Republic F-105 Thunderchief: Aircraft profile

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The Republic F-105 Thunderchief, was a supersonic fighter-bomber used by the United States Air Force.

Republic F-105 Thunderchief: Republic F-105D-30-RE (S/N 62-4234) in flight with full bomb load. USAF photo.Republic F-105 Thunderchief: Republic F-105D-30-RE (S/N 62-4234) in flight with full bomb load. USAF photo.

In 1951 Republic Aviation began a project to develop a supersonic tactical fighter-bomber to replace the F-84F. The result was the F-105 Thunderchief, later affectionately nicknamed the "Thud." The prototype YF-105A first flew in October 1955, but the first F-105D did not fly until June 1959. A total of 833 Thunderchiefs of all types were built, including 610 F-105Ds.

The U.S. Air Force sent F-105s to Southeast Asia shortly after the Tonkin Gulf incident in the summer of 1964. The USAF operated the F-105D extensively in the air campaign against North Vietnam called Rolling Thunder. Although designed as a nuclear strike aircraft, the F-105 could carry a total of over 12,000 pounds of conventional ordnance -- a heavier bomb load than a World War II B-17. The F-105 was gradually replaced by the F-4 Phantom, and the USAF withdrew the last F-105D from service in July 1980.

Technical notes:

Armament: One M61 Vulcan 20mm cannon and more than 12,000 lbs. of ordnance

Engine: One Pratt & Whitney J75-P-19W of 24,500 lbs thrust

Maximum speed: 1,390 mph

Cruising speed: 778 mph

Range: 2,206 miles

Ceiling: 51,000 ft.

Span: 34 ft. 11 in.

Length: 64 ft. 5 in.

Height: 19 ft. 8 in.

Weight: 52,838 lbs. maximum

Source: US Air Force

Republic F-105 Thunderchief: Three aircraft formation of F-105D-6-RE (S/N 59-1770), F-105D-5-RE (S/N 59-1750) and F-105D-6-RE (S/N 60-0409). (U.S. Air Force photo)Republic F-105 Thunderchief: Three aircraft formation of F-105D-6-RE (S/N 59-1770), F-105D-5-RE (S/N 59-1750) and F-105D-6-RE (S/N 60-0409). (U.S. Air Force photo)

Detailed background:

Source: wikipedia.org

The Republic F-105 Thunderchief, was a supersonic fighter-bomber used by the United States Air Force. The Mach 2 capable F-105 bore the brunt of strike bombing over North Vietnam during the early years of the Vietnam War. Originally designed and deployed as a single seat aircraft, a two-seat Wild Weasel version was later developed for use in the specialized Suppression of Enemy Air Defenses(SEAD) role against surface-to-air missile sites. It was commonly known as the "Thud" by its crews.

As a follow-on to the Mach 1 capable F-100, the F-105 was also armed with missiles and a cannon; however, its design was tailored to high-speed low-altitude penetration carrying a single nuclear bomb internally. First flown in 1955, the Thunderchief entered service in 1958. As the largest single-engined fighter ever employed by the USAF, the single-seat F-105 would be adapted to deliver a greater iron bomb load than the four-engined, 10-man strategic bombers of World War II like the B-17, B-24 and B-29. The F-105 would be best remembered as the primary strike bomber over North Vietnam in the early stages of the Vietnam War. Over 20,000 Thunderchief sorties were flown, with 382 aircraft lost (nearly half of the 833 produced) including 62 operational casualties. Although it lacked the agility of the smaller MiG fighters, USAF F-105s demonstrated the effectiveness of guns, and were credited with downing 27.5 enemy aircraft.

Republic F-105 Thunderchief: DAYTON, Ohio -- Republic F-105D cockpit at the National Museum of the United States Air Force. (U.S. Air Force photo)Republic F-105 Thunderchief: DAYTON, Ohio -- Republic F-105D cockpit at the National Museum of the United States Air Force. (U.S. Air Force photo)

During the war, the two-seat F-105F and F-105G Wild Weasel variants became the first dedicated Suppression of Enemy Air Defenses (SEAD) platforms, fighting against the Soviet-built S-75 Dvina / (SA-2 Guideline) surface-to-air missiles. Two Wild Weasel pilots earned the Medal of Honor attacking missile sites, with one shooting down two MiG-17s the same day. The dangerous missions often required them to be the "first in, last out," suppressing enemy air defenses and keeping them suppressed while strike aircraft accomplished their missions and then left the area.

Although the F-105 weighed 50,000 pounds (22,680 kg), the aircraft could exceed the speed of sound at sea level and Mach 2 at high altitude. It could carry up to 14,000 pounds (6,700 kg) of bombs and missiles. The Thunderchief was later replaced as a strike aircraft over North Vietnam by both the F-4 Phantom II and the swing-wing F-111. However, the "Wild Weasel" variants remained in service until 1984, when they were replaced by a specialized F-4G "Wild Weasel V". The USAF F-4G was subsequently replaced by the F-16CJ aircraft currently employed in the SEAD role.

Development

Republic Aviation started the Thunderchief as an internal project to replace the F-84F Thunderflash. The design team led by Alexander Kartveli examined some 108 configurations before settling on a large, single-engine AP-63FBX (Advanced Project 63 Fighter Bomber, Experimental) - AP-63-31 actual. The new aircraft was intended primarily for supersonic, low altitude penetration into the Soviet Union on a hi-lo-hi mission and delivery of a single, internally carried nuclear bomb. Thus, with emphasis placed on low-altitude speed and flight characteristics, range and payload, the aircraft would be fitted with a large engine, and a relatively small wing with a high wing loading which would give a stable ride at low altitudes, and less drag at supersonic speeds.

Traditional fighter attributes such as maneuverability were a secondary consideration. Enthusiastic at first, the United States Air Force awarded Republic with a contract for 199 aircraft in September 1952. However, by March 1953 the USAF had reduced the order to 37 fighter-bombers and 9 tactical reconnaissance aircraft, citing the approaching end of the Korean War. By the time the F-105 mock-up had been completed in October 1953, the aircraft had grown so large that the Allison J71 turbojet intended for it was abandoned in favor of an even more powerful Pratt & Whitney J75. Anticipating protracted development of the engine, it was expected that the first aircraft would use the smaller Pratt & Whitney J57. On 28 June 1954, the USAF officially ordered 15 F-105As under the Weapon System designation WS-306A.

The YF-105A prototype first flew on 22 October 1955, with the second YF-105A following on 28 January 1956. In spite of being powered by a less potent J57-P-25 engine with 15,000 pound-force (66.7 kN) of afterburning thrust (the J75 was expected to generate 24,500 pound-force (109.0 kN) with the afterburner), the first prototype attained the speed of Mach 1.2 on its maiden flight. Both prototypes featured conventional wing root air intakes and slab-sided fuselages typical of the early jets. However, insufficient power and aerodynamic problems with transonic drag, as well as Convair's experience with their F-102 Delta Dagger, led to a redesign of the fuselage in order to conform to the Area rule, giving it a characteristic "wasp waist". In combination with the distinctive forward-swept variable-geometry air intakes which regulated airflow to the engine at supersonic speeds and the J75 engine, this enabled the resulting F-105B to attain Mach 2.15.

In March 1956, the USAF replaced its F-105A order with that for 65 F-105B. This model added the MA-8 fire control system with an AN/APG-31 ranging radar, and K-19 gunsight which allowed toss-bombing. The first pre-production YF-105B flew on 26 May 1956, and on 19 June, the aircraft was officially named Thunderchief, continuing the Republic Aviation's nomenclature sequence of P-47 Thunderbolt, F-84 Thunderjet, and F-84F Thunderstreak/RF-84 Thunderflash. The first production F-105B flew on 14 May 1957.

The F-105 was a mid-wing monoplane with a 45 degree swept wing and tail surfaces. The single engine was fed by two intakes in the wing roots, leaving the nose free for a radome housing the multi-mode radar. At the time, the F-105 was the largest single-seat combat aircraft ever built. Its capacious fuselage provided room for 1,160 US gallons (4,460 L) of fuel and a bomb bay measuring 15 feet 10 inches by 32 inches by 32 inches (4.82 m x 0.81 m x 0.81 m), originally intended for a single nuclear weapon but typically containing an additional 390 US gallon (1,500 L) fuel tank. Two underwing and one fuselage wet-stores-capable pylons were provided for 450 and 650 US gallon (1,730 L and 2,500 L) expendable fuel tanks. Two outboard (dry) stations were wired for missiles or bombs. A single T-171E3 20 millimeter Gatling cannon was installed in the left side of the nose with a magazine for 1,028 rounds of ammunition, combined with a radar ranging gunsight in B and D models. The aircraft was designed to carry the short-range Sidewinder but it would not be equipped with the medium-range radar-guided missiles.

On 11 December 1959, an F-105B piloted by Brig Gen Joseph Moore (commander of the 4th Tactical Fighter Wing) set a world record of 1,216.48 mph (1,958.53 km/h) over a 100 kilometer (62 mi) circuit. Moore received the Bendix Trophy in 1959 for this feat.

Plans to build over 1,500 F-105Ds were cut short when the Secretary of Defense Robert McNamara decided to equip no more than seven combat wings with the type. Production was cut in favor of the Air Force adopting the Navy's F-4 Phantom II. A total of 833 F-105s were produced before production ended in 1964.

Republic F-105 Thunderchief: Republic F-105B in-flight refueling. (U.S. Air Force photo)Republic F-105 Thunderchief: Republic F-105B in-flight refueling. (U.S. Air Force photo)

Design

The F-105 was designed primarily for low-level interdiction and its low-altitude speed was its greatest asset when dealing with Soviet Mikoyan-Gurevich MiG-17 and Mikoyan-Gurevich MiG-21 fighters. The Thunderchief's highly loaded wing was excellent for speed and smooth ride but not for sustained turns in a dogfight. Nevertheless, the F-105 managed 27.5 officially credited air-to-air victories against North Vietnamese aircraft at the cost of 17 aircraft lost to enemy fighters (North Vietnamese pilots claimed to have shot down an additional 23 F-105s but none have been confirmed by USAF). All victories were against MiG-17s -- 24.5 were shot down with cannon fire (one victory was shared with an F-4), and three with AIM-9 Sidewinder missiles. F-4 Phantoms were tasked to protect the Thuds from MiG fighters, but they lacked the internal gun and ranging gunsight of the Thunderchief until late in the war.

On the basis of combat experience, the F-105D was updated with a better ejection seat, radar homing and warning (RHAW) antenna on the tail fin, additional armor, and protection to the hydraulic system which proved to be very vulnerable to combat damage. The hot and humid climate of Southeast Asia created problems for the capricious electronics, a problem encountered by virtually all advanced US aircraft of the war. High ambient temperatures also exacerbated the F-105's propensity for engine fires due to inadequate cooling of the afterburner. Most of the Vietnam aircraft were eventually fitted with ram-air scoops to ameliorate this problem.

Unfortunately, the low-altitude attacks and dive bombing brought the F-105s into the range of North Vietnamese anti-aircraft fire; the loss rates were so high that the USAF began experiencing shortages of combat-ready aircraft. A total of 382 aircraft were lost in Southeast Asia, 320 of those in combat. The vast majority of losses were the result of enemy ground fire. Of the 610 single-seat F-105Ds built, 283 were shot down and 52 lost operationally. Of the 143 F-105F/G two-seaters, 37 were shot down and ten lost operationally (one "Ryan's Raiders" night interdiction aircraft and one Combat Martin jammer without a back-seat WSO were lost in combat, the other 45 losses were Wild Weasel aircraft).

Special modifications

The rear cockpits of several two-seat F-105Fs were modified under project Commando Nail with an R-14A radar and a radar scope that offered high resolution. These aircraft were used for all-weather and night low-level strikes against especially dangerous targets by a unit from the 13th Tactical Fighter Squadron dubbed "Ryan's Raiders" starting in April 1967. Commando Nail aircraft were also used to develop tactics for proposed B-58 Hustler bomber missions in Vietnam, although the Hustler was never deployed to Southeast Asia. Some of these aircraft were later converted to the Wild Weasel III standard.

Republic F-105 Thunderchief: Republic F-105D-6-RE (S/N 58-1762) refueling probe detail. The -D model had two types of in-flight refueling equipment: a probe (for the drogue) and a receptacle (for the boom). (U.S. Air Force photo)Republic F-105 Thunderchief: Republic F-105D-6-RE (S/N 58-1762) refueling probe detail. The -D model had two types of in-flight refueling equipment: a probe (for the drogue) and a receptacle (for the boom). (U.S. Air Force photo)

In an effort to thwart MiG attacks, several F-105Fs were also fitted with Hallicrafters QRC-128 VHF jammers under project Combat Martin. The North Vietnamese interceptor force followed Soviet air-defense doctrine, with pilots under rigid direction of ground controllers over radio links. The QRC-128, nicknamed "Colonel Computer," filled up the rear cockpit of the F-105F and bounced voice communications over the radio channel back out after a delay, resulting in an obnoxious garble. However, the first time the Combat Martin was used, the US National Security Agency (NSA), in charge of US strategic signals intelligence, ordered the Air Force to cease and desist immediately, since the NSA believed that the intelligence obtained by monitoring the channels outweighed the benefits of jamming them. Some of these aircraft were eventually brought to the Wild Weasel III standard.

Persistent problems with the AN/ARN-85 LORAN system resulted in 30 F-105Ds being upgraded to the AN/ARN-92 in a long dorsal spine. Known as Thunderstick II aircraft, these F-105s could achieve a bombing circular error probable of 50 feet (15 m) from an altitude of 15,000 feet (4,570 m). Although the first of these aircraft flew in 1969, they were never deployed to Vietnam.

Wild Weasel

In 1965, the USAF began operating two-seat F-100F Super Sabres specially equipped for Suppression of Enemy Air Defenses mission in Vietnam. Nicknamed the Wild Weasel, these aircraft achieved 9 confirmed victories against North Vietnamese surface-to-air missile radars. The second crew member was a Navigator trained as an Electronic Warfare Officer (EWO), nicknamed the Bear (as in trained bear), whose job was to decipher the information from the aircraft's sensors and guide the pilot towards the targets. However, the F-100F was an interim solution and because of its limited payload it usually had to rely on accompanying strike aircraft to actually attack the SAM sites. It also lacked the speed and the endurance to effectively protect the USAF's primary strike fighter — the F-105. With twice the payload capacity of the Super Sabre and considerably better performance, the two-seat F-105F was an ideal candidate for a more definitive SEAD platform.

Republic F-105F with armament layout in August 1964. Armament includes 20 mm cannon rounds, 2.75 in. rockets, Bullpup and Sidewinder missiles, general purpose bomb, cluster bombs, LAU-3A Launchers, flare and chaff dispensers and drop tanks.

The resulting EF-105F Wild Weasel III (the EF designation was popularly used but unofficial) supplemented its sensors and electronic jamming equipment with AGM-45 Shrike anti-radiation missiles and conventional bombs, giving it an offensive capability lacking in the F-100F. The first of these aircraft flew on 15 January 1966 and they began arriving in Southeast Asia in June, with five assigned to the 13th TFS at Korat RTAFB and six more to the 354th TFS at Takhli RTAFB. In a typical early mission, a single EF-105F would accompany one or two flights of F-105Ds to provide protection from enemy ground fire. While this strategy was effective in reducing F-105D losses, the Weasel aircraft suffered heavy casualties with five of the first 11 lost in July and August 1966. Attacks into high-risk environments saw the Weasels operating in "Iron Hand" Hunter-Killer flights of mixed single-seat and two-seat Thunderchiefs, suppressing sites during attacks by the strike force and attacking others during ingress and egress.

The EF-105Fs were upgraded to the definitive Wild Weasel Thunderchief, the F-105G, with the first aircraft arriving in Southeast Asia in late 1967. The genesis of the F-105G was a PACAF policy that all USAF fighter-bombers operating over North Vietnam had to carry ECM pods, which served to degrade the Weasel's own electronics and occupied one ordnance wing hardpoint. The F-105G incorporated a considerable amount of new SEAD-specific avionics, including an upgraded RHAW system which required a redesign of the wingtips. To free outboard hardpoints for additional weapons, the Westinghouse AN/ALQ-105 electronic countermeasures were permanently installed in two long blisters on the underside of the fuselage. Thirty aircraft were fitted with specially designed pylons to permit carrying of the AGM-78 Standard anti-radiation missile, a considerable improvement over the somewhat lackluster Shrike. On a typical mission, the F-105G carried two Shrikes on outboard pylons, a single Standard on an inboard pylon balanced by a 450 US gallon fuel tank on the other side, and a 650 US gallon centerline fuel tank. The Wild Weasel aircraft were usually the first to arrive in the target area and the last to leave, staying after the strike to support rescue of downed aircrews. As such, fuel was a precious commodity and it was not uncommon for a Wild Weasel to require a 30-minute leave for aerial refueling in order to continue its mission.

Although the F-105D was withdrawn from Vietnam in 1970, the Wild Weasel aircraft soldiered on until the end of the war. They were gradually replaced by the F-4G Wild Weasel IV variant of the F-4 Phantom II. F-105B/D/F/Gs served with the Air Force Reserve and the Air National Guard units until the mid-1980s. The last Air National Guard unit was the 116th Tactical Fighter Group of the Georgia Air National Guard, flying the F-105G through 1983. The last Air Force Reserve unit, and the last USAF operator of the Thunderchief, was the 419th Tactical Fighter Wing which flew the F-105B/D/F through 1984.

Flying the F-105

The initial reaction of the fighter pilot community to their new aircraft was lukewarm. Between its massive dimensions and troubled early service life, the F-105 had garnered a number of uncomplimentary nicknames. In addition to the aforementioned "Thud", F-105's nicknames included the "Squat Bomber," "Lead Sled," and the "Hyper Hog" and/or "Ultra Hog." With time, however, the F-105's responsive controls, excellent performance at high speed and low altitude, and sophisticated electronics won over even some of the F-104 Starfighter pilots. The "Thud" changed to a term of respect and endearment to the point where the F-84F Thunderflash became known as the "Thud's Mother."

Former F-86 Sabre pilot Jerry Noel Hoblit recalled the awe of the F-105's size after seeing it in person for the first time; he could not manage to reach the air intake lip even with a running jump. The F-105 had a spacious cockpit with a good layout (particularly after introduction of "tape" instruments) and visibility (except to the rear), and the advanced electronics were easy to learn and operate. With high wing loading, the Thunderchief was by all accounts an excellent aircraft to fly at high speeds. Takeoffs and landings were often performed in the 230 mph (370 km/h) range. The spoilers provided good roll control at all speeds and the distinctive four-petal airbrakes (which also opened slightly when the afterburner was engaged to allow for the larger flow of exhaust gases) were highly effective even at supersonic speeds. Loss of control due to a spin or complications of adverse yaw required deliberate effort from the pilot and spontaneous spin recovery was rapid.

Operational history

The F-105B entered USAF service with the Tactical Air Command's 335th Tactical Fighter Squadron on 27 May 1958. Typical of advanced aircraft, early F-105 service life was plagued by problems with avionics and the MA-8 fire-control system, with the aircraft requiring some 150 hours of maintenance for each hour of flying time. Most of the problems were addressed under Project Optimize. The lack of spares resulted in the entire F-105B fleet being briefly grounded in 1960. Nevertheless, the Thunderchief became the first aircraft in USAF history to complete its first operational year without a single major accident.

By 1964, the F-105B was relegated to Air National Guard squadrons. It was replaced in frontline service by the definitive F-105D whose advanced NASARR R-14A radar and AN/ASG-19 Thunderstick fire-control system gave it all-weather performance. The R-14A radar also added a terrain guidance capability. The F-105D entered service with 335th TFS in 1960. Designed for a European conflict with the Soviet Union, the F-105D saw considerable deployment in West Germany to provide NATO with tactical nuclear strike capability, and in Japan. Like the F-105B, the F-105D's early career was plagued with maintenance problems and in-flight failures. The origins of the nickname Thud were obscure — some claim that it stood for the sound of an F-105 crashing into the ground. Another theory is that the name was in reference to the detonation of bombs during a "mud-moving" sortie. The entire F-105D fleet was grounded in December 1961 and then again in June 1962. Many of the issues were worked out during the production run and by 1964, early F-105Ds were upgraded with these fixes under project Look Alike, although engine failures and fuel system problems persisted until 1967.

Meanwhile, the USAF was gradually changing the anticipated F-105 mission from nuclear interdiction to conventional bombing. The Look Alike upgrades increased the aircraft's capacity from four to 16 conventional 750 pound (340 kg) bombs on underwing and fuselage centerline hardpoints and added the equipment to launch AGM-12 Bullpup air-to-ground missiles. In June 1961, an F-105D delivered 7 tons (15,430 lb) of conventional bombs during a USAF test — at the time a record for a single-engine airplane and a payload three times heavier than World War II's four-engined heavy bombers such as the B-17 Flying Fortress and the B-24 Liberator, though aerial refueling would be required for long missions. In fact, one of the F-105Ds was named Memphis Belle II after the famed World War II B-17.

Vietnam War

In spite of a troubled early service life, the F-105 became the dominant attack aircraft during the Vietnam War. The F-105 could carry twice the bomb load further and faster than the F-100, which was used mostly in South Vietnam. In a foreshadowing of its Wild Weasel role, the first F-105D combat mission of the war involved an attack on 14 August 1964 against an anti-aircraft artillery site on Plaine des Jarres. This mission was carried out by aircraft of the 36th TFS, 6441st Tactical Fighter Wing deployed from Yokota Air Base Japan to Korat Royal Thai Air Force Base. The first Thunderchief of the war was also lost in this mission (the pilot managed to eject safely). The first strike mission took place on 13 January 1965 with the destruction of the Ben Ken bridge in Laos. Following the start of Operation Rolling Thunder on 1 March 1965, a large number of F-105Ds were deployed in Royal Thai Air Force Bases at Khorat and Takhli. On 2 August 1967, F-105Ds from 335th and 338th Tactical Fighter Squadrons made the first of many successful raids on the Paul Doumer bridge. While the planes were first deployed with their original natural metal finish, they soon adopted the distinctive 2-green and tan Vietnam camouflage scheme which blended into the jungle landscape.

On a typical combat mission into North Vietnam, the F-105D carried two 450 US gallon wing-mounted fuel tanks, a 390 US gallon fuel tank in the bomb bay, and five 1,000 pound (454 kg) or six 750 pound (340 kg) bombs, and required inflight refueling both going to and sometimes returning from Hanoi 700 miles (1,125 km) distant. Thunderchiefs made a loop north of Hanoi over a mountain nicknamed the Thud Ridge [show location on an interactive map] 21°16′47″N 105°49′37″E / 21.27972, 105.82694 at high speed and low altitude in order to avoid the heavily defended airspace around the city. Although the ridge provided proper shielding from the North Vietnamese radars and SAMs, the installment of anti-aircraft artillery and a MiG fighter airfield at the southern end of the valley prevented the F-105s from fully exploiting the benefit of cover. The name "Thud Ridge" (also the name of a book by Jack Broughton about the F-105) came from the prominent role of the mountain in F-105 missions.

Republic F-105 Thunderchief: On June 4, 1983, the 419th Tactical Fighter Wing, Utah's only Air Force Reserve flying unit, began retiring the renowned F-105 Thunderchief with a 24-ship flyover of Hill Air Force Base. Personnel who had distinguished themselves in combat operations years before in Southeast Asia led and participated in the singular final tribute. USAF photo.Republic F-105 Thunderchief: On June 4, 1983, the 419th Tactical Fighter Wing, Utah's only Air Force Reserve flying unit, began retiring the renowned F-105 Thunderchief with a 24-ship flyover of Hill Air Force Base. Personnel who had distinguished themselves in combat operations years before in Southeast Asia led and participated in the singular final tribute. USAF photo.

Retirement

The Thunderchief was rapidly withdrawn from USAF service after the end of the Vietnam War. Only 833 F-105 Thunderchiefs had been built, and having lost nearly 50% of that production figure in Vietnam, by US military standards the F-105 was no longer considered combat-effective. Some aircraft remained in service in the 1970s and 1980s with Air Force Reserve and Air National Guard units, but their extended wartime service meant that many F-105s had already reached or exceeded their service lives by the mid-1970s. The F-105 Thunderchief was officially retired on 25 February 1984. and replaced by the F-4 Phantom II. The F-105, however, had a very good service life since most of its fellow US made 2nd generation aircraft were also retired from service in the mid-1970s, 10 years before the Thud retired.

In 1964, specially modified F-105Bs with ballast replacing the Vulcan cannon, a number of fuselage and wing reinforcements for aerobatics, and the addition of a smoke generator, briefly flew with the USAF Thunderbirds demonstration team. After only six shows, a fatal accident from overstressing the airframe forced a switch back to the F-100 Super Sabre.

Variants

YF-105A

Two pre-production prototypes.

YF-105B

Four pre-production aircraft.

F-105B

Initial production model, 71 built.

JF-105B

Test aircraft built from re-allocated RF-105B airframes; 3 built.

RF-105B

Proposed reconnaissance version of the F-105B; none built (three ordered but completed as JF-105Bs).

F-105C

Proposed dual-control trainer; cancelled in 1957, none built

F-105D

The definitive production model, all-weather capability thanks to advanced avionics, first flight 9 June 1959; 610 built.

RF-105D

Proposed reconnaissance version of the F-105D; none built.

F-105E

Proposed trainer version of F-105D; cancelled in 1959, none completed

F-105F

Two-seat trainer version of F-105D with lengthened forward fuselage, dual controls, taller fin, fully combat-capable, first flight 11 June 1963; 143 built.

EF-105F

Initial designatiob for a SEAD/Wild Weasel version, 54 conversion from F-105Fs.

F-105G

Two-seat Wild Weasel SEAD version, re-designation of the RF-105F conversions.

Specifications (F-105D)

Data from The Great Book of Fighters and Quest for Performance

General characteristics

* Crew: 1

* Payload: 14,000 lb (6,700 kg) of weapons

* Length: 64 ft 4.75 in (19.63 m)

* Wingspan: 34 ft 11.25 in (10.65 m)

* Height: 19 ft 8 in (5.99 m)

* Wing area: 385 ft² (35.76 m²)

* Airfoil: NACA 65A005.5 root, NACA 65A003.7 tip

* Empty weight: 27,500 lb (12,470 kg)

* Loaded weight: 35,637 lb (16,165 kg)

* Max takeoff weight: 52,546 lb (23,834 kg)

* Powerplant: 1× Pratt & Whitney J75-P-19W afterburning turbojet

o Dry thrust: - (-)

o Thrust with afterburner: 26,500 lbf (118 kN)

* Zero-lift drag coefficient: 0.0173

* Drag area: 6.65 ft² (0.62 m²)

* Aspect ratio: 3.16

Performance

* Maximum speed: Mach 2.08 (1,372 mph, 2,208 km/h) at 36,000 ft (11,000 m)

* Combat radius: 780 mi (680 nm, 1,250 km)

* Ferry range: 2,210 mi (1,920 nm, 3,550 km)

* Service ceiling 48,500 ft (14,800 m)

* Rate of climb: 38,500 ft/min (195 m/s)

* Wing loading: 93 lb/ft² (452 kg/m²)

* Thrust/weight: 0.74

* Lift-to-drag ratio: 10.4

* Time to altitude: 1.7 min to 35,000 ft (11,000 m)

Armament

* Guns: 1× 20 mm (0.787 in) M61 Vulcan cannon, 1,028 rounds

* Hardpoints: 5 plus bomb bay with a capacity of Up to 14,000 lb (6350 kg) of ordnance, including conventional and nuclear bombs, and AIM-9 Sidewinder and AGM-12 Bullpup missiles.,

Avionics

* NASARR R-14A radar

* AN/ASG-19 Thunderstick fire control system

* AN/ARN-85 LORAN (AN/ARN-92 in Thunderstick II-modified aircraft)

More photos: Republic F-105 Thunderchief photo gallery

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