Oxygen Flashcards
Oxygen Requirements over 12,500
Minimum flight crew Must use oxygen after 30 mins
Oxygen requirements Above 14,000
Minimum flight crew is provided with and uses supplemental oxygen.
Oxygen requirements Above 15,000
Each occupant is provided with supplemental oxygen.
Oxygen requirements Above FL250
At least a 10 minute supply of supplemental oxygen for each occupant on board
Oxygen requirements above FL350
One Pilot must be using oxygen if the other leaves the control.
Oxygen requirements above FL410
Both pilots must use oxygen at the controls.
4 types of Aircraft oxygen system design.
-Chemical Oxygen
-Potable gaseous
-On-Board Oxygen generating system
-Liquid oxygen system
Chemical oxygen System
•used in large aircraft for 10 minute supply
•face mask that drops, chemical reaction with sodium chlorate
Portable Gaseous Oxygen System
•Provides oxygen for aircraft’s that lack an oxygen system or for passengers when pilots are using theirs
•consists of
-Container
-Regulator
-Mask outlet
-Pressure gauge
On-Board oxygen generating system (OBOGS)
•converts engine compressor bleed air to oxygen-rich breathing air and pressurized air for at the correct pressure and temperature
•provides a continuous supply of breathing air for crew while the engine is operating
Liquid Oxygen System
Liquid oxygen systems, or LOX, is used in some jet aircraft because LOX storage occupies less space and weigh less than those used for gaseous oxygen
(Similar to portable but uses liquid oxygen)
7 types of Supplemental Oxygen Delivery Systems
•Cannula
•Continuous-Flow Oxygen system
•Electrical Pulse Demand
•Continuous Flow
•Constant Flow
•Diluter Demand
•Pressure Demand
Cannula delivery system
•A cannula is an ergonomic piece of plastic tubing that runs under the nose and is often used to administer oxygen in non-pressurized aircraft
•Used up to 18,000 feet and are not authorized to use above.
Continuous-Flow oxygen Delivery System
•The passenger mask typically has a reservoir bag, which collects oxygen from the continuous-flow oxygen system when the mask user is exhaling
Electrical Pulse Demand oxygen delivery system
•delivers oxygen by detecting an individual’s inhalation effort and provide oxygen flow during the initial portion of inhalation
•can reduce the amount of oxygen needed by 50-85%
•incorporate an internal barometer that automatically compensates for changes in altitude by increasing the amount of oxygen delivered for each pulse as altitude is increased