Stopped for speeding?

[Dylan Smith]

On 2007-04-14, Alan Holmes <[email protected]> wrote:
> Professional cyclists use light weight bikes wich do not perform as well as
> heavier bikes.

Good grief, that's like saying Formula 1 drivers use light cars that
don't perform as well as my Range Rover!

--
Yes, the Reply-To email address is valid.
Oolite-Linux: an Elite tribute: http://oolite-linux.berlios.de

 

[Coyoteboy]

Ziggy proclaimed to uk.rec.cycling ...

> It reminds me of how, many years ago, some of the people I worked with
> would have tales about how they got x+20 mph out of their car on the flat
> when the manufacturer's stated top speed was x mph.

Depends on the car, my current car maxes at 149 and clocks max at 180mph
according to the manufacturer, ive never even tried to reach it but I have
had it at 135 *with ease* - though its rev-limited so it would never go
past whatever speed that is unless the hill was very very steep

However my old peugeot 205 1.1 litre (4 speed, 44hp) was quoted as having a
top speed of 85mph by Peugeot, clocks ended at 110mph, it had no rev
limiter and was several times pushed past the 105mph mark on a downward
sloping section of track. Now assuming the ~10% error and it was actually
getting closer to 95mph (it held 70 (with a GPS) at an indicated 74, I
never tested it at high speeds with the GPS).

Either way you should never trust manufacturers values - TVR are well known
for quoting 350bhp models and having closer to 250bhp when actually tested.
It works both ways.

J

 

[Coyoteboy]

Alan Holmes proclaimed to uk.rec.cycling ...
> At the time I was talking about there were no different tyre sizes!
>
> They were sold for specific wheel sizes.
>
> Alan

A friend and I recently realised that, though we use the same size wheel and
tyre combo, and calibrated our computers the same, I was getting 1mph
faster average than he over the same course, despite starting and arriving
together. Figured out that my tyres flex more than his and mine were
effectively smaller diameter when loaded. We double checked with my
bar-mounted GPS and his was correct and mine was reading ~0.75-1mph slower
than the GPS and his. I did run some calcs afterwards and I'm fairly sure
it worked out that the flex would have to be fairly large (which it isnt)
so clearly the accuracy of the computers is also in question, just
compounded by the tyre flex.

 

[Dave Larrington]

In news:[email protected],
Coyoteboy <[email protected]> tweaked the Babbage-Engine to tell us:

> A friend and I recently realised that, though we use the same size
> wheel and tyre combo, and calibrated our computers the same, I was
> getting 1mph faster average than he over the same course, despite
> starting and arriving together. Figured out that my tyres flex more
> than his and mine were effectively smaller diameter when loaded. We
> double checked with my bar-mounted GPS and his was correct and mine
> was reading ~0.75-1mph slower than the GPS and his. I did run some
> calcs afterwards and I'm fairly sure it worked out that the flex
> would have to be fairly large (which it isnt) so clearly the accuracy
> of the computers is also in question, just compounded by the tyre
> flex.

Also I think the clocks in cycle-computers are not as accurate as the
manufacturers might have us believe.

--
Dave Larrington
<http://www.legslarry.beerdrinkers.co.uk>
I am Wan, for I am pursued by the Army of Plums.

 

[Alan Braggins]

In article <[email protected]>, Alan Holmes wrote:
>"Alan Braggins" <[email protected]> wrote in message
>> In article <[email protected]>, Alan Holmes wrote:
>>>
>>>You cannot say that in this group, I was called a liar for saying I had
>>>averaged 29.5 over 84 miles!
>>
>> It was gently suggested that you might be mistaken, rather than anyone
>> assuming you were deliberately deceitful, at least in the threads I've
>> seen. You have repeated shown that your observation skills and/or memory
>> are problematic at times.
>
>And, whether you like it or not, when you grow up you will find that at
>times you will forget things!

No doubt. But I trust that when someone points out that my memory of
something is physically implausible, I will consider that my memory might
be wrong rather than objecting to being called a liar.

For example, I distinctly remember being able to fly when I was a small
child. But I accept that no, that didn't really happen, I dreamt it.