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Old 19th June 2007 | 17:28
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Chuffer Chadley
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Joined: May 2002
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From: A long way from here.
Wet V1

Hello!

Thanks again to all contributors to my Performance in Clouds thread.

Here's another question that's doing the rounds with me and my mates.

On p190 of 'Ace the Pilot Technical Interview' (which, as has already been established, contains quite a few errors), there is a passage on 'Wet V1', pertaining to Jet transports. Being a turbo driver, this isn't my area of expertise.
The book states that 'Wet V1', a lower speed (by 10kt) than 'Dry V1', is the last moment that a t/o can be aborted on a wet rwy. Makes sense so far.

However, the book goes on to say that the 'Wet V1 is not a V1 speed because it does not imply any ability to continue the takeoff in the event of an engine failure... and may be less [than] Vmcg. Therefore, a takeoff from a wet runway may result in a risk period between [Wet V1] and normal V1.'.

This does not make sense to me- is this right? Is there really 10kt speed range in which an engine failure results in calamity in a jet?

Thanks in advance for your responses.

CC
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