own
views.

The French "Solex" was probably the simplest "motor bike". It was just
a small 2-stroke motor driving a "pulley " that rested on the front
tire. The motor was pivoted and the weight of the motor kept the
pulley in contact with the tire. There was a lever, with a latch, that
would hold the motor away from the wheel.

To ride it, the motor was latched up, away from the wheel, and the
bike was ridden like a normal bike. If you wanted more power you
simply flipped the lever, the motor and drive pulley dropped down onto
the spinning front wheel, which started the motor, and away you went.

I saw them in use in Vietnam and while they probably weren't exactly
the "cat's meow" for riding in the alps they certainly seemed adequate
for flatter country.
--
cheers,

John B.

On 4/28/2015 9:19 PM, John B. wrote:
On Tue, 28 Apr 2015 13:32:31 -0500, AMuzi wrote:

On 4/28/2015 1:00 PM, Frank Krygowski wrote:
On Tuesday, April 28, 2015 at 10:49:12 AM UTC-4, John Doe wrote:
For anyone who enjoys reading bull****, this troll should try to explain
what the imaginary "several problems you will encounter" are.

A full of **** troll...

--
AMuzi am yellowjersey.org wrote:

Mr Slocomb's suggestion of a Whizzer is well considered

http://s725.photobucket.com/user/the...01-00.jpg.html

Several of the problems you will encounter were addressed
nicely in that design.

Wow. It's unfortunately not uncommon for civil, helpful posts to get
labeled as trolling; but I think Mr. Doe just set a couple different records.

Mr. Doe, you now have an opportunity to build your contraption and prove to
us that you know more than 1/100th of what Andrew Muzi knows.

Good luck. You'll need it.

- Frank Krygowski


I have installed various gas and electric systems for
customers and have wrangled with general formatting issues.

The motivated users are frequently victims of nerve damage
or other injury/frailty/decrepitude such that a constantly
engaged powered drive chain would have been a serious
hazard. Even for a normal human, I would refuse to set up
such a thing.

One project for a woman with MS concluded with a
rack-mounted small motor driving the left side of a double
sided hub with a reverse freewheel and full chain case.
Quite a lot of fabrication but it suited her needs. YMMV.

Since the vehicle becomes unwieldy for carrying up stairs
anyway, I think most of these projects are less useful and
more expensive than a small moped, but people have their own
views.

The French "Solex" was probably the simplest "motor bike". It was just
a small 2-stroke motor driving a "pulley " that rested on the front
tire. The motor was pivoted and the weight of the motor kept the
pulley in contact with the tire. There was a lever, with a latch, that
would hold the motor away from the wheel.

To ride it, the motor was latched up, away from the wheel, and the
bike was ridden like a normal bike. If you wanted more power you
simply flipped the lever, the motor and drive pulley dropped down onto
the spinning front wheel, which started the motor, and away you went.

I saw them in use in Vietnam and while they probably weren't exactly
the "cat's meow" for riding in the alps they certainly seemed adequate
for flatter country.


Yep, used to be popular. Paul McCartney broke out his front
teeth on one.

A later similar design from Tanaka was lighter and much quieter.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On 29/04/15 12:19, John B. wrote:


The French "Solex" was probably the simplest "motor bike". It was just
a small 2-stroke motor driving a "pulley " that rested on the front
tire. The motor was pivoted and the weight of the motor kept the
pulley in contact with the tire. There was a lever, with a latch, that
would hold the motor away from the wheel.

To ride it, the motor was latched up, away from the wheel, and the
bike was ridden like a normal bike. If you wanted more power you
simply flipped the lever, the motor and drive pulley dropped down onto
the spinning front wheel, which started the motor, and away you went.

I saw them in use in Vietnam and while they probably weren't exactly
the "cat's meow" for riding in the alps they certainly seemed adequate
for flatter country.

I rode a bicycle fitting that description in about 1987. It was not
mine, but a friends. Very fun.

--
JS

Florida passed a legal 50cc bicycle no plates/ins law...a few 50B's shpwed ...RUNNING FLAT OUT...with nab motorized skateboards terrorizing ground owls...

8 ? years later...no 50B's


....................

http://goo.gl/yfmJIf