What is a bicycle?

On Thu, 19 May 2005 10:07:37 +1000, [email hidden]

(Peter McCallum) said:

The national road rules define it as:
"bicycle"-- (a) means a vehicle with 1 or more wheels (including a
pedicab, penny farthing, scooter, tricycle and unicycle) built to be
propelled by human power through a belt, chain or gears

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

The very tall unicycles have chains and gears, they get used by
circus types/clowns/jugglers

Carl Brewer <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

The very tall unicycles have chains and gears, they get used by
circus types/clowns/jugglers

Ahem, and non-circus types too! I was going to say "normal people" but
that's probably stretching the definition of normal a bit too far 🙂

Graeme

Peter McCallum said:

The national road rules define it as:
"bicycle"-- (a) means a vehicle with 1 or more wheels (including a
pedicab, penny farthing, scooter, tricycle and unicycle) built to be
propelled by human power through a belt, chain or gears

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

--
Peter McCallum
Mackay Qld AUSTRALIA

where's the skateboard?

Graeme said:

Carl Brewer <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

The very tall unicycles have chains and gears, they get used by
circus types/clowns/jugglers

Ahem, and non-circus types too! I was going to say "normal people" but
that's probably stretching the definition of normal a bit too far 🙂

Graeme

Most physics departments will have one around...

Tam

Tamyka Bell said:

Most physics departments will have one around...

Tam

WOT? A 'NORMAL PERSON'??? doubtful 😄

flyingdutch said:

Tamyka Bell said:

Most physics departments will have one around...

Tam

WOT? A 'NORMAL PERSON'??? doubtful 😄

--
flyingdutch

Oh God no, not one of them. Unless you mean the cleaners?

Hehehe.

Peter McCallum said:

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

Some Penny Farthings had gears. Pedals were mounted on a bearing on the fork
above the axle and powered the axle via a gear. God knows how much weight
that added.

Theo

That definition has changed(ing), exluding scooters and unicycles now. So
there ya go. (already changed definition here in SA)
"Peter McCallum" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

The national road rules define it as:
"bicycle"-- (a) means a vehicle with 1 or more wheels (including a
pedicab, penny farthing, scooter, tricycle and unicycle) built to be
propelled by human power through a belt, chain or gears

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

--
Peter McCallum
Mackay Qld AUSTRALIA

Carl Brewer said:

On Thu, 19 May 2005 10:07:37 +1000, [email hidden]

(Peter McCallum) said:

The national road rules define it as:
"bicycle"-- (a) means a vehicle with 1 or more wheels (including a
pedicab, penny farthing, scooter, tricycle and unicycle) built to be
propelled by human power through a belt, chain or gears

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

The very tall unicycles have chains and gears, they get used by
circus types/clowns/jugglers

Well all I can say is they better keep at least one hand on the
handlebars if they are going to ride it on the highway.

P
--
Peter McCallum
Mackay Qld AUSTRALIA

On Thu, 19 May 2005 12:37:51 +1000, Tamyka Bell <[email hidden]>

Quoted message said:

flyingdutch said:

Tamyka Bell said:

Most physics departments will have one around...

Tam

WOT? A 'NORMAL PERSON'??? doubtful 😄

Oh God no, not one of them. Unless you mean the cleaners?

Hehehe.

Physics departments are full of normal people. Well ... they used to
be when I was at uni in the last millenium. Maths departments, OTOH,
are something else indeed. But the strangest (in a WTF, but nice, way)
people I ever met were in the dept of theoretical physics and applied
mathematics. A total disconnect (not even getting NAKs) between their
minds and reality. Really, really strange. Barking wibble fish hat
stands. But nice.

--
Regards.
Richard.

flyingdutch <[email hidden]> wrote in
news:[email hidden]:

Quoted message said:

Peter McCallum said:

The national road rules define it as:
"bicycle"-- (a) means a vehicle with 1 or more wheels (including a
pedicab, penny farthing, scooter, tricycle and unicycle) built to be
propelled by human power through a belt, chain or gears

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

--
Peter McCallum
Mackay Qld AUSTRALIA

where's the skateboard?

Wheeled recreational vehicle and specifically excluded from the
definition of a vehicle ergo not permitted on roads or bike paths.

Cheers

BrettM

Gemma_k said:

That definition has changed(ing), exluding scooters and unicycles now. So
there ya go. (already changed definition here in SA)

How do they define a bicycle now? Does it have to have at least 2
wheels? Still require a chain?

Peter
--
Peter McCallum
Mackay Qld AUSTRALIA

"Peter McCallum" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Gemma_k <[email hidden]> wrote:

Quoted message said:

How do they define a bicycle now? Does it have to have at least 2
wheels? Still require a chain?

This is the definition of 'bicycle' from the Australian Road Rules in SA,
full set of rules found
here:http://www.parliament.sa.gov.au/Catalog/legislation/Regulations/a/1999.219.un.htm
bicycle means a vehicle with 2 or more wheels that is built to be propelled
by human power through a belt, chain or gears (whether or not it has an
auxiliary motor), and:

(a) includes a pedicab, penny-farthing and tricycle; but

(b) does not include a wheelchair, wheeled recreational device,
wheeled toy, or any vehicle with an auxiliary motor capable of generating a
power output over 200 watts (whether or not the motor is operating).

Note-

Vehicle is defined in rule 15, and wheelchair, wheeled recreational device
and wheeled toy are defined in this dictionary.

On Thu, 19 May 2005 10:07:37 +1000, [email hidden]
(Peter McCallum) wrote in aus.bicycle:

Quoted message said:

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

The fact that the crank diameter is smaller than the wheel they propel
makes them a gear doesn't it? (I don't know whether that is clutching
at straws)

Regards
Bruce

Bruce Coward Liar said:

On Thu, 19 May 2005 10:07:37 +1000, [email hidden]
(Peter McCallum) wrote in aus.bicycle:

Quoted message said:

I wonder how many Penny Fathings, unicycles or scooters are propelled
through belts, chains or gears?

The fact that the crank diameter is smaller than the wheel they propel
makes them a gear doesn't it? (I don't know whether that is clutching
at straws)

Of course it does. When James Watt made the improved steam engine he had
to wait several years for the patent to expire on the crankshaft because
it was held by somebody else and he didn't want to pay license fees.
Prior to that he used an epicyclic gear system. It seems strange that
something as simple as a cranshaft would be "owned" by someone. A bit
like Microsoft I suppose.

Marty

Quoted message said:

Regards
Bruce