On Mon, 19 Apr 2010 10:47:50 +0100, Rob Horton wrote:

John wrote:
js.b1 wrote:
Air France, 2 German Airlines, Dutch Airline and BA achieved
successful test flights.

An issue is the density of ash - below a certain level it may be
immaterial.

I suspect the real issue is the move to 2 turbines from 4... #1 -
reliability calculations for 2 turbines in place of 4 do not include
ash
#2 - high altitude may be critical for efficiency with 2 large high
bypass turbines

The 767 has a very high rate of climb to get to cruise altitude as
quickly as possible. Burning fuel at low altitude may not put it in
the drink, but may well require surcharges.

The successful test flights did not say at what altitude they were
performed.

Who are you replying to? Because you've chopped ALL previous content
your posting makes no sense. By all means cut out excess text but
please keep the context of the messages.


It's the comment from Bruce. I use Thunderbird which uses a tree view to
display messages so that you can intuitively and instantly see and
understand how all of the messages relate. A consequence of this is that
having a load of previous text at the top of a posting becomes annoying.
Click on message, scroll down past previous stuff, click on next
message and scroll down previous stuff, etc. Be much better if everyone
top posted instead. No, I am not trying to troll or be antagonistic,
it's just my personal experience.

But, of course, you have to keep the old messages indefinitely to ensure
you have context for later posts.

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