Go Back  PPRuNe Forums > Ground & Other Ops Forums > ATC Issues
Reload this Page >

definition of a take off

Wikiposts
Search
ATC Issues A place where pilots may enter the 'lions den' that is Air Traffic Control in complete safety and find out the answers to all those obscure topics which you always wanted to know the answer to but were afraid to ask.

definition of a take off

Thread Tools
 
Search this Thread
 
Old 14th Apr 2005, 14:22
  #1 (permalink)  
Thread Starter
 
Join Date: Apr 2005
Location: malaysia
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
definition of a take off

need some help guys....what is the definition of a take off? where can i find the black and white of it? an aircraft has lined up but has not commenced its roll...due to technical it requests to taxy off the runway...does this consitute a rejected take off?
dancia is offline  
Old 14th Apr 2005, 18:22
  #2 (permalink)  
 
Join Date: Feb 2001
Location: Hants, UK
Posts: 1,064
Likes: 0
Received 0 Likes on 0 Posts
Don't know where it is written, but my understanding would be as follows:

A take-off does not commence until take-off power has begun to be applied with the intention of getting airborne. A rejected take-off can occur from that point until airborne. It does not necesarily have to be a screaming stop. In some cases the take-off may be rejected very early (such as a configuration discrepancy warning which activates as soon as the throttles pass a certain setting) or very late (when the hedge at the end of the farm strip suddenly looms very large and you don't look like getting over it!)

The situation you describe would not consititute a rejected take-off.
eyeinthesky is offline  
Old 14th Apr 2005, 22:58
  #3 (permalink)  
 
Join Date: Jun 2002
Location: UAE
Posts: 670
Likes: 0
Received 0 Likes on 0 Posts
Dancia, the situation you discribe is known locally as a Dash 8 Q400 !!
Tower Ranger is offline  
Old 15th Apr 2005, 10:05
  #4 (permalink)  
 
Join Date: Nov 2000
Location: Scotland
Posts: 124
Received 0 Likes on 0 Posts
Dancia,

Your situation isn't a rejected take-off. However, depending on the type of technical problem (e.g. engine failure), a runway inspection should be carried out.

Regards

letMfly
letMfly is offline  
Old 15th Apr 2005, 17:07
  #5 (permalink)  
 
Join Date: Sep 2001
Location: South East
Age: 56
Posts: 614
Likes: 0
Received 0 Likes on 0 Posts
I am not sure which angle you are coming from. Do you want to know for some sort of pilots/tech log, or just curious?
I would have thought that a take off would be from the moment take off power is applied. But a rejected take off could be from the time a pilot has completed his pre-take off checks and reported ready for departure, then reports tech.
As you can see, I am about as useful as a do-nut.
Barnaby the Bear is offline  
Old 17th Apr 2005, 18:31
  #6 (permalink)  
 
Join Date: Nov 2003
Location: UK
Posts: 196
Likes: 0
Received 0 Likes on 0 Posts
a little off subject but some may remember that interestingly according to the word of the law an aircraft is deemed 'in flight' when:

in the case of a piloted flying machine, from the moment when after the embarkation of the it's crew for the purpose of taking off it first moves under it's own power,

until the moment when it next comes to rest after landing.

ie from first taxi after push until pulling onto stand. what's that all about...?
hangten is offline  
Old 17th Apr 2005, 21:19
  #7 (permalink)  
 
Join Date: Nov 2004
Location: Poland
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
I believe it's about insurance.
Frunobulax is offline  
Old 18th Apr 2005, 10:19
  #8 (permalink)  
 
Join Date: Feb 2002
Location: By the Sea-side
Posts: 282
Likes: 0
Received 0 Likes on 0 Posts
Positive rate of climb on two instruments. Anything else is just fast taxying.
Dances with Boffins is offline  
Old 21st Apr 2005, 12:54
  #9 (permalink)  
 
Join Date: Sep 2000
Location: On top of the world
Posts: 47
Likes: 0
Received 0 Likes on 0 Posts
An aircraft is deemed airborne when the nose wheel lifts off, thats the time for ATC to commence vortex wake timing (unlike pilots who deem vortex timimg to commence the moment the aircraft starts rolling- but thats another debate!)

An aircraft is deemed to have commenced fa flight at the time the wheels start moving off the ramp, whether that be starting pushback or taxi straight off

An aircraft would be deemed to have abandoned take off at any point after the clearance for take off has been issued. If the pilot wishes to vacate a runway before that clearancwe is issued, its not considered to have abandoned take off. However, if the reason for non departure is likely to have contaminated the runway then a runway inspection will be requested

Does that help?

see the ANO for the legal wording/advice
hooplaa is offline  
Old 22nd Apr 2005, 02:10
  #10 (permalink)  
 
Join Date: Jul 2001
Location: Fort Worth ARTCC ZFW
Posts: 1,155
Likes: 0
Received 0 Likes on 0 Posts
Cool

In the US there is debate going on right now about the meaning of airborne... Some say that it is when the nose wheel comes up and some say it's when all the wheels come up. We are waiting to see what Flight Standards comes up with...

regards

Scott
Scott Voigt is offline  
Old 22nd Apr 2005, 13:40
  #11 (permalink)  
 
Join Date: Feb 2003
Location: Oxford
Posts: 2,042
Likes: 0
Received 0 Likes on 0 Posts
Hangten - it's also about pilots logging flight time ('brakes off to brakes on').

Tim
tmmorris is offline  
Old 22nd Apr 2005, 14:43
  #12 (permalink)  
 
Join Date: Feb 2005
Location: FRANCE
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
the TO distance is from brake off to 50ft after lift off.
for a rolling TO it begins at the TO power initialisation.
aerojul is offline  
Old 22nd Apr 2005, 17:46
  #13 (permalink)  
 
Join Date: Aug 2002
Location: By here now in a minute
Posts: 122
Likes: 0
Received 0 Likes on 0 Posts
An aircraft is deemed to have commenced fa flight at the time the wheels start moving off the ramp, whether that be starting pushback or taxi straight off
Not pushback. Aircraft is deemed to be in flight... "when it first moves under its own power for the purpose of taking off until the moment when it next comes to rest after landing". And I remembered that!

(The only other thing I remember from the last few weeks is the one about not being able to drop animals from an aircraft "whether or not attahced to a parachute"!)
I'm not joking sir is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.