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Re: Another Airbus down ....

<nntp@benison.co.uk> wrote in message
news:bpcn45prip5028ivgchis46u5his9ceuis@4ax.com...
> On Wed, 01 Jul 2009 19:16:59 +0100, Brian Morrison
> <scrapspam@fenrir.org.uk>
> wrote:
>
>>But no one knows now or will ever know. The only four people who might
>>have known all died in the cockpit.
>
> Correct and well said.
>
> And for the other Brian.  Yeti has the sentiment right.  When a pilot
> calls V1
> they are  saying they have reached a velocity that the aircraft will reach
> V2
> even if with a critical engine failure and we are going to rotate.  V1 and
> V2
> are extremely close in many types because of this.  I am no longer
> qualified
> multi-engine and was never qualified on the Trident but the fundamental of
> this are based in physics and do not change over time!

The physics says, if you don't have power, you won't keep accelerating.  The
understanding of that bit of physics dates back to Isaac Newton and, last
time I checked, it hasn't changed.

In a multi, the idea is that (even with a critical engine failure) you will
still have enough power to keep accelerating to V2. If you are in single, or
the remaining power in a multi isn't enough, you don't get to V2. No V2 and
not enough runway and you "have a problem".

I agree that, if V1 and V2 are the same, you should be OK.

If you read my first and later comments, you will see I picked up on:

"That's what V1 is for, any problem at or above that speed and you take the
problem into the air."  and the comment re V2.

V1 is no guarantee of reaching V2, even in a multi with a problem. True,
multis are designed to cope with A critical engine failure but if the
problem is more extensive, are you saying you can still reach V2? If you
know the physics to achieve that, the world is waiting.

Reminds me of the great "motion without power" debate, eh Spike?

--
73
Brian G8OSN/W8OSN
www.g8osn.org.uk

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