CVT interest

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

I think it would be terrific, if it really had no efficiency loss and no
weight penalty. However, there is nothing yet available that comes
close to meeting that standard.

I also think that you are some sort of troll, because you are writing
anonymously about some scheme to get cyclists to transfer money to you.

I think you should be more upfront. Do you have some links or detailed
descriptions of the mechanism?

--
Ted Bennett

Ted Bennett wrote:
wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

I think it would be terrific, if it really had no efficiency loss and no
weight penalty. However, there is nothing yet available that comes
close to meeting that standard.

I also think that you are some sort of troll, because you are writing
anonymously about some scheme to get cyclists to transfer money to you.

I think you should be more upfront. Do you have some links or detailed
descriptions of the mechanism?

--
Ted Bennett

I am in the process of developing such a device. I was trying to get
an idea of the market interest before I begin funding the prototype, as
I am funding the project with my own money. I did not post that to
begin with because I wanted responces about a desire for the concept,
not a debate about weather or not people think I actually have a design
that works. I will not post a description of the mechanism. Thanks
for your responce.

Tim Knodel

On 2 Jun 2006 15:39:47 -0700, wrote:


Ted Bennett wrote:
wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

I think it would be terrific, if it really had no efficiency loss and no
weight penalty. However, there is nothing yet available that comes
close to meeting that standard.

I also think that you are some sort of troll, because you are writing
anonymously about some scheme to get cyclists to transfer money to you.

I think you should be more upfront. Do you have some links or detailed
descriptions of the mechanism?

--
Ted Bennett

I am in the process of developing such a device. I was trying to get
an idea of the market interest before I begin funding the prototype, as
I am funding the project with my own money. I did not post that to
begin with because I wanted responces about a desire for the concept,
not a debate about weather or not people think I actually have a design
that works. I will not post a description of the mechanism. Thanks
for your responce.

Tim Knodel

Dear Tim,

Before you try to re-invent a wheel that's repeatedly failed to work
well, you might browse through these threads:

http://groups.google.com/group/rec.b...t=0&scoring=d&

There's plenty of desire for a light, efficient, reliable CVT on a
bicycle, but no one seems to have invented one in the last century.

Cheers,

Carl Fogel

wrote:

There's plenty of desire for a light, efficient, reliable CVT on a
bicycle, but no one seems to have invented one in the last century.


I'd characterize it as curiosity rather than desire. I don't really see
any market demand for such a thing. I see people thinking the Rohloff
internal gear hub is pretty cool but way too expensive for most of the
target consumers that might actually buy one otherwise; I'd guess this
CVT would get a similar reception, assuming it's as good as the OP
described.

I wouldn't invest my money in bringing it to market; my opinion is worth
nothing but he did ask.

In article
.com,
wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

Power transmission efficiency of 0.92? Weight? Simplicity?
Robust? CVTs have been built, but all fail in all four
categories. I predict such a device will not happen in
the next ten years.

--
Michael Press

On 2 Jun 2006 12:35:51 -0700, wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

Well, since the stated criteria have never been approached, and are
exceptionally unlikely to be met by anything with reasonable
durability and an affordable cost, there's not much point, is there?

Seriously, every CVT thus far introduced has either failed to live up
to the claims made for it, and/or has had a short life expectancy,
and/or has been overly expensive; some combination of the three.

The record in the automotive field is similar. Hondas with a CVT have
a near-zero value at wholesale in this area; not even the least
reputable garage-lot car peddlers will take a chance on them.

If someone came to me with a claim that they had such a device, I
would regard the person as a prima facie liar. I might be polite, I
might be courteous, I might listen to the pitch, but my checkbook
would remain out of sight and I would sign nothing.


--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

There used to be a bicycle called the Yankee Bike that was eventually bought
by Nordic Track before they eliminated it. The claim to fame of this bike
was a single rear rim band brake and a front crank that continuosly varied
in and out to change the gear ratios.

There was a pully/chain tensioner in the rear with a single cog. All the
"gears" were done by the movement within the crank. Several stems/teeth
would move in and move out to change the diameter of the crank.

wrote:
I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

I think it's a fantastic idea, perhaps the most exciting I've ever heard,
one that will surely revolutionize cycling. I encourage you to mortgage
your home and cash in your children's college savings accounts. You've got
a sure winner. Years from now, when grateful riders speak your name they
will do so not on their bikes but rather on the ground--because one must
needs kneel and bare one's head to show the proper reverence. I'm sure you
can succeed where so many others have failed, in part because you have
already demonstrated your keen judgement and razor sharp business acumen
by asking anonymous guys on the 'net for advice.

in message .com,
') wrote:

I am curious about the amount of interest out there in both the
recreation/commuting community and the racing community for a true CVT
a manual gear system that had infinite variability, the same gear range
as a 27 speed system, no loss in efficiency and no weight gain. What
do you think?

/If/ you could make a true CVT with as little loss as a derailleur, I
think there'd be a lot of interest. I'd certainly be interested,
although more for mountain bikes than for road ones. I have played about
with ideas of a DAF-type opposed cone drive myself.

But a racing bicycle is a low power vehicle where inefficiencies in the
transmission make a real difference to performance, so you really would
have to make it as efficient as a derailleur system.

--
(Simon Brooke) http://www.jasmine.org.uk/~simon/

Due to financial constraints, the light at the end of the tunnel
has been switched off.