Fuel System

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Fuel System
This is the best composite example I could create
to truly demonstrate how the external system is
supposed to look, it is not the system printed in
NATOPS. This will help you visualize it works.
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Fuel System
NATOPS Image
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Fuel System

• Description
• Main Tank System - 2 interconnected self sealing
  crashworthy cells, suction type fuel flow
  (reduces fuel spray if a line were to break)
• Each Tank has a Capacitance type quantity sensing
  probe and Low level sensor (lt300 Lbs) Caution
  Light!
• Left cell contains two high level shutoff floats
  with pre-check valves
• Right cell feeds APU
• Two ext tanks crashworthy ballistically
  hardened tanks, with self sealing breakaway
  valves, single gauge quantity probe, thermister
  to signal empty, controlled via FMCP
• Three methods of refuel
• Pressure refueling 55psi max
• Gravity refueling only when rotors are not
  spinning and engines are off (rarely used)
• Helicopter In-Flight Refuel (HIFR) Can be used
  when fuel is suspected to be contaminated.
  Contains Go-NoGo Canister - the only filter that
  will filter water, oil and other particles (PSI
  differential shutoff valve approx. 20psi)
• During refuel with power, ext tank shutoff
  valves close until main tank is full then fill
  one at a time. Without power all tanks fill
  randomly
• Capacity
• Main Tank 590 Gallons (JP-5 4012 lbs, JP-8
  3953 lbs)
• External Tanks 2 _at_ 120 lbs each
• Fuel Dump
• Controlled via FMCP
• Both dump valves and pumps activate and drains
  fuel out of the right cell at approx. 800lbs/min
  until low level sensor activates