Dave Plowman (News) wrote:
In article ,
The Natural Philosopher wrote:
Surely marathon runners do better than 10 mph? But the point is of
course that extremely fit marathon runners are exhausted at the end of
a 26 mile run in a bit over 2 hours. On the other hand a very, very
average cyclist can complete the same distance in the same time
without raising a sweat. If nothing else is, that's an obvious
indication of how much more efficient bikes are than legs on a fairly
flat even course.


however you try cycling up Everest, or a cliff..

legs are general purpose transport that will do all terrain at about
3-10mph and are capable of vertical takeoff.

Bikes only do relatively smooth surfaces and low slope angles.

You make it sound like it's as easy to walk up a hill as on the level.

Then you have completely failed to understand what I wrote.


--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.