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|  MILl-A-19736A(Wep)
3.9 Air refuling hose: Unless otherwise specified the hose shall conform to Specification MIL-H-4495,
Type I. Hose fittings shall be readily replaceable by use of simple hand tools, Fittings shall not
cut or damage the hose in service. An external spring shall be provided at the trailing end of the
hose to prevent local bending or kinking. The hose assembly shall withstand 500 cycles of hose reel
operation without requiring replacement.
3.12 Reception Coupling: The reception coupling snall conform to Specification MIL-C-25162. The
tanker shall be suitable for use of any qualified brand of reception coupling. No modification shall
be required to any part of the reception coupling to accommodate it to the installation.
3.13 Drogue: The drogue shall be approved by the Bureau of Naval Weapons.
3.14 Control panels: Panels shall be in accordance with Specification MIL-C- 18012. Controls and
indicators shall be provided as necessary for all functions and shall include the following:
Reel trail and rewind control
Fuel valve control
Fuel pump control
Emergency trail control
Guillotine switch with guard
Light dimming switch
Fuel meter indicator
Signal lights:
Drogue stowed with reel locked: White
Drogue at full trail ready for engagement: Yellow
Low hydraulic pressure: Red
Fuel flowing: Green
Controls for emergency functions shall be grouped together in an area of the panel separate from the
other switchest.
3.15 Receiver aircraft probes.
3.15.1 Location: The design objective is to locate the probe so that its tip or nozzle is comfortably
within the receiver pilot's direct vision as he views the tanker aircraft and the extended drogue
during closure to engagement. The nozzle shall be visible to the receiver pilot through the windshielci
The nozzle shall be located as high and far forward as practicable and near the longitudinal centerline
of the aircraft. kind tunnel investigation shall be made to determine a probe location such that
stability of the drogue is not adversely affected by the air flow field around the receiver aircraft
during closure to engagement. The probe installation shall not adversely affect airflow distribution
of the engine air induction system or other air scoop inlets.
3.15.2 Installation: Probes may be fixed or retractable. Fixed probes shall not interfere with the
pilot's vision of carrier landing systems. Fixed probe installations shall be compatible with handling
of the aircraft on elevators and decks of aircraft carrier. The shape of all probes shall be suitable
for engaging the reception coupling with all sizes of collapsible drogues which have an outside
diameter not greater than 34 inches, target diameter not less than 22 inches and length not greater
than 20 inches. There shall. be no physical interferered between the probe and the drogue nor the
drogue and the receiver aircraft. Probe fairings, doors and actuating mechanisms shall be made so
that the drogue cannot hang up thereon.
3.15.3 Strength: Probe strength shall be in accordance with Specification MIL-A-8865. Retractable
probes shall be capable of extension and retraction at calibrated airspeeds up to 400 knots.
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