15 December 1965
ITEM NAME: LANDING CONTROL CENTRAL
General Operating Characteristics
and runway approach course horizontal; elevation
up- down scale expanded approx 10 times, with vertex
and ground line horizontal. Logarithmic range
Power Output: 45 kw (peak)
scales provide increasing sensitivity with decreasing
Range (determined with T-33 type aircraft):
At least 8 naut mi
Electronic Cursors: Separate cursors to
indicate azimuth courseline, elevation glidepath,
Azimuth: 20 deg
and glidepath downward deviation limit.
Elevation: 7 deg
Maps: Separate illuminated maps indicate limits of scan
and intervening degree marks for both azimuth and
Azimuth: 0.6 pct of target range plus 10 pct of
deviation from optimum approach path.
Elevation: 0.3 pct of target range plus 10 pct of
deviation from glidepath.
Range: 2 pct when target range is more
Operating: Interior, -22 deg to plus
than 5 pct of indicator range setting.
140 deg F (-30 deg to plus 60 deg C)
Nonoperating: Exterior, -40 deg to
Azimuth: 1.1 deg target spearation
plus 140 deg F (-40 deg to plus 60 deg C)
Elevation: 0.6 deg target separation
Relative Humidity: 100 pct max under
Range: 200 ft separation
plus 90 deg F (plus 32 deg C)
Detectable deviation from glidepath:
Barometric Pressure (operating): Sea
25 ft at one-mi range
level to 6000 ft
PRF: 1833 pps plus or minus 3 pct
Salt Atmosphere: As encountered in
Amplitude (terminated in 100 ohms): 35v
Sand and Dust: As encountered in
min for at least 0.5 usec at 50 pct of
Rain: As encountered in tropical
Rise Time: 400v per usec min
Indicator Characteristics (Precision Radar):
Siting: The mobile RAPCON may be located up to a
Type: Azimuth (lower half) and eleva-
distance of 500 feet from the GCA repair set.
tion (upper half) expanded displays
The mobile RAPCON must never be located
combined on 12 in. CRT with sector
within the scan area of the precision antennas of
limiting to prevent overlap.
the radar set. The AN/MPN-14 equipment must
Information: Normal and MTI video,
be located a minimum distance of 500 feet from
range marks, cursors, and servo data.
the centerline of any runway, 250 feet from the
Sweeps: Logarithmic timebase sweeps 8-5/16
far edge of any taxiway (350 feet for heavy
in. long. At 1 mi, sensitivity is 3
bomber bases) and 125 feet from the far edge
times that of linear sweep at one mi
of any apron. These distances are measured to
the end of the AN/IPN-14 equipment nearest the
Range Marks: Adjustable for any range
runway, taxiway or apron.
between 6 and 10 naut mi
Cabling Requirements: The mobile RAPCON
equipment is capable of remote operation up to
with variable delay between O and 55
a distance of 500 feet, although only 250 feet of
used (O to 4.5 mi) with respect to
cable is supplied.
the timebase sweep origin.
Off-Centering: Azimuth scale expanded
approx 3 times, with vertex at left
15 December 1965