What's a "Negative Gun Jink"?
Kirk Darling
In pre-mission briefs to fighter pilots prior to DACT exercises, they were
always admonished, "No negative gun jinks." I get the impression these
were something like a FLANKER cobra maneuver. But what are they, exactly?
Ed Rasimus
"Kirk Darling" <kdar...@ix.netcom.com> wrote:
You missed just one letter in the admonishment--"G".
Jinking to escape a gun attack takes place near minimum gun ranges and
ALWAYS below corner velocity. Since aerial gunnery requires lead
pursuit, the idea is to quickly and randomly change the flight vector
to destroy the lead pursuit solution.
Effective jinking usually will involve a quick roll to a new plane of
flight followed by maximum full aft stick to move the nows, and force
a loss of separation by the attacker (incrementally leading to an
eventual flight path overshoot.)
By the time someone is forced into gun defense jinking they are in a
"last ditch" situation so the loss of energy is secondary to the
immediate objective of destroying the attacker's gun solution.
Negative G gun jinks would involve sudden "unloading" of the aircraft,
and although not usually as effective as rolls and positive G jinks,
the maneuver can work. The danger in training is principally that with
"lead" for guns the attacker could lose sight with a negative G jink
forcing the defender below the attacker's nose suddenly. With
reasonable attack closure it leads to a situation where the attacker
is "blind" with no place to go safely.
There is an additional minor concern of negative G "over-G" but the
real danger is loss of sight by a closing attacker and collision.
Ed Rasimus *** Peak Computing Magazine
Fighter Pilot (ret) *** (http://peak-computing.com)
*** Ziff-Davis Interactive
*** (http://www.zdnet.com)
Marcus Planer
IT is interesting as well that within the european theater, negative guns
jinks are not prohibited at all and with aircraft like the F-4F work very
well against newer generation aircraft...
Ed Rasimus schrieb in Nachricht <354347d2...@news.rmi.net>...
Kirk Darling
While waiting for Ed's answer, I happened across a local naval fighter
pilot and asked him the same question. He gave the negative physical
effects of a negative-G gun jink more emphasis and described it as
something you do when the only other option is dying. So one would rule it
out as an exercise to practice in training. At least it appears to be
something the people responsible for doing all the paperwork would admonish
the pilots not to do.
Marcus Planer <ru...@wazoo.com> wrote in article
<6i3gvc$r...@hume.nmia.com>...
wal...@oneimage.com
In article <354347d2...@news.rmi.net>,
Added: Ed sums it up nicely. The 'last ditch'maneuver is a manuever to
stay alive when the bad guy is shooting at you close in. The recommended
maneuver when I went through F86s was full forward and ful left or right
stick. As Ed says, you're below corner velocity even for negative g limits
usually -3, and the airplane will probably depart (tumble) and may go into an
inverted spin. When you've recovered from that you're generally around
150 IAS and have to dive for speed. If no one is around to distract the bad
guy he's probably circling above you and seconds away from another gun
solution. Not good. That's why when one found oneself alone in bad country
the school answer was to go home - fast. Walt BJ, ftr plt @ large
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Jeff Crowell
Marcus Planer wrote:
> IT is interesting as well that within the european theater, negative
> guns jinks are not prohibited at all and with aircraft like the F-4F
> work very well against newer generation aircraft...
The maneuver is prohibited as a "safety of flight" issue during
training. That sure doesn't mean it wouldn't be used in actual
combat if things came to the crunch.
Jeff
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