WINDSHIELD WIPERS

TM 1-1510-223-10 1 crew mask =LPM (100%), 1 passenger mask =LPM (c) Method. Multiply 3,226 L X 0.84 = 2,709.8 L Multiply 2 crew X 7.2 LPM = 14.4 LPM Multiply 1 passenger X 3.7 LPM, add 14.4 LPM crew plus 3.7 LPM passenger = 18.1 LPM. Divide 2,709.8 L by 18.1 LPM = 149.7 minutes. g. Oxygen Cylinder Capacity Example Problem. Oxygen cylinder capacity is determined by using figure 2- 25. (1) Example one. (a) Wanted Percent of capacity at known pressure and temperature and pressure when temperature decreases. (b) Known. Pressure =1,600 PSIG stabilized cylinder temperature is estimated at 200C, decreased stabilized cylinder temperature is estimated at -30°C (c) Method Enter 1600 PSIG move up to 20°C line, move right to 84% then move left on 84% line to -30°C line, and move down to 1250 PSIG. (2) Example two. (a) Wanted. 100% capacity pressure at known temperature. (b) Known. Temperature =-30°C (c) Method. Move left along 100% line to - 30'C line and move down to 1420 PSIG. 2-62. WINDSHIELD WIPERS. a. Description. Two electrically-operated windshield wipers, are provided for use at all flight speeds. A rotary switch (fig. 2-13) placarded WINDSHIELD WIPER, located on the overhead control panel, selects mode of windshield wiper operation. An information placard above the switch states: DO NOT OPERATE ON DRY GLASS. Function positions of the switch, as read clockwise, are placarded: PARK - OFF - SLOW - FAST. When the switch is held in the spring-loaded PARK setting, the blades will return to their normal inoperative position on the glass, then, when released, the switch will return to OFF position terminating windshield wiper operation. The FAST and SLOW switch positions are separate operating speed settings for wiper operation. The windshield wiper circuit is protected by one 10-ampere circuit breaker, placarded WSHLD WIPER, located on the overhead circuit breaker panel (fig. 2-7). Figure 2-25. Oxygen Cylinder Capacity Do not operate windshield wipers on dry glass. Such action can damage the linkage as well as scratch the windshield glass. b. Normal Operation. To start, turn WINDSHIELD WIPER switch to FAST or SLOW speed, as desired. To stop, turn the switch to the PARK position and release. The blades will return to their normal inoperative position and stop. Turning the switch only to the OFF position will stop the windshield wipers, without returning them to the normal inactive position 2-63. FERRY CHAIR. For ferry purposes, a forward facing chair is provided that may be attached to the floor tracks at fuselage station 211.87. 2-64. CIGARETTE LIGHTERS AND ASH TRAYS. The pilot and copilot have individual cigarette lighters and ash trays mounted in escutcheons outboard of their seats. The cigarette lighters are protected by a 5-ampere circuit breaker, placarded CIGAR LIG HTER, on the overhead circuit breaker panel (fig. 2-7). 2-57