Quoted message said:Michael Press said:In article <[email hidden]>,
MagillaGorilla said:Remove a wheel and hold it perpendicular to the ground (the same as if
it were mounted on your bike). Spin it as fast as you can and then
suddenly bank the wheel at a 40-degree angle. That tremndous resistance
you feel is a negative effect that increases with the speed of your
wheel and only exists in a turn and serves to bleed energy along with
friction, increased rolling resistance, and negative physiological
effects (both circulatory and vertigo).
Once again, force perpendicular to the velocity does no work.
Study dynamics. Do not lecture those who know.
What you write is cargo cult physics. You know nothing.
You string words and phrases dropped by those who know
into bright plausible spangly icons of the original.
You know nothing. Those who give you the benefit of
the doubt can interpret some of your constructions as
being sort of true in a good light with a following wind.
The big giveaway is that you cannot discriminate what
is true in the replies you get.
--
Michael Press
Thanks Mike, I could not have answered like this myself. Closest I was
to Oxford was driving by, once.
In my last reply to Magilla, which did not show up here, I was trying
to explain the acceleration when entering turn comparing it to
piruette balet dancers or figure skaters can perform by pulling arms
in. Corellis (?) effect, I think it was called.
It is practically negligible riding on velodrome, riders are more
likely to feel slightly higher pedaling rpms, but only on small
tracks. I don't want to get into explaining that, now.
Peter Junek
The Coriolis effect has absolutely nothing to do with anything that
happens on a velodrome. And the figure skater effect has little
correlation to what happens in a velodrome turn because the rider is not
tethered to a stake in the middle of the velodrome.
A figure skater spins faster as they bring their arms inward because of
the laws of conservation of angular momentum. So as you bring more mass
in towards the cetner of torque, energy is mmostly conserved so it
results in a faster spin.
In cycling around a velodrome turn, you are constantly changing your
angular momentum, which requires a force. In a straight-away you are
CONSERVING your LINEAR momentum.
I agree that the center of mass argument would result in a faster tire
travel speed IF YOU ISOLATE THIS VARIABLE. However, in a turn, this is
not the only thing that is occurring.
In order to change a rider's linear inertia, it requires a force. That
force comes from the velodrome turn and the rider's lean and physical
inputs. All of these things result in increased friction, increased
rolling resistance, negative physiological effects, increased
aerodynamic drag.
When you crunch all the math - which we have yet to do - it's gonna show
a turn has a net inefficiency which results in not only a decreased
speed, but a decrease in watts. And that lost energy is converted to
heat in the form of friction.
On a straightaway you have no similar energy loss, no increased
aerodynamic loss, no physiological negatives.
Believe it or not, calling me names isn't going to change any of this.
Magilla
