B-17 Pilots Manual.pdf

~ /8. VACUUM AND DE-ICING SYSTEMVACUUMWARNING---SWITCH 0/WING DE-ICER VALVE/po~ o~"9C", \ /K 0", / /(00~Jl/E,--- 0;~_m ~_~-- ~~/-:-:;:::;i O, DO" /' "6/ H FE \, : TO '-TO CRANKCA" . DE-ICER VALVE CONTRO'I~::' ""-ICER PRESSUR "N"I" ' ' EGAGE",,/ : TO PUMPSY I i ~ ' TO SE, ' ' A I ' LECTOR VALVEI TO BATTERY 'y' 1" "'-1 ~r-oTO I!Jr°BATTERY/9 STA.4~ PANEL . - - ~ - -- -.. "'N --'f~'~-r:""""" .~ ~ """'I1".Ii,",IIII:"- BY PASS OVERBOARO/1"- DE-ICERS "OFF" ~RAINI\')~I,---~-- :'." -~ ~::~- -"_..... ,'-- ---"! I: I I.':II II II I II \ IFICVACUUMPUMPVACUUMPUMPL.~ R.G~INSTRUMENTSVACUUM SELECTORVALVEOK"VACUUMLINES PRESSURELINES " ELECTRICALWIRINGFigure 13 - Vacuum and De-leer Flow DiagramA - SUCT I ON GAGEI - OIL SEPARATORB - DE-ICERPRESSURE GAGEC - SUCTIONRELIEF VALVED - CHECKVALVEE - OIL SEPARATORF - PRESSURERELIEF VALVEG-ROTARYDISTRIBUTINGVALVEH- TESTCONNECTIONKEY TO fiGURE 13J - MANIFOLD(INSTR. TUBIN~K - SELECTORVALVEL - VACUUMPUMPM - SHUT-OFFVALVEN - DE-ICER CONTROLVALVE0 - PRESSURE -RELIEF VALVEP - SHUT-OFFVALVEQ - VALVE:",- NO'-B~-~; ~I~~~,_.. --)OE -ICERS ON- DE-ICERS"ON"-Vacuum pumps are driven by engines Nos. 2 and 3.The selector valve on the side wall at the left of thepilot permits selection of either pump for deflation ofde-icer shoes and at the same time provides the useof the other pump for all other vacuum-operated equipment.When the de-icer control valve is "ON," itdirects the discharge of both vacuum pumps to the deicerdistributor valve and also starts the distributorvalve motors. When it is "OFF" the exhaust fromboth pumps is bypassed overboard, and the distributormotor is stopped.9