B-17 Pilots Manual.pdf

adio compass receiver is desired. If only visual indicationis desired, the switch does not have to be setin the "COMP"'position.(Q) The radio compass equipment is designedto perform the following functions:1. Aural reception from the fixed antenna orfrom the rotatable loop. For signal reception duringinterference caused by prec ipitation static or proxim ~ity of signals, the loop will prove superior.~. Aural..null directional indication of an incomingsignal with the loop only in use.~. Visual unidirectional indication of an incomingsignal.(0 The receiving unit is turned on or off by aswitch on the face of the remote control box, which,in addition to having an "OFF" position, has threeother positions: "COMP," "ANT," and "LOOP."1. With the switch in the "COMP" position,both the rotatable loop and the fixed antenna are in use.~. In the position marked "ANT" only the fixedantenna is in use.~. With the switch turned to the "LOOP" position,only the rotatable loop is in use.(Q) If the green indicator ,on the face of the controlboxdoes not light, depress button marked "CON-TRoL" to establish control of the set at this unit.Select frequency band desired as indicated in kilocy~cles on the face of control box and tune by use of thecrank to the desired frequency. The loop may be rotatedtoany positionas indicated on the radio compassazimuth indicator by use of switch marked "LOOPL-R." (See figure 29.) This particular operation ispossible only when operating on "LOOP" position ofthe selector switch. During periods of severe precipitationstatic, operate on "LOOP." For best auralreception rotate the loop by means of the "LOOPL-R" switch until a maximum signal is obtained.Proper volume may be obtained by use of knob marked"AUDIO."(5) MARKER BEACON EQUIPMENT RC-43. ,~Since the operation of the marker beacon equipmentis fully automatic, no manual operation is necessary.As the ship passes over a fixed point from which amarker beacon signal is being transmitted; the signalis picked up by the receiver, causing the indicator toflash on, showing the pilot that he has passed over amarked beacon. The marker beacon equipment issimultaneously turned on when the radio compass isput into operation. The position of the interphone jackbox switch does not affect the operation of the markerbeacon equipment.(6) LIAISON SET SCR-287.(;0 The liaison equipment is to be used for long..range communication. Limited control is available tothe pilot. The type of reception and transmission de"sired must be forwarded to the radio operator, whowill in turn put the radio equipment in operating condition.(Q) Set the interphone jack box switch in "LIAI>SON" position to receive or transmit with the liaisonequipment.(0 It is possible for all crew members to receiveon this equipment, but only the pilot, copilot, andradio operator may transmit.(7) RADIO SET SCR-535 (IFF). - The remote"OFF -ON" switch for this equipment is located on thetop of the instrument panel hood. The two destroyerpush~button switches are located to the left of the"OFF -ON" switch. The destroyer switches shouldbe used only when it is contemplated abandoning theairplane over enemy territory. When both destroyerpush buttons are pressed simultaneously, a detonatoris set off in the receiver which is located in the radiocompartment. The explosion of the detonator willdestroy the receiver internally. No damage should bedone to either the airplane or personnel at the time ofdestruction of the set, but bodily contact with the receiverat the time of detonation should be avoided.NOTERegeneration adjustment of the IFF set mustbe made on the ground prior to flight in orderto insure correct operation of the equipment.,-~-- --~-- --- .,~'--' ~.~~ - -~~~ n_~--= ~-~-- -_.,-" -----------' -'--- -- ---,.~------ ,, - ,--:,,-~~ ,C c- --' .," . '. .~. ~-~-~