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Sunday 14 October 2012

Cool instructor

Basically this is a continuation from the last post,
which I said I had a very awesome instructor.
Today, he told us another story which was
he had experienced more than 10g once 
when he was flying the fighter jet with his officer 
in a combat-practicing sortie many years ago!

For those who don't know what "g" is,
I have to tell you that it's the load factor
which is the ratio of Lift to Weight of an aircraft.
Let's say if you are experiencing 10g,
your weight is actually 10 times heavier than the original,
so that you cannot move any part of your body at that time,
all your blood will flow down and accumulate at your legs,
causing you to have a black-out and unconsciousness.

Talking back about 10g, it's actually almost the limit of the aircraft.
The Limit Load Factor(the maximum load to be expected in normal service) 
for a fighter jet is 9g, multiplying by 1.5 which is the safety factor,
the Ultimate Load Factor(failing load of a structure) 
which a fighter jet can maintain is 13.5g.
What I'm saying is that the aircraft cannot fly more than 13.5g,
otherwise the aircraft structure might fail and break off, however,
even though you haven't exceeded the ULF, below LLF, 
the aircraft structure might also have permanent deformation.
This happened to my instructor! The wings of the aircraft rippled
because of the very high load factor experienced, anyway,
my instructor managed to bring it back to the base and landed safely.

Isn't he cool?




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