• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
SEQUENCER MODES
Ejection sequence - 14019_105

Aviation Structural Mechanic E1&C - How airplanes are built and how to maintain them
Page Navigation
  86    87    88    89    90  91  92    93    94    95    96  
Table 5-2.-Sequencer Timings Altitude (ft) 0 – 8 K 8K—18K 18K+ KEAS 0—350 350—500 500-600 ALL ALL MODE 1 2 3 4 5 1 2 3 4 5 6 7 8 Gas pressure from seat initiator cartridges, delay cartridge or command sequencing system initiates catapult and thermal batteries Start switches close after 39 inches of seat travel Sequencer supplies dual pulse to fire drogue deployment catapult Sequencer supplies dual pulse to fire drogue bridle release cartridge and release drogue bridle Sequencer supplies dual pulse to fire parachute deployment rocket Sequencer supplies dual pulse to fire drogue bridle release cartridge and release drogue bridle Sequencer supplies dual pulse to fire barostatic release unit cartridge and release harness locks Sequencer supplies dual pulse to fire barostatic release unit cartridge backup) 0.00 0.18 0.22 0.32 0.45 — 0.65 0.66 0.00 0.18 0.22 — 1.10 1.25 1.30 1.31 0.00 0.18 0.22 — 1.30 1.45 1.50 1.51 0.00 0.18 0.22 — 2.90 3.05 3.10 3.11 0.00 0.18 0.22 4.80 +t (See Note 3) 4.87 +t 5.07 +t 5.08 +t NOTES TO TABLE 5-2 1. All times are referenced to seat catapult initiation. To obtain times referenced to sequencer start switches, subtract 0.18 sec. 2. Mode selection environmental sensing takes place between 0.245 sec and 0.305 sec (8 microprocessor cycles). 3. In Mode 5 operation, altitude sensing recommences at 4.80 see, continuing until the seat falls to 18000 ft. ´t´ = time interval between 4.80 sec and falling to 18000 ft. 4. Mode decision parameter values are stored in the on-board NOVRAM. 5-36







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.