Technical Data | The Skyhawk Association (2024)

Body

This page is dedicated to
Mr. Robert O. Rahn

Please read about him below.

Original R.G. SmithSkyhawk Concept Blueprint

R.G. Smith A4D-1 Sketch

Breakdown/Remating an A-4

Example of a some A-4 Misc. Parts List.

Variant differences by Gabby

VariantA4D-1
A-4A
A4D-2
A-4B
Carlos A. Garcia
A4D-2N
A-4C
4LA4D-5
A-4E
A-4FA-4M Drwg1
A-4M Drwg2
TA-4FTA-4J
Length39'4"39'4"40'1"40'1"41'3"41'3"41'3"43'7"43'7"
Wing Span27'6"27'6"27'6"27'6"27'6"27'6"27'6"27'6"27'6"
Main Lndg Gr Width7'9.5"7'9.5"7'9.5"7'9.5"7'9.5"7'9.5"7'9.5"7'9.5"7'9.5"
Empty weight (lbs)8,4009,1469,7289,7289,85310,44810,46510,602
EngineCurtiss-Wright J65-W-16ACurtiss-Wright J65-W-16ACurtiss-Wright J65-W-16AWright J65-W-20Pratt Whitney J52-P6APratt Whitney J52-P8A/8BPratt Whitney J52-P408Pratt Whitney J52-P8A/8BPratt Whitney J52-P6A
Static Thrust (lbs)7,7007,7007,7008,4008,5009,30011,2009,3008,500
Engine Upgrade (some)NoneJ65-W-20J65-W-20J52-P-8A, 8BJ52-P-408NoneJ52-P-8A, 8BNone
IntakesFlushFlushFlushFlushSeparatedSeparatedSeparatedSeparatedSeparated
Max level mph664661649649673673673675
ElevatorBoostedPoweredPoweredPoweredPoweredPoweredPoweredPoweredPowered
Extendable Control StickYesYesNoNoNoNoNoNoNo
Nose Wheel SteeringNoNoNoNoNoYesYesYesYes
Drag ChuteNoNoNoNoNoNoYesNoNo
Internal Fuel (gal)810810810810810810670670
Wing Fuel Sensors226666666
Refueling ProbeNoYesYesYesYesyesyesYesYes
Stabilizer Trim (degrees)12up,1dwn11up,1dwn11up,1dwn11up,1dwn12.25up,1dwn12.25up,1dwn12.25up,1dwn12.25up,1dwn11up,1dwn
SpoilersNoNoNoYesNo,(AFC442)YesYesYesYes
Ext. Stations333555553
JATONoNoSome Provisions OnlyPartial ProvisionsSome Provisions OnlyPartial ProvisionsComplete ProvisionsPartial ProvisionsSome Provisions Only
Oxygen5 Litre5 Litre10 Litre10 Litre10 Litre10 Litre10 Litre10 Litre10 Litre

Fuselage

Fuselage fuel tank was directly behind the cockpit, and utilized one fuel gauge sensor in all variants. This tank was smaller in the two seat variants. Pilots referred to this fuel tank as "The Bag" as it was bladder type.

In the A-4A, the aileron was powered by a single system. All subsequent models the aileron was tandem powered.
The Control Stick Grip Functions.

AOA Pic1 Pic2 Pic3 Pic4

AFC 442 incl Spoilers
Technical Data | The Skyhawk Association (1)

TAIL PIPE Variations

Tail Pipe Extension (Israel)
Technical Data | The Skyhawk Association (2)

Skyhawk Hydraulics System

Skyhawk Electrical System

Engine Start Capabilities

All US Skyhawks with the exception of the A-4M required an external start cart in order to start the engine. Some of the earliest models also were required to carry a starter probe in the rear "hell hole" which was a gear mechanism that was placed in the right wing root in order to turn the engine before adding fuel and then re-stowed after start. The A-4M had its own starter along with a very small pump handle that had to be attached to the JFS (Jet Fuel Starter) and hand pumped whenever the start was not successful on the first attempt.

1961 Flying Ubangis Skyhawk BuNo 142719, AB-402, is manned and ready to go as the line division clears the area of starter probes and the boarding ladder.

BuNo142085 at NAF China Lake with a good view of the starter probe installed in the right wing root.

13MAR63: China Lake Skyhawk BuNo 147680 and Shrike test pilot LCDR Jack Sickel. Navy photo from J.A. Sickel Jr. Starter probe installed and connected to a turbine starter.

CVA-19 South China Sea, NF-402 gets a start from a flight deck "Huffer", using a starter probe.

Flight deck "Huffer" starts BuNo 150062, VA-155 NL-502, a A-4E with no starter probe -1967-68. .

The A-4A, B, C utilized the starter probe. Starting with the A-4E model the probe was no longer necessary, and the ground unit provided compressed air hose was connected directly to the a/c. There were several types of units that provided compressed air for starting a/c. One, the "Mobile Gas Turbine Compressor (GTC) was shaped like an a/c drop tank and could be carried on the centerline or inboard wing store racks of the Skyhawk. If carried on the centerline carrier landings were permitted. If carried on the inboard wing stations, carrier landings were not permitted. Thus a Skyhawk could carry a GTC along to another air station to provide compressed air for starting the engine.

Technical Data | The Skyhawk Association (3)
Technical Data | The Skyhawk Association (4)
Technical Data | The Skyhawk Association (5)
Yellow Gear

RNZAF Official photos via Don Simms.

RNZAF N2 (nitrogen gas) rig next to fuel tank vent trolley.

Sprauge Hydraulic Servicing Rig, operators side.

Egress Systems [Early seats = Cartridge Seat, RAPEC]
A-4A,B,C,E = Escapac 1, 1A-1;
A-4F, TA-4F = Escapac IC-3; IF-3, IG-3

Attachments

External Plyons:
Centerline Aero 7A (suspension= 14 and 30 inch)
Centerline w LB-18A Camera POD
Wings Aero 20A (suspension= 14 inch)
A-4E and A-4F reworked per AFC 546 and AAC-614 had a modified centerline plyon with the LB-18A Camera Pod. This pod contained either a DBM-4A 16mm Motion Camera or a KB-10A Still Camera

Maximum External Load Capacities:
Fuselage Centerline Station (all models) = 3,500 lbs
2 Inboard Wing Stations (all models) = 2,200 lbs (ea.)
2 Outboard Wing Stations (all except A/B/C/P/Q) = 1,000 lbs (ea.)

External Fuel Tanks: (Useable)
150gal Aero 1C Drop Tank - 147gal
300gal Aero 1D Drop Tank - 295gal (P/N 22548000?)
Centerline 400gal Drop Tank - 396gal

The Buddy Store Technical Data | The Skyhawk Association (6) Pioneered by Douglas and the A-4 Skyhawk, the air refueling system enables the carrying aircraft to serve as a tanker for other aircraft. All fuel in the Skyhawk tanker aircraft, except the fuselage tank, may be transferred to the receiver aircraft.
The refueling store (Buddy Store) carried on the center-line rack contains a 300 gallon fuel cell, a constant speed ram air turbine-driven hydraulic pump, a hydraulically driven fuel pump, a hydraulically operated hose reel, and 50 feet of refueling hose with a droque.
The store is capable of transferring fuel at aprox. 180 gallons per minute. Provisions are made for dumping fuel when necessary. The operational envelope of the store with the droque extended is limited to 300KIAS or .8 MACH, which ever is lower up to 35,000 feet.
The air turbine that powers the 700-pound in-flight re-fueling package will be able to transfer about 6000 pounds of fuel from the center-line and wing tanks, as well as part of the internal load of 5400 pounds in the wings and fuselage. The tanker will weigh about 23,700 pounds on the catapult. When it reaches the bow, its speed will be about 150 knots (173 mph). It was SOP (standard operating procedure) to launch one tanker in each launch-recovery cycle. In combat, the air wing would launch two or three Skyhawk tankers if several divisions of aircraft were attacking well-defended targets. During the years that the Skyhawk tanker was operational, its pilots prevented innumerable aircraft losses due to fuel exhaustion. The most common causes of "low-state" were additional approaches needed for safe landings on a pitching deck, delay for clearing a crash on deck, using extra fuel in evading SAMs and MIGs, and fuel loss from battle damage. 1968: Hornets Skyhawk BuNo 142105 refueling an RA-3B Skywarrior. U.S. Navy by PH2 Don K-Sieburg, Jr.

Technical Data | The Skyhawk Association (7)

Technical Data | The Skyhawk Association (8)

Technical Data | The Skyhawk Association (9)

Center-line "Buddy Store" (re-fueling pod)

Wing station with an External Baggage Container, CNU-188/A (Blivet)

Technical Data | The Skyhawk Association (11)
This photo shows a PPCP (Pilot's Personal Cargo Pod) being studied for a Weather Survey Pod.
Technical Data | The Skyhawk Association (12)
The A4 in the 7X10 foot transonic wind tunnel at the David W Taylor Model Basin in Carderock, MD circa 1961-64. Above picture, I believe, is with a Walleye. Donald Henry

Variant Avionics Comparison

VariantA-4AA-4BA-4CA-4LA-4EA-4FA-4MTA-4FTA-4J
Upper Avionics BayNoNoNoYesYesYesYesNoNo
AFCSNoNoYesYesYesYesYesYesYes
RadarNoNoAN/APG-53AAN/APG-53AAN/APG-53AAN/APG-53AAN/APG-53A,
Provisions Only
AN/APG-53A
Video IP-936/AXQNoNoNoSomeProvisions OnlyProvisions OnlyProvisions OnlyNoProvisions Only
Comm GearRT-355/
ASQ-17
(AN/ARC-27A)
RT-355/
ASQ-17
(AN/ARC-27A)
RT-355/
ASQ-17
(AN/ARC-27A)
RT-355/
ASQ-17
(AN/ARC-27A)
AN/ARC-51A
AN/ARR-69
AN/ARC-51A
AN/ARR-69
AN/ARC-51A
AN/ARR-69
AN/ARR-114 (VHF-FM)
AN/ARC-51A
AN/ARR-69
AN/ARC-51A
AN/ARR-69
Nav CmptrNoneAN/ASN-19AAN/ASN-19AAN/ASN41AN/ASN-19A/AN/ASN41AN/ASN41Provisions OnlyProvisions OnlyAN/ASN-19A
IFFRT-354/
(AN/APX-6B)ASQ-17
RT-354/
(AN/APX-6B)ASQ-17
RT-354/
(AN/APX-6B)ASQ-17
AN/APX-64(VRT-354/
(AN/APX-6B)ASQ-17
AN/APX-64(V)AN/APX-72(V)AN/APX-64(V)
AN/APX-72
APC AN/ASN-54NoNoYesProvisions OnlyYesYesProvisions OnlyProvisions OnlyYes
Doppler AN/APN-153NoNoNoYesSomeYesProvisions OnlyProvisions OnlyNo
TACANAN/ARN-21DNoNoYesSomeYesProvisions OnlyProvisions OnlyNo
RADAR AltimeterNoAN APN-141AN APN-141AN APN-141AN APN-141AN APN-141AN APN-141 AN APN-194AN APN-141AN APN-141
AIMSNoNoAFC-482Partial ProvisionsAFC-482Partial ProvisionsProvisions OnlyPartial ProvisionsAFC-482
ECMNoNoProvisions OnlySomeProvisions OnlyProvisions OnlyProvisions OnlyNoProvisions Only

Skyhawk Avionics

A-4M BuNo 158182 Nose Hardware

Technical Data | The Skyhawk Association (13)

10AUG77:

Close-up ARBS on China Lake Skyhawk BuNo 159485.

Technical Data | The Skyhawk Association (14)

Variant Weapons Delivery Capability

Technical Data | The Skyhawk Association (15)
If You Aint Ordnance You Aint ----!

Skyhawk Ordnance Page

Technical Data | The Skyhawk Association (16)
Baumbeck doing Gun Pod Repair
Technical Data | The Skyhawk Association (17)
VariantA-4AA-4BA-4CA-4LA-4EA-4FA-4MTA-4FTA-4J
Guns20MM 200rds20MM 200rds20MM 200rds20MM 200rds20MM 200rds20MM 200rds20MM 400rds20MM 200rds20MM 200rds
Ext. Stations333555553
LABSAERO 18BAERO 18BAN/AJB-3AN/AJB-3AAN/AJB-3A / 3AAN/AJB-3AAN/AJB-3AProvisions OnlyAN/AJB-3A
CP-741/ANoNoNoYesYesYesYesProvisions OnlyYes
Special WeaponsYesYesYesYesYesYesYesYesYes
SidewinderNoNoSome
AFC-203A
NoNoTwo Stations
AFC
NoNoSome
AFC-203A
BullpupNoProvisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyNoProvisions Only
GCBSNoSome Provisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyYesNoProvisions Only
ShrikeNoNoLimitedYesYesYesYesProvisions OnlyYes
WalleyeNoNoNoSome Provisions OnlyProvisions OnlyProvisions OnlyProvisions OnlyNoProvisions Only
Technical Data | The Skyhawk Association (18)

1965: VA-64 Black Lancers A-4C Skyhawk (BuNo unknown), AE-608, and VA-66 Waldos A-4C Skyhawk (BuNo unknown), AE-503, in the background as Ordies move an iron bomb across the deck of the USS America somewhere in the Med. USS America CVA-66 Cruise Book photo from Jack R. Hansen.
Good shot of one of the America's bomb elevators. From the flight deck down to the 2nd deck, one deck below the hangar deck. At the 2nd deck, the ordnance is transferred from a second elevator that runs from the 2nd deck to the ordnance storage areas several decks below. Thus no direct path from the flight deck to the ordnance storage areas, in case of of fire and/or explosions.

Non-Domestic Variants

Arg. A-4P (B)Arg A-4CArg. Navy A-4Q (B)A-4AR (M)A-4KU (M)A-4G (F)A-4K (F)
A-4H (E)A-4H (F)A-4PTM (B)A-4S (B)A-4PTM (C)A-4S (C)AF-1
OA-4AR (TA-4F)TA-4GTA-4HTA-4KTA-4KUTA-4PTMAF-1A
This Skyhawk webpage is dedicated to
Douglas Test Pilot Robert O. Rahn,
the first pilot to fly the A-4 Skyhawk, the Ferrari of airplanes.
Technical Data | The Skyhawk Association (19)
Test pilot Bob Rahn is pictured in the first A-4, XA4D-1 BuNo. 137812 shortly after the first Skyhawk flight.
June 22, 1954.
(Harry Gann photo)

Robert O. Rahn, first pilot to fly the Douglas A-4 Skyhawk, passed away at age 77 on Thursday, May 21, 1998, a victim of ALS (Lou Gehrig disease).

Around the Douglas Aircraft Company flight test department, Bob had the reputation as being "a cool and thorough pilot." There were several instances in the flight test programs of the AD Skyraider, the F4D Skyray, and the A4D Skyhawk where his unflappable demeanor during test flight emergencies literally saved the programs. Bob also participated in the F3D Skyknight and F5D Skylancer flight test programs.

Born in Harvey, Illinois, on December 29, 1920, Bob attended the University of Cincinnati, intending to earn a degree in Aeronautical Engineering. While there, he learned to fly in the Civilian Pilot Training Program and, in early 1941, he enlisted in the United States Army Air Corps and entered flight training. After graduating, he became a member of the first United States fighter group to deploy to England, where he flew the Spitfire with the 309 Fighter Squadron.

After completing his overseas tour, Rahn returned to the U.S. and wrangled an assignment to Wright Field to attend the United States Air Force Test Pilots School. With World War II all but over, in August 1945 Bob accepted employment as a test pilot at Douglas Aircraft Company, where he subsequently made first flights in 18 different aircraft between 1946 and 1956. In 1957 he joined the Rockwell Company as an Apollo Space Capsule simulator research pilot. Rahn retired from the aircraft industry in 1984 to devote much of his time to skiing and flying his Navion aircraft in speed enhancement and point to point flight competition with other Navion owners.

Among the group of World War II pilots who bridged the gap between the "seat-of-the-pants" pilots and the engineer-scientist aviators that now conduct aircraft flight tests, Bob Rahn accumulated many honors in his flying career. He was inducted into the Navy Test Pilots Hall of Honor, set a world speed record in the Douglas F4D Skyray, served as a founding member of the Society of Experimental Test Pilots, was a charter member of the Aviation Hall of Fame, and an original member of the Skyhawk Association.

Bob Rahn was characterized as "a pilot who knew what was going on, able to tell the engineers what the problems were in their own terms."

Technical Data | The Skyhawk Association (2024)
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