On Sat, 6 Nov 2004 at 22:00:32 in message
, Stealth Pilot
wrote:

So at a TAS of 110k you travel a ground distance of 100nm against a wind
of 10k and surprise, surprise you than fly 110 'air' nm

More or less self evident so I am unclear what that achieves?

You're wrong, here's why:

you're still wrong and that is why you're not achieving anything.
in the real world your cruise speed remains constant so what happens
is that the 110 nautical miles that the wind makes the 100 miles seem
like, takes longer to fly. engine running for longer equals more fuel
burn from the fixed tankage in the aircraft hence the need to pre calc
the usage and plan for it.


No one disputes that statement of the obvious I would guess. Anyway as
far as I know you slightly adjust your cruise speed according to the
situation. That wasn't what anyone was discussing as far as I can see.
Perhaps you could tell me what I was trying to achieve as you seem to
know better than I do? On second thoughts don't bother.

if you are actually a pilot you are an accident waiting to happen.
Stealth Pilot

I'm not, just an elderly aeronautical engineer, so that's all right
then!
--
David CL Francis