abandoned takeoff

English translation: could not stop (abandon/abort) the takeoff

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:abandoned takeoff
Selected answer:could not stop (abandon/abort) the takeoff
Entered by: Alexandre Reis

23:20 Oct 30, 2017
English language (monolingual) [Non-PRO]
Tech/Engineering - Engineering (general)
English term or phrase: abandoned takeoff
The instructor was faced with a possible bird strike and engine failure in a position from which neither an abandoned takeoff nor an ejection could have been accomplished safely.

https://books.google.com.br/books?id=fktpCAAAQBAJ&pg=PT176&d...
Alexandre Reis
Brazil
Local time: 10:13
could not stop (abandon/abort) the takeoff
Explanation:
as it was not safe to do so, so they had to continue (with the takeoff procedure ) I assume

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Note added at 10 mins (2017-10-30 23:31:38 GMT)
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they were probably already going too fast down the runway when they saw a birdstrike might occur

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Note added at 13 hrs (2017-10-31 12:53:00 GMT)
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This is at accident report stage so I think the mix of tenses might be confusing

In fact, the takeoff was aborted just after becoming airborne in order to avoid a flock of birds as they didn't have enough ascent to avoid them, so they tried to land again but hit the runway heavily.
However, IF they had struck the birds, engine failure would have occurred and, from that position, an aborted takeoof would not have been accomplished safely
Selected response from:

Yvonne Gallagher
Ireland
Local time: 13:13
Grading comment
4 KudoZ points were awarded for this answer



SUMMARY OF ALL EXPLANATIONS PROVIDED
4 +6could not stop (abandon/abort) the takeoff
Yvonne Gallagher
Summary of reference entries provided
Rejected takeoff
Daryo

Discussion entries: 6





  

Answers


8 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +6
could not stop (abandon/abort) the takeoff


Explanation:
as it was not safe to do so, so they had to continue (with the takeoff procedure ) I assume

--------------------------------------------------
Note added at 10 mins (2017-10-30 23:31:38 GMT)
--------------------------------------------------

they were probably already going too fast down the runway when they saw a birdstrike might occur

--------------------------------------------------
Note added at 13 hrs (2017-10-31 12:53:00 GMT)
--------------------------------------------------

This is at accident report stage so I think the mix of tenses might be confusing

In fact, the takeoff was aborted just after becoming airborne in order to avoid a flock of birds as they didn't have enough ascent to avoid them, so they tried to land again but hit the runway heavily.
However, IF they had struck the birds, engine failure would have occurred and, from that position, an aborted takeoof would not have been accomplished safely

Yvonne Gallagher
Ireland
Local time: 13:13
Native speaker of: Native in EnglishEnglish
PRO pts in category: 32

Peer comments on this answer (and responses from the answerer)
agree  airmailrpl: could not abort the takeoff
2 hrs
  -> Thanks:-)

agree  Tina Vonhof (X)
3 hrs
  -> Thanks:-)

agree  Edith Kelly
4 hrs
  -> Thanks:-)

agree  Jack Doughty
8 hrs
  -> Thanks:-)

agree  jccantrell
14 hrs
  -> Thanks:-)

agree  Ashutosh Mitra
1 day 4 hrs

neutral  Daryo: In fact in this ST they were already off the ground, but still above the runway.
7 days
  -> meaning of the phrase asked remains the same regardless.
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Reference comments


3 hrs peer agreement (net): +1
Reference: Rejected takeoff

Reference information:
Rejected takeoff

In aviation terminology, a rejected takeoff (RTO) or aborted takeoff is the situation in which it is decided to abort the takeoff of an airplane. There can be many reasons for deciding to perform a rejected takeoff, but they are usually due to suspected or actual technical failures, like an engine failure such as a compressor stall occurring during the takeoff run.

A rejected takeoff is normally performed only if the aircraft's speed is below the takeoff decision speed known as V1, which for larger multi-engine airplanes is calculated before each flight. Below the decision speed the airplane should be able to stop safely before the end of the runway. Above the decision speed, the airplane may overshoot the runway if the takeoff is aborted and therefore a rejected takeoff is normally not performed above this speed, unless there is reason to doubt the airplane's ability to fly. If a serious failure occurs or is suspected above V1 but the airplane's ability to fly is not in doubt, the takeoff is continued despite the (suspected) failure and the airplane will attempt to land again as soon as possible.

....

https://en.wikipedia.org/wiki/Rejected_takeoff

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Note added at 18 hrs (2017-10-31 17:42:07 GMT)
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Take off - distinct stages

Stages of take-off

1. Ground run. Aircraft accelerates horizontally up to rotation speed,
VR. Altitude of aircraft constant ⇒ CL, CD constant.

2. Rotation. Aircraft nose is pitched up so at end of this phase lift
exceeds the weight and hence the aircraft accelerates vertically.

3. Flare. Flight path angle is changed so that it matches climb angle
(NB: flight path angle and pitch angle are not the same. Flight path
angle is angle cg moves relative to ground)

[*** AND ALSO part of the take-off ***]

4. Initial Climb. Aircraft climbs at steady angle to screen height
(hs ∼ 15m) CL, CD constant.

https://www.le.ac.uk/eg/mct6/teaching/aero_lect8_2016.pdf

Daryo
United Kingdom
Specializes in field
Native speaker of: Native in SerbianSerbian, Native in FrenchFrench
PRO pts in category: 4

Peer comments on this reference comment (and responses from the reference poster)
agree  Herbmione Granger
5 hrs
  -> Thanks!
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