Big screw up at Bruntingthorpe Aerodrome on Sunday - Page 2

Darrin · 07-05-2009, 01:35

V1 is launch velocity. Where a plane is GOING to fly unless you either slow it down or forcefully keep it on the runway.

You know, that speed that your buzz bomb powered skate board hits?

Feek · 07-05-2009, 19:23

Quote:

Originally Posted by Flibster

3) She got reasonably close to V1

Quote:

Originally Posted by Jonny69

I understood everything except for this one, what does that mean?

Effectively it's the point of no return. Once you reach that speed then you are going to fly! You may not actually don't have the runway in front of you to be able to stop! On commercial airliners once that speed is reached the pilots take their hands off the throttles so they won't instinctively retard them.

The calls (again on commercial aircraft) go:
Take off thrust set
80 knots
V1 (point of no return)
Rotate (hands pull back on the yoke)
V2 (effective speed for climb out)
Positive rate, gear up

...and so on.

V1, Rotate (Vr) and V2 and generally pretty close together.

Back to the incident, I'm quite surprised the aircraft is taken close to V1 but I suppose that if the nose is going to be lifted then it's essential but as can be seen here, all it takes is a gust at the wrong (right!!) time for the aircraft to get into the air.

I'm betting this 'fast taxi'

won't be allowed any more if there are any winds whatsoever.

Impressive though

Flibster · 08-05-2009, 17:19

The current rumour on the cause...

"the victor was being commanded by an ex pilot of that type but the throttle man was just a helper under instruction from the pilot when instructed to shut down the throttles he only reduced it a bit the pilot then told him all the way at witch point he panicked and went to full power instead the rest is history."

Oh, and to give you an idea of how overworked these aircraft were.
There is something on all aircraft called a Fatigue Index (FI). This goes from 0 to 100. 0 for new - 100 for end of life. Simple.

Before the first Gulf Argument they Victor tanker fleet were given an extension so they could provide the necessary tanker cover. The surviving airframes sit at the wrong side of FI 135

Ouch.

07-05-2009, 01:35	#11
Darrin Dirteh Kitteh Join Date: Jan 2007 Location: Hiding out in Mormon Country Posts: 1,629	V1 is launch velocity. Where a plane is GOING to fly unless you either slow it down or forcefully keep it on the runway. You know, that speed that your buzz bomb powered skate board hits? __________________ A bullet may have your name on it, but shrapnel is addressed "to whom it may concern".

08-05-2009, 17:19	#13
Flibster Moonshine Join Date: Jul 2006 Posts: 3,388	The current rumour on the cause... "the victor was being commanded by an ex pilot of that type but the throttle man was just a helper under instruction from the pilot when instructed to shut down the throttles he only reduced it a bit the pilot then told him all the way at witch point he panicked and went to full power instead the rest is history." Oh, and to give you an idea of how overworked these aircraft were. There is something on all aircraft called a Fatigue Index (FI). This goes from 0 to 100. 0 for new - 100 for end of life. Simple. Before the first Gulf Argument they Victor tanker fleet were given an extension so they could provide the necessary tanker cover. The surviving airframes sit at the wrong side of FI 135 Ouch. __________________ Last edited by Flibster; 08-05-2009 at 17:40.

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