Originally Posted by
freshgasflow
Grateful if someone here can explain to me (SLF) how can a engine surge happen during a take of roll ? After all, isn't there enough forward motion to ensure enough airflow into the engine intake ? Thank you.
As take off roll (usually) starts from being on stop, initially there is no ram air except for any headwind. The ground roll, especially at low speed, is one of the most likely times for such a surge. In this case, it seems this is very much the case, from one of the earliest posts from an eye witness:
Looked like the aircraft moved a few feet before aborting, no real speed had built up at all.
So it is unclear what exactly is your point, which is worded to appear as a rhetorical question.
In this particular incident, the same witness also reported seeing:
Huge yellow flame from the port side engine, lasted about 4 seconds, and then a large burst of white sparks, similar to when you see welding taking place, but they 'spat out' rather then fell out the back of the engine.
This indicates it is highly likely to have been a mechanical disintegration from within the engine, in which case any discussion about natural surges caused simply by insufficient airflow appear to be completely irrelevant.