Tham khảo tài liệu 'b17 pilot flight instructions part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | USE OXYGEN INTELLIGENTLY Use property fiHed mail Chack far hall by holding thumb over mask hose disconnect fitting and inholo normally. Prior to flight lw yi check this knurled collar If mult ha TIGHT. For normal operation the Auto-Mix should always be turned to ON position as shown here. This assures a proper mixture of oxygen with the outside air. When Auto-Mix is OFF the regulator will furnish pure oxygen on demand. To get oxygen place the end connection of mask hose into the fitting on end of feeder hose coming from the Demand Regulator. If Regulator fails to function turn on Emergency Valve This allows a constant flow of oxygen to the mask direct from the supply line. Flow Indicator will not operate under this condition and oxygen will flow from the supply line at a higher rate. Watch your pressure gage. Figure 16 - Use of Oxygen CAUTION EXERCISE EXTREME CAUTION TO INSURE THAT OXYGEN EQUIPMENT DOES NOT BECOME CONTAMINATED WITH OIL OR GREASE. FIRE OR EXPLOSION MAY RESULT WHEN EVEN SLIGHT TRACES OF OIL OR GREASE COME IN CONTACT WITH OXYGEN UNDER PRESSURE. 1. Have your own mask which has been checked for fit by the oxygen officer. 2. Carry your bail-out cylinder charged to 1800 pounds. 3. Check to see that there is aportable walk-around unit at each station filled to 400 pounds and in working order. 4. Check system pressure before flight it should be 400 pounds. 5. Check function of demand regulator in both on and off positions. Flow gage should function when auto-mix is OFF. 6. Check knurled collar on elbow connecting mask hose to regulator for tightness. 7. Open emergency valve to check flow then close. This valve should not be open except incase of emergency. 8. Turn regulator to auto-mix on position. 9. Use auto-mix off only - When oxygen officer advises the use of pure oxygen before take-off in which case use it all the way up as protection against bends When treating men for shock loss of blood or as protection against poisonous gas. 10. Start using oxygen
