. 2018-02-18

  Notes - Draft/Incomplete  


GLOSTER  GL51F9  Javelin

  The story which didn't happen ... outside Atlantic Air Combat  
  See also : AAC Data Sheet
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Country = = QTY Aircraft Name 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
        40 GL51F1 Javelin.FAW1 1956 1957 > 1957                    
        30 GL51F2 Javelin.FAW2 1957 1961   1957 > > > 1961            
        22 GL51T3 Javelin.T3 1958 1965     1958 > > > > > > 1965    
        50 GL51F4 Javelin.FAW4 1957 1961   1957 > > > 1961            
        64 GL51F5 Javelin.FAW5 1957 1962   1957 > > > > 1962          
        33 GL51F6 Javelin.FAW6 1957 1961   1957 > > > 1961            
        142 GL51F7 Javelin.FAW7 1958 1961     1958 > > 1961            
        47 GL51F8 Javelin.FAW8 1959 1963       1959 > > > > 1963      
        (118) GL51F9 Javelin.FAW9 1960 1968         1960 > > > > > > >>
        (44) GL51F9R Javelin.FAW9R 1961 1968           1961 > > > > > >>

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Technical details:

Span 52 feet 0 inches; length 56 feet 4 inches and height 16 feet 0 inches.

Armament: aircraft were fitted with either two or four 30mm Aden cannon (installed in the wings) and could carry up to four Firestreak air-to-air missiles.

Engines: (starboard) one Sapphire Mk.205 turbojet (later Mk.209), (port) one Sapphire Mk.206 turbojet (later Mk.210).

Maximum weight, 44,700 lbs. Maximum speed was 535 knots at 45,000 feet. Maximum permitted speed, 1.08 Mach (achievable in a dive). Maximum altitude, 54,000 feet, with 50,000 feet being reached in 9 minutes and 15 seconds.

The T.3 variant, lacking reheat, and having the least powerful engines, (8,000lb. each) took 22 minutes to reach 45,000 feet.

Total fuel capacity was 950 gallons internally, two 250 gallon ventral tanks and up to four 230 gallon tanks underwing (FAW.9R only).

The FAW.8 and 9 both had a liquid fuel engine starting system, which was intended to maintain the very rapid engine starting requirement of the original specification, allowing for the more powerful engines fitted to these versions. A small cordite cartridge was fired to ignite the rocket propellant-like liquid fuel. The gas that resulted increased pressure which was fed to the starter turbine. Three cartridges were installed in the aircraft at a time, being behind the cockpit. However, it was not unusual for all three cartridges to fail. It was common to leave off the panel giving access to the cartridges until the engines were running, to give the ground crew the earliest possible warning of something untoward happening. Several aircraft were lost due to fires that resulted from problems on start up.

The reheat system increased the power from 11,000lb. per engine to 12,300lb. When reheat was selected, at high altitude, the fuel pump output supplied more fuel than the engines required in the “dry” (no reheat) condition and the surplus fuel was fed into the jet pipe and burnt, increasing the thrust. At low altitude, the output from the fuel pump was only slightly more than the engines required in “dry” mode. As the reheat system had priority for the fuel, this meant overall thrust was less at low altitude than at high altitude. The optimum minimum height for reheat selection was 20,000 feet.

The Aden 30mm cannons were meant to be an interim fit, although all fighter variants were fitted with four, unless equipped with Firestreak missiles, when two cannons were removed. The rate of fire was 1,200 rounds per minute, although the maximum number of rounds that could be fired in a continuous burst was 150 without the guns overheating. The guns were heated by air tapped from the engine compressor casings, and this gas was also used to remove waste gases when the cannons had been fired. The aircraft had to be within 1,000 yards of the target to engage it. This was an issue as Soviet bombers were equipped with radar-guided rear-facing cannons with a maximum effective range of 2,000 yards.

De Havilland designed and developed the missile that equipped the FAW.7-9 variants. It was codenamed “Blue Jay” and later titled Firestreak. It had an infra-red seeking guidance system. It was only capable of detecting an aircraft engine from astern and this meant intercept courses had to position the Javelin behind the enemy aircraft, with the Airborne Interception (AI) radar locking onto the target. The navigator directed the missile seeker head and could advise the pilot when to launch. Each missile had a 50 lb. high explosive warhead and the missile could be launched 10,000 feet below the target, with the distance of the Javelin from the target being between one and four miles. The missiles were fitted on highly aerodynamic pylons under the wings. The top speed of a missile-equipped Javelin was very close to that of one with no pylons.

The Javelin was described as an easy aircraft to fly, being forgiving and robust. There was a ban on looping.

Individual aircraft details (FEAF relevant details only):

First flight 1954.07.22 1956.04.25 1958.01.06 1956.02.27 1956.08.24 (prototype) 1956.11.09 1958.05.09 1959
Crew 2 2 2 2 2 2 2 2 2
Dim:L 56'03" 56'03" 59'11" 56'03" 56'03" 56'03" 56'03" 56'03" 56'09"
Dim:W 52'10" 52'10" 52'10" 52'10" 52'10" 52'10" 52'10" 52'10" 52'10"
Dim:W² 927.sqft 927.sqft 927.sqft 927.sqft 927.sqft 927.sqft 927.sqft 927.sqft 927.sqft
Dim:H 16'00" 16'00" 16'00" 16'00" 16'00" 16'00" 16'00" 16'00" 16'00"
Guns 4×30mm 4×30mm 4×30mm 4×30mm 4×30mm 4×30mm 4×30mm 4×30mm 4×30mm
Missiles // // // // // // 4×Firstreak 4×Firstreak 4×Firstreak
Engine:2 Saphire.Sa6 Saphire.Sa6 Saphire.Sa6 Saphire.Sa6 Saphire.Sa6 Saphire.Sa6 Sapphire.Sa7 Sa7R Sa7R
Power:dry 8000.lbf 8000.lbf 8000.lbf 8000.lbf 8000.lbf 8000.lbf 11000.lbf 11000.lbf 11000.lbf
Power:xtra = = = = = = = 12300.lbf 12300.lbf
Speed:SL 616.kn 616.kn 555.kn 610.kn 612.kn 612.kn 616.kn 610.kn 610.kn
Speed:Mx 0.94 0.94 0.91 0.96 0.93 0.93 0.95 0.93 0.93
Ceiling 52500.ft 52500.ft 46000.ft 50700.ft 50100.ft 50100.ft 40270.ft 52000.ft 52000.ft
Weight:MTO 36690.lb 37200.lb 42000.lb 37480.lb 39370.lb 40600.lb 40270.lb 42510.lb 43165.lb
Producton 40 30 22 50 64 33 142¹ 47 (116)¹

General Specifications

Genre     Seaplane                
Sub-Genre     Vintage                
Carrier.Capable     YES/NO                
Launch=No.catap     YES/NO -              
Propulsion:     Piston Jet Turbine Rocket          
Length     metre or Imp 0.00m              
Span     metre or Imp 0.00m              
Height     metre or Imp 0.00m              
Speed:rotation     knot:F15*1.0


Speed:takeoff     knot:F35*1.2


Speed:max     knot


Speed:cruise     knot 000.kn              
Speed:stall/F00     knot 00.kn              
Speed:stall/F15     knot 00.kn              
Speed:stall/F35     knot 00.kn              
Speed:approach     knot:F35*1.4 00.kn              
Speed:landing     knot 00.kn              
Climb.rate     feet/minute 0000.ft/m              
Ceiling     feet 0000.ft              
TakeOff.Run     metre 000.m              
LandingRun Brakes   metre 000.m              
LaindingRun Reverse   metre -              
LaindingRun Chute   metre -              
Avionics:Radar     ID                
Avionics:IRST     ID                
Avionics:Warning     ID                
Engine-1.ID     ID ID              
Engine-1.Nbr   Q Total 1              
Engine-1.Pwr.Max Military   hp or lbf 0.hp              
Engine-1.Pwr.Xtra Afterbrn   hp or lbf 0.hp              
Engine:Propeller Diam   metre or Imp 0.00m              
Engine:Propeller Blades   number 1              
Engine-1:SFC1 Mass   lbs/hr*hp 0.000              
Engine-1:SFC2 Volume   gal/hr*lbf 0.000              
Engine-1:SFC1 Mass   lbs/hr*hp -              
Engine-1:SFC2 Volume   gal/hr*lbf -              
Engine-1:Reverse     YES/NO                
IFR:boom Fixed   YES/NO                
IFR:boom Retract   YES/NO                
IFR:receptacle     YES/NO                
IFR:receptacle Doors   YES/NO                
Air.Brakes     YES/NO                
Flaps     YES/NO                
Landing.Gear     YES/NO                
Landing.Gear Retract   YES/NO                
Arresting.Hook     YES/NO                
Brake.Chute     YES/NO                
Powered.Wingfold     YES/NO                
Canopy.Opening InFlight   YES/NO                
Fire.Extinguisers Engines   YES/NO                
Bomb/Cargo.Doors     YES/NO                
Search.Light     YES/NO                
Egress.Procedure     Eject/Bail                
INTERNAL WEAPONS                    
Recce.Pack Inbuilt   YES/NO                
Guns:fwd.firing/T1 cal Q Gun.ID                
Guns:fwd.firing/T2 cal Q Gun.ID                
Guns:fwd.firing/T3 cal Q Gun.ID                
Gun.Turret:Nose cal Q Gun.ID                
Gun.Turret:Dorsal cal Q Gun.ID                
Gun.Turret:Ventral cal Q Gun.ID                
Gun.Turret:Waist cal Q Gun.ID                
Gun.Turret:Tail cal Q Gun.ID                
FFAR ID   FFAR.ID                
Fuel:Internal Std   Imp.Gal                
Fuel:Internal Extra   Imp.Gal                
WEIGHTS & LOADS                    
Weight:Empty     lb                
Crew: 200 lb/@ Q lb                
Fuel:Internal 0000.gal ×7.6 lb                
Guns:fwd.firing/T1 000.rpg Q lb                
Guns:fwd.firing/T2 000.rpg Q lb                
Guns:fwd.firing/T3 000.rpg Q lb                
Gun.Turret:Nose 000.rpg Q lb                
Gun.Turret:Dorsal 000.rpg Q lb                
Gun.Turret:Ventral 000.rpg Q lb                
Gun.Turret:Waist 000.rpg Q lb                
Gun.Turret:Tail 000.rpg Q lb                
FFAR Q Q lb                
Payload:Internal     lb                
Pylon:Wing Tip port T1                
HVAR:   port R1 R3 R5 R7                
Pylon:Wing Outer port W5                
Pylon:Wing Central port W3                
Pylon:Wing Inner port W1                
Pylon:Fuselage Outer port F3                
Pylon:Fuselage Inner port F1                
Pylon:Fuselage Central   F0                
Pylon:Fuselage Inner stb F2                
Pylon:Fuselage Outer stb F4                
Pylon:Wing Inner stb W2                
Pylon:Wing Central stb W4                
Pylon:Wing Outer stb W6                
HVAR:   stb R2 R4 R6 R8                
Pylon:Wing Tip stb T2                
Bomb/Cargo.Bay Wings port B1                
Bomb/Cargo.Bay Fusel fwd BF                
Bomb/Cargo.Bay Fusel ctrl BC                
Bomb/Cargo.Bay Fusel aft BA                
Bomb/Cargo.Bay Wings stb B2                
Passengers 260 lb/@ Q lb                
Weight:Total     lb                
Weight:MTOW     lb - - - - - - - -
SPECIAL LOADS                    
Weight:Empty     lb                

PBM-5S 2253 gal fuel capacity is based on BuAer drawings showing 2702 US gal (+   786 US gal in bomb bay cells).
P5M2    2342 gal fuel capacity is based on BuAer drawings showing 2809 US gal (+ 1160 US gal in bomb bay cells)
SFC is then based upon these factors.  Cruise power and fuel weight ratios are AAC's standard (see: Measurements)

PBM5   : 2100hp × 2 × 66% × 0.34lb/hp/hr × [2362Nm÷130Kn=18.1669 hr] = 17122 lb ÷7.6lb/gal = 2253 gal (revised)

P5M2   : 3400hp × 2 × 66% × 0.29lb/hp/hr × [2070Nm÷151Kn=13.6755 hr] = 17799 lb ÷7.6lb/gal = 2342 gal (revised)

P-40E 281 rounds per gun
P-51B&C 280 outboard 350 inboard guns
P-51D 400 inboard and 270 middle and outboard guns
P-47D 260 to 425

F6F-3 400 RPG
F4U 390 RPG

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