Ejection Seat Flashcards
List the Ejection Seat checks
- Seat firing handle - pin in
- Leg restraint lines - condition and secure
- PSP deployment - A/R (MAN/AUTO)
- MOR handle - not pulled
- CFS striker plate - not obstructed
- Top latch (left and right) - secure and tell tales flushed(yellow witness marker not visible)
- EO2 - not pulled, contents in green
- Main oxygen supply hose - connected
- Oxygen hose - correctly connected and free to rotate
- Man/seat portion disconnect lanyard - connect to harness and pipe fittings
- Back rest - adjust A/R (set aft)
- Harness - condition, all attachments secure
- PSP connectors - secure
- PSP kit release handle - not pulled
- ISS (rear cockpit only) - A/R
Weight restrictions of ejection seat
123lbs (55.8kg) to 265lbs (120.2kg)
Primary ejection area
Muchea Range(R179)
340° magnetic heading
5000ft AGL
Recommended speed for ejection
150kts to 250kts
ISS settings and sequence
INDEPENDENT
Front - The front seat is ejected immediately, the rear seat is not ejected
Rear - The rear seat is ejected after a 0.17 second interval, the front seat is not ejected
REAR
Front - The front seat is ejected after a 0.54 second interval, the rear seat is not ejected
Rear - The rear seat is ejected after a 0.17 second interval, the front seat after a 0.54 second interval
BOTH
Front - The rear seat is ejected after a 0.17 second interval, the front seat after a 0.54 second interval
Rear - The rear seat is ejected after a 0.17 second interval, the front seat after 0.54 second interval
Location of the following handles
- EO2 handle
- MOR handle
- Seat firing handle
- PSP kit release handle
- EO2 handle - LEFT
- MOR handle - RIGHT
- Seat firing handle - CENTER
- PSP kit release handle - LEFT
How long will the EO2 typically last?
Typically less than 5 min
Limitations of ejection seat raise/lower switch
Should not be operated for more than 5 min after it has been operated for 1 min
List ejection seat drill
- Warn other occupants
- Aircraft position - suitable area
- Height - ideally 2000ft AGL
- Airspeed - 150kts to 250kts
- Attitude - wings level, climbing
- Radio - Mayday call
- Throttle - idle, friction tight
- Trim - 1/3 aileron trim
Steps to be carried out by all occupants
- Seat harness - tight and locked, PSP connected
- Visor - Down and locked
- Feet - On rudder pedals
- Seat firing pin - confirm removed
- Sit straight, head back, eyes closed
- Firing handle - pull
BTRU delay separation profiles
Above 4694 m (15400 ft):
The main barostat capsules prevent the operation of the BTRU above 4694 m (15400 ft). When the aircrew have descended in the seat, stabilized by the drogue to an altitude of 4694 m (15400 ft), the BTRU will operate.
Below 4694 m (15400 ft) but above 3353 m (11000 ft):
The barostat controlled g-switch prevents the operation of the BTRU between 4694 m (15400 ft) and 3353 m (11000 ft) until the g-load is less than 2.33 g.
Below 3353 m (11000 ft)
The barostat controlled g-switch prevents the operation of the BTRU below 3353 m (11000 ft) until the g-load is less than 5.43 g.
ADU modes
AUTO
When the sear is removed, the firing pin is released. The firing pin fires a 4sec time-delay cartridge. After 4 seconds, the cartridge fires, gas pressure retracts a piston that disconnects the straps attaching the PSP to the lower harness. The PSP falls and hangs on the end of the lowering line.
MANUAL
A mechanism prevents the operation of the firing pin and the auto-release of the PSP from the harness. When separated from the seat and in parachute descent, the pilot can manually release the PSP from the harness by operating the KIT RELEASE handle attached to the left side of the PSP.
List components of ejection seat (Left top down followed by right top down)
Left boxes
- CFS seat trigger
- Manual Override handle
- Leg-restraint lines release level
Right boxes
- Emergency oxygen handle
- PSP kit release handle
- Emergency oxygen pressure gauge
- Quick-release fitting
- Seat firing handle
