Albett Cluett's notes on turrets and fighter aircraft gun harmonisation

MCluettAV1209046-150515-13.pdf

Title

Albett Cluett's notes on turrets and fighter aircraft gun harmonisation
Form 619

Description

Detailed descriptions of the workings of Bristol, Boulton Paul and Fraser Nash turrets. Procedures for gun harmonisation of Hurricane, Typhoon, Beaufighter, P-51 and Spitfire

Publisher

IBCC Digital Archive

Contributor

Anne-Marie Watson

Rights

This content is available under a CC BY-NC 4.0 International license (Creative Commons Attribution-NonCommercial 4.0). It has been published ‘as is’ and may contain inaccuracies or culturally inappropriate references that do not necessarily reflect the official policy or position of the University of Lincoln or the International Bomber Command Centre. For more information, visit https://creativecommons.org/licenses/by-nc/4.0/ and https://ibccdigitalarchive.lincoln.ac.uk/omeka/legal.

Format

Cover and 19 handwritten pages

Language

Identifier

MCluettAV1209046-150515-13

Coverage

Transcription

Form 619.

[Underlined] TURRETS [/underlined]

[Underlined] 1209046 [/underlined]

[Underlined] L.A.C. CLUETT. A.V [/underlined]

ROYAL AIR FORCE

Notebook for use in Schools.

[Page break]

[Underlined] THEORY OF BRISTOL TURRETS. [/underlined] A.P. 1659. (B)

[Underlined] OIL [/underlined] IS USED IN TURRETS BECAUSE IT WILL NOT [underlined] RUST – EVAPORATE, [/underlined] + HAS A [underlined] LOW FREEZING POINT; [/underlined] IT IS NON-COMPRESSIBLE; UNLIKE WATER
IF WATER WAS USED IN TURRETS, WHEN IT GOT HOT, IT WOULD GIVE OF STEAM + STEAM IS COMPRESSABLE.

[Underlined] VISCOSITY [/underlined] CLINGING ACTION OF OIL – GIVING ITS OWN RESISTANCE.
THICK OIL - GREAT VISCOSITY – THIN OIL – LITTLE VISCOSITY.

[Underlined] POWER OR PRESSURE [/underlined] IS GENERATED BY THE ENGINE DRIVEN PUMP. (E.D.P) INTO THE SYSTEM – WHEN MASTER VALVE IS OPERATED PRESURE IS BUILT UP IN SYSTEM 600lbs □”. WHICH IS ENOUGH TO OPERATE THE 3 ROTATION VALES. I/E.

(1) TURRET ROTATION –(2) ELEVATION + DEPRESSION (3) INDEPENTEND GUN ROTATION.

TEST HYDRAULIC LOCK (D.M.L) WITH 14-15 STONE WEIGHT ON SEAT.

3 WASHERS FOR JACK TUXORAM (BEHIND WILLS.)
WILL’S RING (GAS FILLED)
G.A.C.O (PISTON WASHER)

[Diagrams]

[Page break]

[BOULTON + PAUL TURRETS [/underlined] A.P. 1659 (C)

[Underlined] PRESURE REGULATOR BOX. [/underlined]

POSITIONED BETWEEN HYDO-GENERATOR + GUN RAM.

[Underlined] P.R BOX [/underlined] GIVES A HYDRAULICAL LOCK TO SYSTEM WHEN CONTROLS ARE LEFT. PREVENTING GUN CHATTER + GUNS FROM SINKING - OR ANY MOVEMENT.
MEANS OF LOCKING GUNS IN POSITION.
PERMITS FREE FLOW OF OIL FROM TOP TO BOTTON OR VICE VERA OF GUN RAM WHEN ELLIPTICAL CAM IS OPERATED.

[Diagram]

[Underlined] PRESURE REGULATOR BOX [/underlined]

[Underlined] FREE + ENGAGED LEVER [/underlined] OPERATES THE [underlined] AZIMUTH DRIVE [/underlined] – IN OR OUT WITH INTERNAL CUT WHEEL AT THE SAME TIME THE [underlined] BY-PASS VALVE [/underlined] IN THE [underlined] PRESURE REGULATOR BOX. [/underlined] AS WELL AS THE [underlined] GUN FIRING CIRCUIT BREAKING SWITCH [/underlined]

WHEN LEVER IS OPERATED TO [underlined] FREE [/underlined] YOU CAN ELEVATE + DEPRESS – ROTATE THE TURRET BY HAND.

[Page break]

[Underlined] BOULTON PAUL TURRETS [/underlined] A.P. 1659 (C)

[Underlined] FAIRINGS MECHANISM [/underlined]

[Diagram]

WHEN RAM OR RAMS ARE OPERATED – AIR IS TRAPPED OR COMPRESSED IN THE TOP OF THE RAM. 90lbs □ P.S.I” 40-90

[Underlined] FAIRING’S LEVER [/underlined] FOUND ONLY ON [underlined] ‘A’ [/underlined] TYPE TURRETS.

INTER LOCK GEAR ON TYPES A + C TURRETS.
INTER LOCK GEAR WITH [underlined] STURRIP [/underlined] ON RAM – IS ONLY FOUND ON TYPE ‘A’ TURRES. (ELEVATION 84% [Diagram]
INTER LOCK GEAR WITHOUT [underlined] STURRIP [/underlined] ON RAM BUT [underlined] CLAW [/underlined] IS ONLY FOUND ON TYPE ‘C’ TURRETS {ELEVATION + DEPRESSION} 60% 45% [Diagram]

[Underlined] INTER LOCK GEAR [/underlined] IS TO PREVENT GUNS FROM BEING OPERATED [underlined] ON TO [/underlined] THE FIXED FAIRING OR [underlined] INTO [/underlined] BY ROTATION. (FIXED FAIRING).

[Underlined] GUN FIRING CIRCUIT [/underlined] IT TAKES [underlined] 5AMP [/underlined] PER GUN FIRING SOLEOID. (20 AMP [inserted] 4 -GUNS [/inserted] A TURRET (10 AMP ‘C’ TURRET 2 GUNS) ONLY A MAXIMUMOF 3 AMPS IS ALLOWED TO GO THROUGH THE GUN FIRING BUTTON. THE REST IS BY-PASS TO THE RELAY SOLENOID.

[Diagram]

[Page break]

[Underlined] BOULTON PAUL TURRETS. A.P. 1659 (C) [/underlined]

[Underlined] GUN FIRE INTERRUPTER [/underlined] (G.F.I)

[Diagrams]

TO CHECK G.F.I LINE UP DATUM LINES TO LEFT [inserted] (PORT) [/inserted] OF TURRET (90% D.A)
GUNS MUST BE HORIZONTAL – IF + IS TO LEFT OR RIGHT OF (MOVABLE BRUSH) [underlined] MARKER [/underlined] PULL DOWN ON ADJUSTER (VERNIER) TURN 1.24 TO MARK - TAKE BACK 1.25. GIVING 1 – 24/25 .6 NEARER MARKER. [Diagram] [Underlined] TYPE – A TURRET ONLY. [/underlined]

[Underlined] TYPE ‘C’ TURRET G.F.I SETTING. [/underlined]

POSITION GUNS FORWARD WITH SIGHT LINED ON RADION MAST – (19” EITHER SIDE)
LEVEL OFF GUNS WITH INCLINOMETER SO THAT GUNS ARE SAME READING AS TURRET.
ROTATE CYLINDER OF G.F.I WHEN GEAR WHEEL CLAMP HAS BEEN SLACKNED – TIGHTEN CLAMP NUTS WHEN SET. AJUSTING SLIDING BRUSH BY NUTS AT EACH END OF BOWDEN CABLE.

[Diagram]

[Page break]

[Underlined] BOULTON PAUL TURRETS. A.P. 1659 (C) [/underlined]

[Underlined] FILLING + BLEEDING. TYPE A + C TURRETS. 6-7 [/underlined] PTS (A.F OIL)

GET 6-7 PTS [underlined} CLEAN [/underlined] A.F OIL. REMOVE FILTER CAP – CLEAN FILTER.
WITH [underlined] FREE + ENGD. [/underlined] LEVER ‘ENGD’ + [underlined] RAM [/underlined] CLOSE, FILL; OPERATE RAM TO EXTENDED POSITION BLEEDING FROM UNION NUT AT BOTTON OF RAM. (TOP UP)
LOOSEN BLEEDER VALVE – OPERATE RAM -.

([Underlined ROTATION [/underlined]) F. + ENGD LEVER TO FREE LOOSEN BLEEDER VALVE ON HYDO-ROTATION MOTOR, OPERATE FOR ROTATION [underlined] BOTH [/underlined] WAYS; TIGHTEN UP WHEN CLEAR OIL COMES THROUGH, [underlined] TOP UP [/underlined].

[Underlined] ELEVATION + DEPRESSION + ROTATION [/underlined] B.P. (A.C.E.)

[Table]

[Underlined] B.P. TYPE “F” [/underlined] (NOSE – LINCOLN)

[Underlined] 2 X .5 BROWNNINGS [/underlined]

WEIGHT TURRET ONLY 295 lbs
WEIGHT + AMMO 572 lbs
GUN SIGHT REFLECTOR MK III [symbol] A.
HYDRALIC FLUID (REF. 34A/159)
TURRET SPEEDS 37% PER SEC ROTATION
40% PER SEC ELEVATION
RELIEF VALVES - ELEV 900 lbs □”
ROT 1250 lbs □”
ELECTRO-HYDRO (24V SUPPLY)
FIRE CONTROL – ELECT. “MAGNABOX” SOLENOIDS

[Page break]

[Underlined] FRAZER NASH TURRETS [/underlined] 1659 (A) [Underlined] THEORY [/underlined]

F.N. HYDRAULIC SYSTEM.
HOLDING 5-7 GALS.

[Diagram]

[Underlined] ENGINE DRIVEN PUMP [/underlined] (E.D.P) OUT PUT 7 TO 9 GALS. PER MIN. (SINGLE OR DOUBLE E.D.P.) WORKING PRESSURE 300 lbs □.

[Underlined] RELIEF VALVES [/underlined] MEANS OF REGULATING PRESURE. – [underlined] SPRING VALVE [/underlined] WORKING 305 – 325 lbs □.

[Underlined] VOKES FILTER [/underlined] ON EXHAUST PIPE [underlined] ONLY [/underlined] CHANGE FILTER PAD EVERY 6 MONTHS.
SAFTY DEVICE – SPRING LOADED FILTER PAD. (VOKES FILTER. – [/underlined] MAIN FILTER [/underlined])

[Underlined] RECUPERATOR [/underlined] (KEEPS STATIC PRESURE ON EXHAUST LINE.) 16 – 20 lbs.

1) [Underlined] RELEASE VALVE [/underlined] 275 – 295 lb. □ (ON PRESURE) WHEN VALVE WORKS OIL PASSES FROM PRESURE INTO EXHAUST THROUGH BOTTON OF RECUPERATOR.

A) MEANS OF FILLING SYSTEM. (BLEEDING AS WELL BUT ONLY AIR FROM CHAMBER OF VARIBLE VOLUME)

B) COMPENSATES FOR EXPANSION OR CONTRACTION OF OIL DUE TO CHANGING ELEMENTS.
C) ENSURES STATIC PRESURE OF 16-20 lbs AT ALL TIME. (ON EXHAUST SIDE) FELT ALL OVER SYSTEM.
D) ALLOW FOR OIL TAKEN FOR OR BY RAMS ON UPWARD STROKE OR DISPLACEMENT OF OIL ON DOWNWARD STROKE
E) MEANS OF BLEEDING CHAMBER OF VARIBLE VOLUME + ROTATION SIDE OF TURRET.

[Underlined] NOTE [/underlined] WORKING HEIGHT OF SPINDLE SHOULD BE 4” INCHES.

[Underlined] NOTE ALL [/underlined] A.F. OIL FOR OVER 20,000FT.
[symbol] USE 70% A.F. 30% D.T.D 109 (ENGINE OIL). FOR UNDER 20,000. [symbol] U/S OR NOT USED.

[Underlined] FLUID HYDRAULIC [/underlined] A/C LOW TEMATURE. (STORES 34A/159 USE IN PLACE OF A.F. OR 70/30
WHEN CHANGING OILS OVER TO FLUID H A/C L.T. SEE SYSTEM IS WELL DRAINED.
(NEVER MIX. FLUID HDYO. A/C L.T. WITH ANY OTHER OILS)

[Page break]

[Underlined] FRAZER NASH TURRETS [/underlined] A.P. 1659 (A)

[Underlined] ROTATING SERVICE JOINT. (R.S.J) [/underlined] WILL BE FOUND AT THE TOP OR BOTTOM OF THE TURRET – DEPENDING ON INSTALLATION [underlined] NOSE [/underlined OR [underlined] TAIL [/underlined]

R.S.J – MEANS OF BRINGING IN UNINTERUPTED FLOW + SUPPLY OF [underlined] OIL + ELECTRIC + RADIO – OXY [/underlined] AND EXHAUST OIL BACK TO E.D.P.

[Underlined] VALVE BOXES. [/underlined] 2 TYPES. INLINE – TRIANGLE.

[Diagram]

[Underlined] TRIANGLE VALVE BOX FOR 2 GUN TURRETS [/underlined]

[Underlined] INLINE VALVE BOX WITHOUT [/underlined] BANJO VALVE IS FOR F.N. [underlined] 20 – R.S.J [/underlined] AT BOTTOM OF TURRET JOINING VALVE BOX

[Underlined] INLINE VALVE BOX WITH BANJO VALVE [/underlined] JOINED WITH R.S.J – FOR 20.[underlined]A 120 ECT.

ALL INLINE VALVE BOX USED WITH BOTTON ENTRIES EXCEPT F.N.50.

[Underlined] TRIANGLER [/underlined VALVE BOX USED WITH TOP ENTRIES F.N.5. BUT [underlined] F.N.50 [/underlined] AS WELL.

[Underlined] BANJO VALVE [/underlined] FITTED TO INLINE V. BOX TO STOP [underlined] GUN SINKAGE. [/underlined]

[Diagram]

[Underlined] VANE OIL MOTOR [/underlined] SINGLE OR ([underlined] DOUBLE [/underlined] FOR WIND RESISTANCE F.N.5)
CONVERTS HYDRAULIC [underlined] PRESURE [/underlined] INTO MECHANICAL FORCE

[Diagram]

COMPONENTS.

ROTOR + 6 VANES + PINS
STATOR SLEEVE SET ECCENTTRICALLY TO ROTOR. (FOR ROTATION OF TURRET.)
2 CLEANING FILTERS 1 ON EACH LINE – CLEANS ON PRESURE – SENDS DIRT BACK WHEN CHANGED TO EXHAUST. ([Underlined] CHANGE [/underlined] FILTER ONLY WHEN DAMAGED)

[Page break]

[Underlined] FRAZER NASH TURRETS [/underlined] AP 1659 (A)

[Underlined] FILLING + BLEEDING [/underlined] (CLEAN OIL – 5-6 GALSS.) [Underlined] RAMS HALFWAY. [/underlined]

(A) REMOVE FILLER CAP + TOP-UP RESERVOIR. ([underlined] WHEN [/underlined] SYSTEM IS EMPTY
->
(B) SLACKEN OFF BOTH UNIONS ON E.D.P + CARRY ON FILLING + PUMPING.
(C) WHEN CLEAN OIL APPEARS AT EXHAUST UNION – TIGHTEN UP. – CONTINUE PUMPING UNTILL CLEAN OIL COMES TO PRESURE UNION – TIGHTEN UP.
(D) FILLING + PUMPING – PUT SPINDLE UP TO 6” FOR A TIME (AIR CAN THEN GET OUT)
(E) OPERATE CONTROLS IN ALL DIRECTIONS – TO FILL COMPONENTS + PIPE LINES ([underlined] RAM + V.O.M) [/underlined]

[Underlined] BLEEDING [/underlined]

(A) SLACKEN BLEED SCREW ON RAM [underlined] BODY [/underlined] + OPERATE [inserted] CONTROLS [/inserted] FOR RAM EXTENSION
TIGHTEN UP WHEN CLEAR OIL APPEARS.
(B) SLACKEN BLEED SCREW ON RAM PISTON – OPERATE CONTROLS FOR DEPRESSION – TIGHTEN UP WHEN CLEAR OIL APPEARS. (SPINDLE WILL DROP.)
(C) CHECK RECUPERATOR – PUMP UP TO 6” IF NECESSARY.
(D) START A/C ENGINE – OPERATE CONTROLS FOR [underlined] ALL [/underlined] – WATCH SPINDLE – (RECUPERATOR SPINDLE WILL DROP AS OIL IS GOING UNDER PRESURE.) TOP UP AGAIN TO 6”
(E) STOP A/C ENGINE – [underlined] RAMS CLOSED [/underlined] – (BLEED PALMER FIRING GEAR) ->
(F) SEE GUNS ARE AT SAFE OR TAKE OF REAR SEAR BEFORE RELEASE UNITS – PRESS TRIGGERS UNTILL ACCUMULATOR IS EMPTY – BLEED FROM REAR SEAR RELEASE UNITS – BLEED DOWN TO 4” – THOUGH BLEED SCREWS OR (DRAIN TAP.)

[Underlined] REPLACE FILL CAP [/underlined]

[Underlined] BLEEDING STATIC. DI [/underlined]

SAME AS [underlined] ABOVE [/underlined] WITHOUT SYSTEM UNDER PRESURE – BLEEDING FROM ALL SCREWS.

[Underlined] WHEN BLEEDING F.N TURRETS [/underlined] + RECUPERATOR IS IN A POSISTION THAT SPINDLE CANNOT BE SEEN – TO BLEED FROM 6” – 4” DRAW OFF 1/3 PT OF OIL. (APPROX. MESURE)

[Page break]

[Underlined] FRAZER NASH TURRETS. AP 1659 (A) [/underlined]

[Underlined] REARMING 5-50 – 64 – 4 [/underlined]

[Diagrams]

[Page break]

[Underlined] SERVO FEED CONTD FRAZER NASH TURRETS [/underlined] A.P. 1659 (A)

THEN FIND THE TWO HOLES WHICH CORRESPOND; COUNT ROUND (WITH ARROW ) 3 MORE HOLES, (NOT 3 WITH THE HOLE YOU START) LINE THEM UP – REPLACE PIN. + CHECK MESUREMENT, IF IT IS NOT ENOUGH LINE UP THE NEXT HOLE. (ROUND IN WAY ARROW POINTS.) CHECK. REPLACE LOCKING PIN + NUT.

[Underlined] F.N. SERVO FEED [/underlined]

TAIL TURRETS. FN 120 – 20. WARWICK – LANCASTER – WELLINGTON – STIRLING – SUNDERLAND.

1900 ROUNDS PER TANK + 600-750 RDS PER TRACK.
SPECIAL BELT LINKS TO BE USED. MK II B. (SERVO) – 3 RAMS. (I ARMOUR PLATING)

ADJUSTMENTS

1. PLATEN RETURN SPRING – 5-8 1/2 lbs.
2. CLUTCH THROW OUT 22 – 24 MK II (19-21. MK I)
3. PLATEN TRAVEL 13/16
4. 2 FT LENGTH OF BELT SHOULD RUN DOWN DUCT.
5. NO MORE THAN 28lbs SHOULD BE NEEDED TO PULL BELT THROUGH DUCTS WHEN A/C IS IN FLYING POSITION.

[Page break]

[Underlined] FRAZER NASH TURRETS A.P 1659 (A). [/underlined]

[Underlined] F.N 50 (MID [/underlined] UPPER) [Underlined] TABOO + ROTATION RESTRICTOR VALVE MECHANISMS. [/underlined]

[Diagrams]

[Underlined] GUN TRAVEL INTERRUPTER MECHANISM. [/underlined] OR (TABOO MECHANISM.)

WHEN GUNS ARE AT BEAM(S) DEPRESSED + ARE ROTATED FORE OR AFT. TABOO ROLLER RIDES FAIRING ON FUSELAGE – WHICH OPERATES ELV. VALVE BY MEANS OF TABOO VALVES MECHANISM – WHICH LIFTS GUNS TO CLEAR FUSELAGE.
YOUR HAND CONTROL MOVEMENT IS TAKEN UP ON OR BY FUNK SPRING.

[Underlined] ROTATION RESTRICTOR VALVE. [/underlined] PREVENTS SWIFT ROTATION OF TURRET – FORE OR AFT WHEN GUNS ARE DEPRESSED AT BEAM, SO PREVENTING EXSESS STRAIN ON TABOO OIL VALVES; THIS ACTION (RESTRICTING) IS BROUGHT ABOUT BY THE OIL HAVING TO PASS THROUGH SMALL HOLES + PARTLEY CLOSED PIPE LINE TO V.O.M.

[Underlined] F.N. 50 [/underlined] M. UPPER [Underlined] LANCASTERS – STIRLINGS [/underlined] 2 V.O.M GANGED FOR WIND RESISTANCE.

ACCUMULATOR FITTED (7-8 BURSTS.) GUNS (2) FIRED BY SOLENOID. ELECTRIC FROM TRIGGERS TO G.F.I TO SOLENOID – BOWDEN CABLE FROM OTHER END OF SOLENOID TO GUN FIRING VALVE.

[Page break]

[Underlined] BOULTON PAUL TURRETS [/underlined] A.P. 1659 (C)

[Underlined] REARMING ‘A’ TYPE 4 GUNS [/underlined] EACH TANK HOLDING 600 ROUNDS (4 TANKS)
TANKS STOWED 2 ON TOP 2 UNDER-NEATH
TOP TANKS FEED LOWWER GUNS
BOTTOM TANKS FEED TOP GUNS

TO LOAD TANK – PUT ARMING STRAP IN TANK FIRST – CONNECTED TO AMMO BELT. FEED IN BELT. AWAYS PUT IN TOP TANKS FIRST.
DROP ARMING BELTS FROM GUNS CONNECT TO CORRECT BELT – PULL UP + FEED GUNS.

[Underlined] ‘C’ TYPE 2 GUNS 2 TANKS [/underlined] EACH HOLDING 1,000 ROUNDS.

TANKS AT BOTTOM OF TURRET. L + R. USE ARMING STRAPS SAME AS [underlined] ABOVE [/underlined] (‘A’ TYPE)

[Underlined] E TYPE [/underlined] 4 GUNS (TAIL) 8 TANKS – 2 PER GUN EACH HOLDING ABOUT 1250 ([underlined] 2 [/underlined] 2500)
TURRET FEED BY DUCTS FROM TANKS BY BOTTOM ENTRY

4 GUNS [underlined] 2 TOP [/underlined] R.H, SIDE L H, SIDE
RIGHT. H FEED L. H. FEED

2 BOTTOM. R.H, SIDE L.H. SIDE
L.H FEED R.H. FEED

(STRAP IN FIRST)
LOAD TANKS – FEED DOWN TO BOTTOM ENTRY – FEEDS TO FEED ASSISTER ARE SO

[Diagram]

[Page break]

[Underlined] BOULTON PAUL TURRETS 1659 (C) [/underlined]

[Diagrams]

B.P. ‘A’ TYPE. MID-UPPER

B.P. C TYPE NOSE (OR M-UPPER)

B.P. ‘E’ TYPE.

[Page break]

[Underlined] BOULTON PAUL TURRETS. 1659 c [/underlined]

[Underlined] BY-PASS VALVES. [/underlined]

[Diagram]

BY-PASS VALVES KEEP SEAT RAM + GUN RAM IN PHRASE WITH EACH OTHER

[Underlined] ELEVATION + DEPRESSION CIRCUIT TYPE ‘E’ B.P. [/underlined]

[Underlined] NO G.F.I OR HIGH SPEED BUTTON [/underlined]

[Underlined] FEED ASSISTER B.P. ‘E’ TYPE [/underlined]

F. ASSISTER DRIVEN BY CHAIN OFF [underlined] ELEC. [/underlined] MOTOR

[Diagrams]

[Page break]

[Underlined] BOULTON PAUL TURRETS. [/underlined] A.P 1659 (C)

[Underlined] FEED ASSISTER [/underlined]

WHEN STOPPAGEE OCCURS IN FEED WAY-S OR DUCKS. PRESURE IS PUT ON GEARING. BUT DIFFERENTIALS ARE FORCED TO KEEP TURNING; SPROCKETS ARE STOPPED OWING TO AMMO STOPPING, AND SO SHEAR WASHER PINS ARE BROKEN, ALLOWING SUN + PLANET PINIONS TO WALK OR GO ROUND DRIVE WHEEL + FEED SPROCKETS. THUS ALLOWING THE OTHER 3 FEEDS TO CARRY ON WORKING.

[Page break]

[Underlined] FIGHTER AIRCRAFT HURRICANE MK I – 8 BROWNINGS. [/underlined]

[Underlined] HARMONISATION AND INSTALLATION [/underlined]

[Underlined] HURRICANE MK I [/underlined] 8 BROWNINGS (4 EA WING)

[Diagram]

4 GUNS IN EACH WING – Nos FROM CENTER TO WING TIP 1-4.

[Underlined] PORT. W [/underlined]

Nos 1 + 2 GUNS R.H FEED
Nos 3 + 4 GUNS L.H FEED.

[Underlined] STARBOARD W. [/underlined]

Nos 1 + 2 GUNS L.H. FEED.
Nos 3 + 4 GUNS R.H. FEED.

[Underlined] FIRE + SAFE [/underlined] UNITS ON OUT-SIDE OR (L.H. SIDE ON P. WING. R.H. SIDE ON ST. WING)

[Underlined] GUNS [/underlined] FIRER FROM COCKPIT BY OR WITH DUNLOP PHEUMATIC FIRING SYSTEM 350lbs □”

[Underlined] REARMING [/underlined] REMOVE TANKS OR FILL TANKS IN WING – (REPLACE NEW TANKS -) FEED THROUGH AMMO TO RIGHT + EACH GUN – ENSURING F+S UNIT IS TO ‘SAFE’
COCK + FIRE (MANUAL) SEE ONE ROUND DROPS OUT - ON Nos 1.2.3. GUNS. ON No 4 GUNS COCK + FIRE TWICE – SEE 2 ROUNDS DRIP OUT – ENSURING POSITIVE LOADINGS.

D.I. ‘FIRE’ BUTTON TO ‘SAFE’ – SEE ENOUGH AIR IN SYSTEM FOR D.I 300lbs □”
REMOVE PANELS – RAISE COVER (BREECH) COCK GUNS – ENSURE ROUND DROPS OUT. No 4 GUNS COCK TWICE. RELEASE BREECH BLOCK (MANUAL) REMOVE RECOILING PORTIONS FOR D.I. CLEANING – REPLACE – COCK GUNS. ‘FIRE’ BUTTON TO [underlined] ‘FIRE’ [/underlined] SEE ALL CLEAR – PRESS BUTTON – B. BLOCKS + FIRING PINS. FORWARD. (CHECK No 4 GUNS WHEN ASSEMBLING) AS YOU CANNOT SEE F. PIN.) CHECK FIRING PINS ON OTHER GUNS – CLOSE LID – COCK – DROP 1 RD. OUT Nos 1.2.3 GUNS + 2 RDS OUT No 4 GUNS. ENSURING LOADED + LEAVING BREECH BLOCKS [underlined] FORWARD. [/underlined]

SIGN [underlined] FORM 700 FIGHTER A/C ONLY [/underlined]

[Page break]

[Underlined] HARMONISING HURRICANE MK I [/underlined] (8 BROWINGS.) + ALL F/AC.

GET A/C ON SET MARKS (PAINTED ON GROND). 50 YDS. JACK UP TAIL THEN NOSE, [Underlined] ROUGHLY [/underlined] TO LEVEL, DROP PLUMB LINES (2) N + TAIL LINE UP WITH CENTRAL LINE OF WALL PLAN, JACK UP NOSE SO WHEELS ARE JUST CLEAR OF GROUND; NEXT USE DATUN STICK + TEST WITH INCLINOMETER FROM WING TIP-TOP CROSS MOVEMENT - AJUST IF NEED BE. THEN TEST FOR NOSE OR TAIL HIGH - AJUST IF NEEDED. BEFORE GOING FURTHER CHECK OVER TESTS OR ALINEMENTS. CHECK MASTER GUN(S) (NEAREST TO WING ROT) WITH INCLINOMETER. THEN LINE UP GUNS TO RIGHT SPOTS + SIGHT (HURRICANE MK I FLIES 2% NOSE HEAVY MK IIc. 1% N HEAVY.)

SPITFIRE – TYPHOON – LEVEL.

D.I. FOR FIGHTER A/C

SEE FIRING BUTTON IS TO ‘SAFE’
INSPECT REFLECTOR SIGHT FOR SECURITY + B. + DNM SWITCH FOR CONTINUITYOF CIRCUIT
SEE SLIDING SUNSCREEN OPERATES FREELY, CATCH WORKS – CLEAN BOTH SUNSCREEN + REFLECTOR.
EXAMINE SIGNAL PISTOL + SEE RIGHT CARTRIDGES ARE IN A/C
CHECK AIR PRESURE.
IF INSTALLED, UNLOAD + CHECK SIGNAL DISCHARGER + RELOAD (5.6 1.2.3.4)
CHECK CAMERA MOUNTINGS. (G45)
UNLOAD + EXAMINE + CHECK GUN MOUNTING ONE AT A TIME
BROWNINGS .303 RELOAD TEST FOR FEED + EJECTION – LEAVE BREECH BLOCKS FORWARD, ROUND ON FACE.
20 M/M RELOAD – ENSURE RIGHT TENSION IS ON MAGZ. OR B.F.M. COCK GUNS.
REPLACE GUN PANALS ON WING – SECURELY – PLACE NOTICE ON CONTROL STICK [underlined] GUNS LOADED [/underlined]

RECHECK AIR PRESURE SIGN FORM 700.

[Page break]

[Underlined] TYPHOON MK I B [/underlined]

4 20 M/M CANNONS. 2 IN EACH WING.

AMMO TANKS (4 IN ALL) EACH HOLDING 125 ROUNDS ARE OUTBOARD OF EACH GUN
DUETS + B.F.M HOLDING 25 ROUNDS MAKES 150 ROUND IN ALL

[Underlined] PORT. [/underlined] W.2 X 20 M/M LEFT HAND FEED (A/C FLYS LEVEL)

[Underlined] ST. WING [/underlined] 2 X 20 M/M RIGHT HAND FEED (B.F.M.)

CAMERA SITUATED ON PORT WING + NEW MOD. + IS INSIDE FUSELAGE.

[Underlined] BEAUFIGHTER MK II B.F.M. [/underlined] OR MAG. FED.

4 X 20 M/M CANNON 6 BROWNINGS .303
4 CANNON IN FUSEALAGE 4 X .303 IN ST WING 2 .303 PORT WING. (6 IN ALL)

CANNON AMMO TANKS INSIDE FUSEALAGE HOLDING 300 ROUNDS EACH.
ALL 6 X .303 TANKS ARE ON LEFT OF EACH GUN. HOLDING 1,000 ROUNDS EACH.

20 M/M (2) PORT SIDE – INSIDE CANNON L. H FEED
PORT SIDE OUTSIDE CANNON R. H. FEED (B.F.M’s)
20 M/M/ (2) ST. SIDE – INSIDE CANNON R. H. FEED
20 M/M ST. SIDE OUTSIDE CANNON L. H. FEED

ALL 6 X .303 R.H FEED

CAMERA – OUTSIDE ON TOP OF COCKPIT.

[Underlined] HURRICANE MK II c [/underlined]

4 X 20 M/M CANNONS 2 IN EACH WING.
AMMO TANKS ON INSIDE OF GUNS. EACH HOLDIND – ROUNDS.

INBOARD CANNON TANKS + B.F.M 92 RDS
OUTBOARD CANON TANKS + B.F.M 87 RDS

PORT WING CANNONS R. H FEED ([underlined] B.F.M [/underlined])

ST.D. WING CANNONS L. H. FEED

A/C FLIES 1% NOSE HEAVY.

CAMERA SITUATED IN PORT WING.

[Page break]

[Underlined] P.51 OR MUSTANG. MK I [/underlined]

4 X .5 BROWNINGS 4 .300 BROWNINGS.
2 X .5 IN FUSEALAGE SYNCHRONISED. (AMMO + FEED N/A.)
2 X .5 1 IN EACH WING.
4 X .300 2 IN EACH WING

.5 AMMO TANKS 1 IN EACH WING BETWEEN 2 X .300 TANKS. .50 HOLDS 300 RDS.
.300 AMMO TANKS 2 IN EACH WING HOLDS 900 FORWARD 800 REAR TANK.

PORT WING 1 X .5 R. H. FEED
(INBOARD) 1 X .300 R. H. FEED
(OUTBOARD) 1 X .300 L. H. FEED

STD. WING. 1 X .5 L. H. FEED
(INBOARD) 1 X .300 L. H. FEED
(OUTBOARD) 1 X .300 R. H. FEED

4 X 20 M/M B.F.M (2 IN EACH WING)
TANK + B.F.M. HOLDS 125 RDS.

CAMERA IN ST.B. WING IN PLACE OF LANDING LIGHT.

[Underlined] MUSTANG MK II B. [/underlined]

4 X .5 2 IN EACH WING – CARRIES BOMBS OR L.R. FUEL TANKS.

[Underlined] SUPER MARINE SPITFIRE V. [/underlined]

2 X 20 M/M CANNON (1 IN EA. WING.) 4 X .303 BROWINGS. (2 IN EA. WING)
(1 X 20 M/M ON ITS SIDE INBOARD CENTER 1 BROWNING. OUTBOARD 1 BROWNING 1 WING)
20 M/M MAG FEED 60 RDS BROWING BELT 350 EACH TANK.

PORT WING. 20 M/M MAG. CENTER BROWING L.H. FEED. TANKS BETWEEN GUNS.
OUTSIDE BROWING R.H. FEED TANKS BETWEEN GUNS.

ST. B WING. 20 M/M MAG. CENTER BROWING R.H. FEED TANKS BETWEEN GUNS.
OUTSIDE BROWING L.H. FEED TANKS BETWEEN GUNS.

A/C FLIES LEVEL. CAMERA SITUATED IN PORT WING.

Citation

Albert Victor Cluett, “Albett Cluett's notes on turrets and fighter aircraft gun harmonisation,” IBCC Digital Archive, accessed March 21, 2019, https://ibccdigitalarchive.lincoln.ac.uk/omeka/collections/document/9872.

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