Hats?

On 27 Jul 2004 11:16:13 +0100, Ambrose Nankivell
<[email hidden]> wrote (more or less):

Quoted message said:

Gawnsoft said:

On Tue, 27 Jul 2004 06:06:41 +0100, anonymous coward
<[email hidden]> wrote (more or less):
...

Quoted message said:

What do you mean by flukery - the fact that occasionaly an accident
happens that is not a worst-case scenario? In cycling the situation is
opposite to that of parachuting.

That things happen that are statistical outliers. Or at least many
standard deviations away from the median experience.

<pedant>Standard deviations are only relevent to the mean, surely.</pedant>

They're calculated using the mean. That doesn't mean to say they have
no indicative power relative to the median. </pedan> :-)

--
Cheers,
Euan
Gawnsoft: http://www.gawnsoft.co.sr
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On 27 Jul 2004 11:17:39 +0100, Ambrose Nankivell
<[email hidden]> wrote (more or less):

Quoted message said:

Mark Tranchant said:

Gawnsoft said:

Does this invalidate the many studies that show that jumping out of a
plane in flight without a parachute is a good thing? No.

I hope you mean "...is *not* a good thing".

I kind of assume that there are very few formal studies about whether
it's good to wear a parachute jumping out of a plane. There was one
pretty conclusive one that it's a good idea when jumping from a
balloon, but since then, no one's bothered to check that it's still
the case.

That's because physiology hasn't changed since. Flying heights have
not got significantly lower since. And flight speeds have not got
significantly lower since.

:-)

Unless there's some new variable we ought to be checking?

--
Cheers,
Euan
Gawnsoft: http://www.gawnsoft.co.sr
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On Mon, 26 Jul 2004 16:07:00 +0100, "Steve Almond" wrote (more or
less):
....

Quoted message said:

Very clever. Your attachment to 7 mph is touching.

Not my attachment to 7mph.

7mph is the /extreme/ outside of the performance envelope of the very
/best/ bicycle helmet.

(it does assume things like average cyclist height and not having an
unusually weighty head).

As it happens, my personal cycling takes place at between 8km/h
(uphill) and 25km/h (downhill) (although I once hit 30.1 on a fast
downhill), with lots of 14-19 on the flat.

(these equate to the embarassing figres of approx. 5mph, 16mph, 19mph,
9mph, 12mph)

....
--
Cheers,
Euan
Gawnsoft: http://www.gawnsoft.co.sr
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Gawnsoft said:

As it happens, my personal cycling takes place at between 8km/h
(uphill) and 25km/h (downhill) (although I once hit 30.1 on a fast
downhill), with lots of 14-19 on the flat.

(these equate to the embarassing figres of approx. 5mph, 16mph, 19mph,
9mph, 12mph)

....

What are you riding if a "fast" downhill is 19mph?! I think my
grandmother's well-rusted Raleigh Twenty would exceed 20mph down most hills!

--
Mark.

Mark Tranchant said:

What are you riding if a "fast" downhill is 19mph?! I think my
grandmother's well-rusted Raleigh Twenty would exceed 20mph down most
hills!

There's a hill near me on which I /can/ reach 40mph on my "road" bike,
traffic allowing. Coming down the same hill yesterday on the hybrid I
can't have been doing more than 25mph absolute tops. I didn't have a
speedo fitted, but it felt /slooooooow/. That's the difference narrow,
slick, high-pressure tyres can make.

d.

Gawnsoft said:

That's because physiology hasn't changed since. Flying heights have
not got significantly lower since. And flight speeds have not got
significantly lower since.

I don't know about that but when I was an air cadet I used to go up in
Chipmunks, which are fairly low, slow-flying planes. We were always made
to wear a parachute even though we were told that in the event of an
emergency we wouldn't have time to open it before we hit the ground.

d.

in message <[email hidden]>, Gawnsoft

(') said:

On Mon, 26 Jul 2004 16:07:00 +0100, "Steve Almond" wrote (more or
less):
...

Quoted message said:

Very clever. Your attachment to 7 mph is touching.

Not my attachment to 7mph.

7mph is the /extreme/ outside of the performance envelope of the very
/best/ bicycle helmet.

(it does assume things like average cyclist height and not having an
unusually weighty head).

As it happens, my personal cycling takes place at between 8km/h
(uphill) and 25km/h (downhill) (although I once hit 30.1 on a fast
downhill), with lots of 14-19 on the flat.

Boggle.

My max on Saturday was 37mph or 59.5 Km/h (downhill, obviously, and
chasing a tandem); average over 114Km was 12.1mph or 19.4 Km/h. And I'm
not fast - I can't keep up with good riders. Are you sure your computer
is set right?

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/
Iraq war: it's time for regime change...
... go now, Tony, while you can still go with dignity.
[update 18 months after this .sig was written: it's still relevant]

On Wed, 28 Jul 2004 09:35:03 GMT, Simon Brooke <[email hidden]>
wrote (more or less):

Quoted message said:

in message <[email hidden]>, Gawnsoft

(') said:

On Mon, 26 Jul 2004 16:07:00 +0100, "Steve Almond" wrote (more or
less):
...

Quoted message said:

Very clever. Your attachment to 7 mph is touching.

Not my attachment to 7mph.

7mph is the /extreme/ outside of the performance envelope of the very
/best/ bicycle helmet.

(it does assume things like average cyclist height and not having an
unusually weighty head).

As it happens, my personal cycling takes place at between 8km/h
(uphill) and 25km/h (downhill) (although I once hit 30.1 on a fast
downhill), with lots of 14-19 on the flat.

Boggle.

My max on Saturday was 37mph or 59.5 Km/h (downhill, obviously, and
chasing a tandem); average over 114Km was 12.1mph or 19.4 Km/h. And I'm
not fast - I can't keep up with good riders. Are you sure your computer
is set right?

Yes - it is set right.

Even when on fast downhills, I tend not to push it hard - I'm too
aware of the potentail for someone opening the door on their parked
car.

Plus, my front tyre is still as knobbly as the day I bought it, ten
years ago.

Although today I'm getting a fairly slick Marathon Plus at the rear,
and maybe that'll also motivate me to make sure the tyre's pumped
harder, on average.
But I'm sure.

--
Cheers,
Euan
Gawnsoft: http://www.gawnsoft.co.sr
Symbian/Epoc wiki: http://html.dnsalias.net:1122
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Gawnsoft said:

On Wed, 28 Jul 2004 09:35:03 GMT, Simon Brooke <[email hidden]>
wrote (more or less):

Quoted message said:

Boggle.

My max on Saturday was 37mph or 59.5 Km/h (downhill, obviously, and
chasing a tandem); average over 114Km was 12.1mph or 19.4 Km/h. And I'm
not fast - I can't keep up with good riders. Are you sure your computer
is set right?

Even when on fast downhills, I tend not to push it hard - I'm too
aware of the potentail for someone opening the door on their parked
car.

I used to be quite pleased to pedal my way up to 25+ mph on downhills.
Then I realised I could achieve the same effect by coasting and
bending low over my handlebars. I ride a hybrid and usually run 60psi
in the tyres - and I don't ride in the door zone.

Colin McKenzie

--
The great advantage of not trusting statistics is that
it leaves you free to believe the damned lies instead!

On Wed, 28 Jul 2004 20:02:28 +0100, Colin McKenzie
<[email hidden]> wrote (more or less):

Quoted message said:

Gawnsoft said:

On Wed, 28 Jul 2004 09:35:03 GMT, Simon Brooke <[email hidden]>
wrote (more or less):

Quoted message said:

Boggle.

My max on Saturday was 37mph or 59.5 Km/h (downhill, obviously, and
chasing a tandem); average over 114Km was 12.1mph or 19.4 Km/h. And I'm
not fast - I can't keep up with good riders. Are you sure your computer
is set right?

Even when on fast downhills, I tend not to push it hard - I'm too
aware of the potentail for someone opening the door on their parked
car.

I used to be quite pleased to pedal my way up to 25+ mph on downhills.
Then I realised I could achieve the same effect by coasting and
bending low over my handlebars.

Well, I both pedal and crouch...

Quoted message said:

I ride a hybrid and usually run 60psi
in the tyres - and I don't ride in the door zone.

In many residential roads, with cars parked on both of th eroad, the
door zone reaches pretty much to the white lining.

--
Cheers,
Euan
Gawnsoft: http://www.gawnsoft.co.sr
Symbian/Epoc wiki: http://html.dnsalias.net:1122
Smalltalk links (harvested from comp.lang.smalltalk) http://html.dnsalias.net/gawnsoft/smalltalk