Suspended chain ring

"Garry Jones" wrote: (clip) Can anyone explain the need for suspension
springs in the chain rings?
^^^^^^^^^^^^^
:-) Very neat design. Serves the useful purpose of turning a profit. If
the manufacturer is lucky, and the bicycling public is gullible, they may
recover their tooling costs. If we're smart, it will go the way of Biopace
chain rings.

Garry Jones composed the following;:

Quoted message said:

Amazingly, this is not a joke.

http://www.hisingensck.se/texter-bilder/ovrigt/2005/bilder/050129/IMAG0154_stor.jpg

Can anyone explain the need for suspension springs in the chain rings?

....and I thought I'd seen it all!

I thought there was something like this a few years ago too. The
explanation was something to do with the springs storing energy whilst
on the downward power stroke, and releasing it on the upward return
stroke of a normal pedalling action. This helps, the claim went, to
iron out the power impulses inherent from pedalling. I'd guess this
acts a bit like the 'cush drive' in motorcycle rear wheels.

I can't find a link for it now though. 🙂

--
The Caretaker.
www.4x4prejudice.org
A balanced argument.

re: BikeDrive chainrings

It's not a suspension, it's a device to improve efficiency (so
claimed.) It's supposed to even out the power, storing it when then
cranks are horizontal, and releasing it when they're vertical.
Sort of like Biopace with moving parts.

On Sun, 30 Jan 2005 19:40:48 +0100, Garry Jones <[email hidden]>

may have said:

Amazingly, this is not a joke.

http://www.hisingensck.se/texter-bilder/ovrigt/2005/bilder/050129/IMAG0154_stor.jpg

Can anyone explain the need for suspension springs in the chain rings?

There isn't one.

It's possible that this may have been done in emulation of the
spring-equipped hubs of automotive engine clutch discs, where the
springs have a very definite level of usefulness...but their
functionality here is questionable at best. The human leg does not
engage in the same kind of power production cycle that the piston
engine does.

The mere fact that an idea has no valid basis and is nonsensical in
fact will not prevent some people from spending the money to prove
that it was not a good one...and denying the results.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

Werehatrack said:

The mere fact that an idea has no valid basis and is nonsensical in
fact will not prevent some people from spending the money to prove
that it was not a good one...and denying the results.

Amazing statement in a thread that's not about helmets....

(yet)

🙂

Garry Jones
English Cyclist ResIDING in Sweden

Garry Jones said:

Amazingly, this is not a joke.

http://tinyurl.com/4vnay

Quoted message said:

Can anyone explain the need for suspension springs in the chain
rings?

This is a joke, and obviously for oldsters who want to put a little
bounce in their stride on the bicycle. It goes with hair restorer and
other such gimmicks. Geritol works wonders!

http://geritol.com/

Jobst Brandt
[email hidden]

On Sun, 30 Jan 2005 13:22:26 -0600, Werehatrack <[email hidden]>

Quoted message said:

On Sun, 30 Jan 2005 19:40:48 +0100, Garry Jones <[email hidden]>

may have said:

Amazingly, this is not a joke.

http://www.hisingensck.se/texter-bilder/ovrigt/2005/bilder/050129/IMAG0154_stor.jpg

Can anyone explain the need for suspension springs in the chain rings?

There isn't one.

It's possible that this may have been done in emulation of the
spring-equipped hubs of automotive engine clutch discs, where the
springs have a very definite level of usefulness...but their
functionality here is questionable at best. The human leg does not
engage in the same kind of power production cycle that the piston
engine does.

The mere fact that an idea has no valid basis and is nonsensical in
fact will not prevent some people from spending the money to prove
that it was not a good one...and denying the results.

I consider it part of the monkey principle. If all of us monkeys don't go
banging our typewriters with enthusiasm, oblivious to the obvious nonsensicality
of monkeys banging on typewriters, then that Shakespearean sonnet will never get
written.

Or the answer won't come out to be 42. However you want to look at it.

Ron

On Sun, 30 Jan 2005 19:44:14 GMT, RonSonic <[email hidden]>

may have said:

I consider it part of the monkey principle. If all of us monkeys don't go
banging our typewriters with enthusiasm, oblivious to the obvious nonsensicality
of monkeys banging on typewriters, then that Shakespearean sonnet will never get
written.

The more conventional approach (if you want Shakespeare, hire him) is
lost on the average tinkerer.

Quoted message said:

Or the answer won't come out to be 42. However you want to look at it.

Before you can get the answer to be 42, you must know what base to use
for the problem. (13, in this case.)

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

On 30 Jan 2005 11:18:52 -0800, "Brian Huntley"

may have said:

re: BikeDrive chainrings

It's not a suspension, it's a device to improve efficiency (so
claimed.) It's supposed to even out the power, storing it when then
cranks are horizontal, and releasing it when they're vertical.
Sort of like Biopace with moving parts.

Flawed theory. The problem behind it should be obvious.

All those springs will do in this application is convert a little of
the rider's energy to heat via flexing, if sufficient force is
applied.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

Quoted message said:

Garry Jones said:

Amazingly, this is not a joke.

http://tinyurl.com/4vnay

Quoted message said:

Can anyone explain the need for suspension springs in the chain
rings?

This is a joke, and obviously for oldsters who want to put a little
bounce in their stride on the bicycle. It goes with hair restorer and
other such gimmicks....

Judging from this thread, the crankset in question functions admirably
as a conversation piece.

--
Tom Sherman - Earth

Here's the site link:
http://www.bikedrive.com/english/index.htm

They don't look like they are joking...

On Sun, 30 Jan 2005 14:55:50 -0600, Tom Sherman

may have said:

Quoted message said:

Garry Jones said:

Amazingly, this is not a joke.

http://tinyurl.com/4vnay

Quoted message said:

Can anyone explain the need for suspension springs in the chain
rings?

This is a joke, and obviously for oldsters who want to put a little
bounce in their stride on the bicycle. It goes with hair restorer and
other such gimmicks....

Judging from this thread, the crankset in question functions admirably
as a conversation piece.

It's not heavy enough to use as a lamp base or a boat anchor, and it
would need a lot of work to make a decent pizza cutter.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

hhu uuhh may have said:

Here's the site link:
http://www.bikedrive.com/english/index.htm

They don't look like they are joking...

Neither was Velikovsky.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

Werehatrack said:

hhu uuhh may have said:

Here's the site link:
http://www.bikedrive.com/english/index.htm

They don't look like they are joking...

Neither was Velikovsky.

Indeed, Bart Hughes and Amanda Fielding are quite serious about their
particular performance enhancing technique.

The mere fact that an idea has no valid basis and is nonsensical in fact
will not prevent some people from spending the money to prove that it was
not a good one...and denying the results.
^^^^^^^^^^^^^
I'm standing on my head trying to understand which way this was meant.

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

Quoted message said:

Quoted message said:

Or the answer won't come out to be 42. However you want to

look at it.

Quoted message said:

Before you can get the answer to be 42, you must know what

base to use

Quoted message said:

for the problem. (13, in this case.)

Need help.
I understand "42", which is a reference to one of the
"Hitchhiker's Guide" books.
I don't understand the base 13 reference (or it's simply been
a while since I read Adams).

Take a look at the Web site: http://www.bikedrive.com/english/index.htm

"Olebiker" wrote: Take a look at the Web site (clip)
^^^^^^^^^^^^^^^
I just did. They claim that you store energy in the springs at top dead
center, and release it at bottom dead center. Evidently this system is
applicable only to one-legged riders, since, while the right foot is at top
dead center, the left foot would be at bottom dead center, if you had one.

On Sun, 30 Jan 2005 14:20:39 -0600, Werehatrack <[email hidden]>

Quoted message said:

On Sun, 30 Jan 2005 19:44:14 GMT, RonSonic <[email hidden]>

may have said:

I consider it part of the monkey principle. If all of us monkeys don't go
banging our typewriters with enthusiasm, oblivious to the obvious nonsensicality
of monkeys banging on typewriters, then that Shakespearean sonnet will never get
written.

The more conventional approach (if you want Shakespeare, hire him) is
lost on the average tinkerer.

That's not his job as a type-monkey.

Or banging the rocks together. It's really little different in terms of being
primate behavior and having occasional positive results

Quoted message said:

Quoted message said:

Or the answer won't come out to be 42. However you want to look at it.

Before you can get the answer to be 42, you must know what base to use
for the problem. (13, in this case.)

Hrrruuuhhhh?

Ron