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Physiology of FlightObjective:• Know the protective
equipment used in actual flight
Protective Equipment: OverviewDescribe the protective
equipment used by pilots and astronauts.
Today’s lesson will focus on:Oxygen SystemsPressure SuitsCabin PressurizationG SuitsEjection Seats
Protective EquipmentProtective Clothing and
Equipment• Three types of oxygen
breathing systems. Continuous-flow Diluter-demand Pressure-demand
• Oxygen masks are used above 10,000 feet in unpressurized Air Force aircraft.
Protective EquipmentProtective Clothing and Equipment
• Oxygen was first supplied by an oxygen mask then by a pressure suit.
The pressure suit is the basis for space suits.• Partial Pressure suit
• Pressurization to chest and head, partial to arms and legs
• Full Pressure Suit• Incases the entire body, generally includes a self contained oxygen
generator to assist in movement
Protective EquipmentPressurized Cabins
• The first American-built pressurized cabin was developed in 1937 with the XC-35.
• The difference in pressure between the atmosphere in the cabin and that on the outside is called the pressure differential.
• The Federal Aviation Agency (FAA) mandates that cabin altitude cannot exceed 8,000 feet on civilian airliners
• Most military and civilian cargo aircraft keep the cabin altitude a little higher to lessen the impact of decompression
Empty bottle of air closed at 8000 ft cabin pressure at sea level
Protective EquipmentProtective Clothing and
Equipment• Modern G-suits
Blood
Pressure
Protective EquipmentEscape Equipment
ParachutesEjection seat
Protective EquipmentEscape Equipment
• Ejection-seat system • Usually equipped with
harness, guardrails, a footrest, and a headrest
Aces II“Zero/Zero”
Seat
Protective EquipmentTiming an Ejection
•0 seconds - Pilot pulls cord; canopy is jettisoned or shattered; catapult initiates, sending seat up rails. •0.15 seconds - Seat clears ejection rails at 50 feet (15 m) per second and is clear of surrounding cockpit; rocket catapult ignites; yaw motor fires, inducing slight yaw to assure man-seat separation. (Burn time of all motors equals 0.10 seconds.)
•0.50 seconds - Seat has lifted to about 100 to 200 feet (30.5 to 61 m) from ejection altitude.
•0.52 seconds - Seat-man-separator motor fires; cartridge fires to release crewmember and his equipment from seat; drogue gun fires parachute
•2.5 to 4 seconds - Main parachute is fully deployed.
Flight Simulators
Barany Chair• A rotating chair with a large
bearing system to ensure smooth operation.
• Allows trainee to both experience and witness the effects of spatial disorientation.
Aircrew TrainingEjection Seat Training Parachute
Training
Aircrew TrainingG-Force Training and
Simulator
Aircrew TrainingWater Survival
Training
Physiology of FlightObjective:• Know the protective
equipment used in actual flight