Jet Blast

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Jet Blast
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Jet Blast Characteristics
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Jet Engine Exhaust Velocity Contours, Takeoff
Power
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Test Program
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Kennedy International Airport - 1999 Aerial View
Aerial photo of JFK
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Kennedy International Airport - 1999
Purpose
Under one of Kennedy International Airports
(JFK) arrival/departure runway configurations, a
Heavy departure on RWY 31L is delayed if there is
a large or small aircraft due to arrive on RWY 4R
within 2 minutes The intent is to measure jet
blast duration, generated primarily by Heavy
aircraft, to determine whether the 2-minute delay
may be safely reduced
31L
760 Feet
4R
700 Feet
Jet Blast Delay Region
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Kennedy International Airport - 1999
Site Description

This test site is located 760 ft from the end of
RWY 13R The primary jet blast sensor is an
Anemometer Windline that comprises seven 50-ft
fiberglass poles, spaced 55 ft apart,
and deployed in a line centered on and
perpendicular to the extended RWY 13R Each pole
is equipped with eight head-wind anemometers
spaced 5 ft apart starting at a height of 10
ft The jet blast generated by departing aircraft
drives the anemometers with a speed dictated by
the portion of the jet blast encountered The site
is configured to operate unattended, but is
monitored from the Volpe Center with a video link
allowing capture of a high resolution still
video picture of each generating aircraft



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Kennedy International Airport - 1999 Jet Blast
Test Site