. - - -- :;>

::---: ~-=--~~SICTION IV

~A=-BOMBA.RDIER'S

COMPA.RTMENT --t~ \ --- -=- ~~~ ~- ~

.A...'ZJ

=-=-= S 4~ '-d~=- "

~ ~ \.4~

.:===- c::::: -~-=<:::

1. BOMB CONTROLS.

~. Bombs are normally released electrically, but~an be released mechanically in an emergency. Elec-trical control provides for .individual release of bombseither singly (selective) or continuously at prede-termined intervals (train). Mechanical control isalways in "SALVO," by operation of the bombardier'srelease handle or by operation of the emergency re-lease handles. The bomb release handle has threepositions.

. (1) In the "LOCK" position the bomb racks arelocked against any release of bombs except by meansof the emergency release handles.

(2) In the "SELECTIVE"positionthe bomb racksare prepared for electrical release by manual opera-tion of the release switch, or by automatic operationthrough the bomb sight.

. (3) The "SALVO" position, when the bomb doorsare open, mechanically releases all bombs simulta-neously and unarmed.

Q. The bombardier's release switch, mounted onthe forward end of the control panel, operates ineither direction to energize the release unit solenoidsthrough. the interval release control mechanism. Ahinged guard prevents accidental operation of thisswitch.

c. The interval release control unit is mounted atthe -bottom of the bombardier's control panel and maybe set to provide either "SELECT" or "TRAIN" re-lease. On airplanes serial Nos. 42-5050 and on,four switches on the bombardier's Control panel per-mit selection of any external or internal rack for elec-trical . release. Two indicator lamps beside the rackselector switches correspond to the external racks.Two additional rack selector switches in the bombbay permit elemination of either right or left bombbay from the release circuit if bomb bay fuel tanksare carried. Bomb release sequence is given in fig-ure 40. Any rack or combination of racks may beeliminated from the release sequence by turning off

51

KEY TO FIGURE 38

I. BOMBRELEASE SWITCH GUARD

Z. BOMBRELEASESWITCH

3. BOMBDOORCONTROLHANDLE

4. BOMBDOORSWITCH

5. BOMBRELEASEHANDLE

6. BOMBARDIER'SLIGHT SWITCH

Figure 38 - Bomb Controls

i!IIO

KEY TO FIGURE 39

I. AIR SPEEDINDICATOR2. BOMBRELEASEWARNING LAMP3. ALTIMETERSCALEERROR

CARDIl. BOMBDOORWARNINGLAMP5. ALTIMETER

6. PI LOTCALL SWITCH7. PANELLI GHT8. PHONE CALL LAMP9. WARNINGLAMPRHEOSTAr

10. EXTENSIONLIGHT SWITCHII. EXTENSIONLIGHT

12. ULTRA-VIOLETSPOTLIGHT13. CLOCKI~. ASHRECEIVER15. FHEEAI R THERMO~1ETER16. BOMBRACKSELECTOR

SWITCHES

17. BOMBINTERVALSWITCH18. ULTRA-VIOLETSPOTLIGHT

CONTROLSWITCH19. BOMBINDICATOR20. BOMBINDICATORCONTROL

KNOB

Figure 39 - Bombardier's Control Panel

the respective selector switch on the bombardier'scontrol panel.

d. A bomb arming solenoid in each external rackis controlled by a switch on the bombardier's panel.A red indicator lamp beside the switch is on when thebombs are armed.

NOTE

Some B-17F airplanes not equipped for exter-nal racks have only two rack selector switchesand no bomb arming switch on the bombardier'spanel. A few airplanes have no rack selectorswitches on the bombardier's panel but havea three-position switch in the bomb bay to turnoff either internal rack.

52

~. The bomb door control handle is at the left ofthe bombardier, forward of the control panel, andoperates a double-throw toggle switch controlling thesolenoid switches for the bomb door retracting motor.A lug on the side of the handle is located so that whenthe door handle is in the "CLOSED" position, thebomb release lever cannot be moved out of the "LOCK"position.

CAUTION

If bombs are carried above the 2000-poundbomb, they MUST NOT be released until theD-6 shackle and adapter have been removed.This definitely requires "SELECTIVE" re-lease control for the 2000-pound bomb.

BOMB STATIONS~

~o

l

eBOM B LOAD (

INDICATORSr/

300@

I 100 @500 /f.:\

1600 \!.!.J~----

//

(-~-(

'000

)1600.000

~OO~

L.H. EXTERNAL

LEFT HAND

ON ~ OFF @I INDICATOR

RIGHT HAND 1>-::LIGHTS

ON ~ OFF @.I EXT.RACKSEXTERNAL

SELECTOR

LEFT HAND

ON ~ OFFRiGItT HAND

ON @:1QJ OFF

INTERNAL

RACKBOMB RACK SELECTOR SWITCHES

BOMBARDIER'SPANEL

NQ,JINTERNAL RACKS ONEXTERNAL RACKS ON

SEQ. STA. SEQ. STA.

I I 12 ..r A.H. 13 93 .. .4 304 LH. .11 '25 3 III 338 24 17 147 4 18 358 U '9 15. 7 20 36.Q U 2' '7II . 22 38

'DO

l

f4\300 \3J

100 0ggg CD

100 CD

j-'00 00

9 300 300 Q~ ~OOOOO ,:~~ ~

\

~ '600 .600 ~G\9 '°0 100 0. 9 100

\.!.v 300 300 ~ \2::'J

@ '00 500 @ @ 300 \@ 100 100 @ D 100

\300 300 @f,6\ 1000 1000 .9~ \600 1600 'C:.) r;:;.. 500 I

c;,. 13' 1600I@ 100 100 ~r.;:, '00 500 D\!.Sf 2000 2000 I(Yr;:-, 100 100 Q ,~ \'000 300 300 0Ji ~ 300

{;;\ 1000 1000 r:;;;:.

~ 1600 1600 ~ @ 1,00{;\ .00 100 Q\!..J 500 500 ~ r;:;:..\300

~ 500

(0 300 JOO @

@ ,~ j~~3"OO/--...--

( . 1000 \1600 ,

I 2000 '\~O~

R.H. EXTERNALBOMB RACKSREARVIEW

NOTE: ANY UNLOADED OR UNCOCKEO STATION WILL BE AUTOMATICALLY SK'PPED- IN THE RELEASE SEQUENCE AND THE REMAINING STATIONS RELEASEO

ACCORDING TO THE NORMAL SEQUENCE.

BOMB BAY ODORS MUST BE OPEN TO DROP ANY BOMBS

CAUTION: CLOSING THE BOMB DOORS, RETURNING THE BOMB RELEAS~ LEVER TO

LOCK, OR TURNING OFF ANY RACK SELECTOR SWITCH MAY CAUSE THE RE'LEASE SEQUENCE TO RESUME AT SOME STATION OTHER THAN THE NOXT 'NTHE NORMAL SEQUENCE DUE TO THE ACTION OF THE RACK SELECTOR

RELAYS.

EXAMPLES

NO.4

NO. II

I~. RACKS OFFEXT. RACKS ON

SEQ. STA.

I R.H. [XT.2 L.H. EX

Nv..

m. 'NT. RACKSON lUT. RACKS OFF ';

SEQ. I STA

.234567

8

"32'233'5311738

]I RELEASE TWO 2000 LBBOMBS SELECT OR TRA.NOF 2.

* LARGE TYPE 0-6 SHACKLENUST BE REMOvED BEFORERELEASING BOMBS ABOvE.

Figure 40 - Bomb Release Sequence Diagram (Sheet 1)

53

..v.-L.H. INT. OFfR.H. INT. ONEXT. RACKS ON

SEQ. STA.

I R.H. EXT.2 L.H. EXT.3 29

I

\J

ANY BOMB LOAD WILL BE RELEASED ACCORDING TO ONEOF THESE SEQUENCES. COMBINATIONS OF RELEASE SEQUENCESFOR A PARTICULAR BOMB LOAD ARE POSSIBLE BY OPERATION OF

NO.1' NO.2

THE RACK SELECTOR SWITCHES BETWEEN "STICKS:'(SEE CAUTION ON SHEET NO.1)

NOS

NO.9

54

NO.lO

NO.6

NO.II

!NT. RACICS OFFEXT. RAC!(S ON

3equence Bomb 3 ta.1

R.H. Ext.1L.H. Ext.,

NO.3

NO.7

NO.l4

Figure 40 - Bomb Release Sequence Diagram (Sheet 2)

NO.l2

NO.l3 '

NO.4

NO.8

NO.l5

INTERNAL RACICS ONEXTERNAL RACICS ON

SeCJ'1ence Bomb 3t.. 3equence Bomb 3t..

1 1 23 112 R.H. Ext. 24 323 22 25 12II L.H. Ext. 26 335 2 136 23 34

3 29 14i 24 30 35

9 4 31 1510 25 32 3611 5 33 1612 26 34 3713 6 35 1714 27 36 3815 7

518

16 28 3917 8 39 1918 29 40 4019 9 41 2020 30 42 4121 10 43 2122 31 44 42

BOTH INTERNALRACKSONL.H. EXTERNALRACKOFFR.H. EXTERNALRACKON

3equence Bomb St.. Sequence Bomb 3t..

1 1 23 322 R.H. Ext. 24 123 22 25 334 2 26 135 23 27 346 3 28 147 24 29 358 4 30 159 25 31 36

10 5 32 1611 26 33 3712 6 ,4 1713 27 35 3814 7 36 1815 28 37 3916 8 38 1917 29 39 4018 9 40 2019 30 41 4120 10 42 2121 3) 43 4222 11

L.H. INT. ONL.H. EXT. ON

OTHERSOFF

Sequence Bomb St..

1 12 L.H. Ext.3 24 35 46 57 689

10 911 1012 1113 1214

i1516 1517 1518 1719 1820 1921 2022 21

R.H. INT. ONR.H. EXT. ON

OTHERSOFF

Sequence Bomb St..

1 R.R. Ext.2 223 234 24

g 2526

7 278 289 29

10 3011 3112 3213 3314 3415 3516 3617 3718 3819 3920 4021 4122 42

INTERNALRACKSONEXTERNALRACKSOFF

Sequence Bomb 3t.. 3equence Bomb 3t..

1 1 22 322 22 23 123 2 24 334 23 25 135 3 26 346 24 27 147 4 28 358 25 29 159 5 30 36

10 26 31 1611 6 32 3712 27 33 1713 7 34 3814 28 35 1815 8 36 3916 29 37 1917 9 38 4018 30 39 2019 10 40 4120 31 41 2121 11 42 42

BOTH INTERNALRAC!(SONL.H. EXTERNALRACKONR .H. EXTERNALRACKOFF

Sequence Bomb St.. 3equence Bomb 3ta.

1 1 23 322 22 24 123 L.R. Ext. 25 334 2 26 135 23 27 346 3 28 147 24 29 358 4 30 159 25 31 36

10 5 32 1611 26 33 3712 6 34

513 27 3514, 7 36 1815 28 37 3916 8 38 1917 29 39 4018 9 40 2019 30 41 In20 10 42 ' 2121 31 43 4222 11

L.H. INT. ONR.H. INT. OFFEXT. RACKSON

3equence Bomb3ta.

1 12 R.H. Ext.3 L.H. Ext.4 25 36 47 58 69 7

10 811 912 1013 1114 1215 1316 1417 1518 1619 1720 1821 1922 2023 21

L.H. INT. ONR.H. INT. OFFEXT. RAC!(SOFF

3equence Bomb 3ta.

1 12 23 34 45 56 6

9 910 1011 1112 1213 1314 1415 1516 1617 i1819 1920 2021 21

L.H. INT. .oNR.H. EXT. ON

OTHER3OFF

3equence Bomb3ta.

1 12 R.H. Ext.3 24 35 46 5.7 68 79 8

10 911 1012 1113 1214 1315 1416 1517 1618

i1920 1921 2022 21

INT. RACKSOFFL.H. EXT. ONR.H. EXT. OFF

3equnce I Bomb3ta1 I L.H. Ext

INT. RACKSOFFL.H. EXT. OFF

R.H. EXT. ON

Sequence [Bomb Sta.1 I R.H. Ext.

L.H. INT. OFFR.H. INT. ONEXT. RACKSON

Sequence Bomb St..

1 .R.H. 'Ext.2 223 L.H. Ext.4 235 246 25

2627

9 2810 2911 3012 3113 3214 3315 3416 3517 3618

51920

62122 4123 42

L.H. INT. OFFR.H. INT. OJ!EXT. RACKSOFF

Sequence Bomb Sta.

1 222 23

2425

5 266

299 30

10 3111 3212 3313 3414 3515 3616

51718 3919 4020 4121 42

R.H. INT. ONL.H. EXT. ON

OTHERSOFF

3equence Bomb Sta.

1 222 L.H. Ext.3 234 245 256 26

9 2910 3011 3112 3213 3314 3415 3516 3617 3718 3819 3920 4021 4122 42

MAXIMUMAIRPLANEGLIDE & CLIMB ANGLESFORBOMBRELEASE

IIITH IIHEEU AIIDFLAPS'UP: MAXIMUMALLOWABLEINDICATEDAIR SPEED,. 210 MPHSAH GLIDE ANGLEIS 15-IN°.

IIITH !IIIEELSANDFLAPSDOIIII: MAXIMUMALLOIIABLE.INDICA-TEDAIR SPEED IS 1117MPHSAFEGLIDEANGLEIS 13-1}2°.

SHALLTHEMAXIMUMALLOIIABLEINDICATEDAI R SPEEDBE EX-CEEDED. .

ANGLESSHOIIIIALLOII10° FORSAFETY.HOIIEYER,UNDERPER-FECTLYSMOOTHFLYINGCONDITIONS,IF IN THEAIRPLANE

COfoIIANDER'SOPINION CONDITIONSWARRANTIT/) THESEGIYENANGLESMAYBE EXCEEDEDBY NOTMORETHAN5 .NOTE: THE SAFEGLIDEANGLESAREBASEDON AN AIRPLANEGROSSIIEIGHT OF '10,000 LBS IIITH POIIEROFF AND NIND-MILLING PROPELLERS.

!III/LE THEMAJORITYOF BOMBSTATIONSIII LL PERMITRE-LE~SE OF BOMBSAT AN ANGLEIIHICH"' LL PRODUCEAN IN-DICATEDAI R SPEEDGREATERTHANTHATDESIGUTEDFORTHESAFEGLIDEANGLEOF THEAIRPLANE,UNDERNOCONDITIONS

,I,

t,

t.

100 lB. M-38A2RACKNO.

, a 4

2 a 3

100LS. M- 30RACK NO.

184

2 a 3

THEGLIDEORCLIMBANGLEI S THEANGLEINCLUDEDBETWEENTHE EARTH'SSURFACEANDTHE FUSELAGECENTERLINE.

THEANGLESLISTED IN THETABULATIONARETHEMAXIMUMATIIHICH BOMBSMAYBE RELEASEDIIITH A 10° CLEARANCEANGLEMAINTAINEDIN THEBOMBBAY.

RACK NO.

I a 4

2813

Figure 41 - Bomb Release Angles Chart

RACK NO.I 84

2 63

55

1100 lB. M-33

RACK NO. 5To4.GLIDE CLIMBANGLE ANGLE

29818 26 15283 378116 II 6

.'8I2C 5 2

300 lB. MK.I- MK.I MIRACK NO. 5TA.

GLIDE CLIMBANGLE ANGLE

2823 31 3331..18 4 4825 23% 22

13834 1..".. 152186 44 403089 27 25

28 3 31816 11'4 16'440819 11M. II If.4282..J 8 8

600lS. M-32RACK NO. 5TA.

GLIDE CLIMBANGLEANGLE

I a 4 2623 3214 292861 3411t 29 'It

2 a 3 31610 18 1'1 \/239618 10 1042621 5 IAt 6

600LS. MKIMI-MK.lMIlRACK NO. 5TA.

GLIDE CLIMBANGLE ANGLE

2861 33 23

2 813 3161C 18 12 'Iv39618 9'1. 614428121 5 214

300 lS. M- 31GLIDE CLIMB

RACK NO. 5TA.ANGLE ANGLE

2623 38 381h

I 814 4625 24 261/213634 16 1821&6 45 4431..3089 271/.. 29 Y,

2 a 3 37616 11 'k 2040819 I I 3f4 I" 'It42621 8 !I.. 10'12

500lS. M-43RACK NO. 5TA. GLIDE CLIMB

ANGLE ANGLE

I a 4 2823 33 33'"11832 17 191/..28tH 3411. 34

283 31610 18 'J. 2139618 10 12 'At42821 51,. 8

1I00lS. MK. III

RACK NO. 5TA.GliOE CLIMeANGLE ANGLE

12988 23 'k 9283 31616 10 II

41820 4 0

1000 lB. M-44RACK NO. 5TA.

GLIDE CLIMBANGLE ANGLE

2968 25 11283 31616 II 8

4162C 5 3

100lS. M -39RACK NO. 5TA. GLIDE CLIMB

ANGLE ANGLE1822 46 V.. 453824 34 If2 3431..

I a 4 4825 26 Y.. 2712833 20 \1.0 2 I II\,14835 16 162685 54112 521,-12881 40"" 40 v..3089 29 30

283 36815 22 238811 11 V.. 19/.(

40819 131ft 141ft42821 10 10"4

Figure 42 -Bombardier's Gun -Left Side

2. BOMBARDIER'S GUNS.

a. Most airplanes have two .50-caliber machine guninsfallations, one mounted through a window on eitherside of the bombardier's compartment. A .50-calibergun is also mounted in the center Plexiglas nose ofsome airplanes. In some airplanes ball and socketmounts are incorporated in the nose, side, and topwindows for insertion of a .30-caliber machine gun.

b. On B-17G airplanes a type A-16 chin turretwith two .50 calibre machine guns is mounted below,and is remotely controlled from, the bombardier'scompartment. '

3. INTERPHONE.

Two interphone jack boxes are on the right side ofthe compartment. Operating instructions are givenin section I, paragraph 10.4. OXYGEN.

The oxygen regulator and indicator panel are onthe right wall of the compartment. Operating instruc-tions are given in section I, paragraph 9.5. BOMB-SIGHTWINDOW

DEFROSTER.-A control knob in the floor

in front of the bombardier'sseat controls the flow of airto the bomb-sight window.Push forward to shut off theflow of air; pull aft to allowair to reach the bomb-sightwindow. Selection of hot andcold air is made by the pilot.

66

==

KEY TO FIGURE !IS

I. INTERPHONE JACKBOX ~. WINDSHIELDANTI-ICER2. GLIDEBOMBINGATTACH- PUMPSWITCH

MENTSTATIC PRESSURE 5. ANTI-ICER ALCOHOLSELECTORSWITCH FLOWVALVE

3. WINDSHIELDWIPER CONTROLS 6. OXYGENiNDICATORS

Figure 43 -Bombardier's Compartment -Right Side

6. WINDSHIELDWIPER ANDANTI-ICER.

Anti-icer and wiper controls for the bomb-sightwindow are on a panel at the bombardier's right.

!:. A toggle switch regulates the wiper motor"OFF," .. SLOW," or "FAST." A circuit breakerprotects the circuit in ca'se of an overload.

~. An uON-OFF" switch controls the alcohol andflow is regulated by a needle valve.

CAUTION

Do not operate the wiper on dry glass.

7. BOMB-SIGHTHEATING PAD.

Most airplanes are equipped with an eU!ctricalbomb-sight heating pad which may be plugged iDtothebombardier's suit heater receptacle.

Figure 44Bombardier's Seat

Adjustment