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发表于 2015-1-20 15:24:47
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本帖最后由 biller 于 2015-1-24 19:46 编辑
好像是能量损失为0的意思
找到了。。。F4最老的手册
The equations for turn rate and turn radius illustrate why this is the case. Why is not as important
as knowing that there is an optimum airspeed for turning the jet. This airspeed is called corner
velocity, and it is 330-440 knots in the F-16.
There is one other maneuvering concept that I will address before we blast off. This concept is
called Specific Energy or PS
(pronounced “P" sub "s"). PS is a concept that describes the energy or
potential maneuverability of a fighter. Falcon 4.0 was developed using the PS
curves of the F-16.
These curves describe how well the F-16 will maneuver in terms of turn rate, turn radius and G.
The PS chart shows a series of fluid lines that represent specific energy states of the F-16 at an
altitude of 15,000 feet and a drag index of zero. The drag index is determined by what is loaded
externally on the jet. The zero PS line is the area of the chart where the jet can maintain airspeed
and altitude for a specific G load. The PS lines that have negative values represent a flight regime
in which the jet will lose either airspeed or altitude. The PS lines with positive numbers represent
where the aircraft has the potential to gain altitude or airspeed.
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