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Arsenal – F-105D Thunderchief

By Carl O. Schuster
7/28/2010 • Drafts, Gear

Illustration: Gregory Proch

Click here to view larger image.

The U.S. Air Force deployed nearly 400 F-105s to Indochina, which flew more than 20,000 missions, accounting for more than 75 percent of all U.S. bombing sorties in the war between July 1965 and November 1972. The vanguard of what would become the largest U.S. aerial attack force in Southeast Asia, eight F-105Ds of the 36th Tactical Fighter Squadron deployed from Japan to Thailand’s Korat Royal Thai Air Force Base on August 9, 1964, and conducted their first mission over North Vietnam on February 8, 1965. Those early raids evolved into Operation Rolling Thunder. Its bombload and range soon made the F-105 the Air Force’s primary fighter-bomber in Vietnam.

Republic’s F-105 Thunderchief was developed as a supersonic close-air-support aircraft with a nuclear weapon delivery capability. The F-105D that entered production in 1959 was the first all-weather-capable model, incorporating radars for navigation and  target tracking, the AN/ASG-19 Thunderstick bombing/navigation system and a computerized navigation assistance system.

The F-105D was the first aircraft to employ fully integrated avionics. The new systems resulted in a lengthened fuselage and added about 1,000 pounds in weight, making the F-105D, with its Pratt and Whitney J-75-P19W engine, the heaviest single engine aircraft the Air Force would ever fly. Its long takeoff run and heavy wing loading reportedly led to its nickname, “Thud.”

Battle damage proved that the primary and secondary hydraulic systems were too close together, so the secondary system was moved deeper into the fuselage. A rearward-looking combat camera was installed to facilitate post-mission battle damage assessment. The more accurate and reliable Thunderstick II bombing system was introduced in 1968. Some F-105s were modified for night strike missions, and the final model to see service, the F-105G, was modified to conduct air defense suppression (ADS), or “Wild Weasel” missions, against North Vietnamese surface-to-air missile (SAM) batteries. Thuds began to be phased out in 1968 with the transition to McDonnell F-4s. The last F-105Ds departed the theater in December 1970, leaving the 6010th Wild Weasel Squadron (WWS), redesignated the17th WWS in late 1971, as Indochina’s last remaining F-105 unit.

Thud pilots flew over some of the world’s most heavily defended air space. Policy limited their targets and dictated their routes and timing of strikes, and the planes suffered accordingly. More than 315 F-105s were lost in combat and 61 to accidents. Of those, 280 were downed by anti-aircraft artillery, while SAMs accounted for 24 and MiGs shot down 17. Employed in a fashion for which it was never intended and under combat conditions that inhibited pilot initiative and freedom of action, the F-105 suffered the highest loss rate of any airplane that flew over North Vietnam.

F-105D Thunderchief
Length                  64 ft. 5.3 in.
Wingspan             34 ft. 11 in.
Height                   19 ft. 8 in.
Max. weight          52,838 lbs.
Max. speed           Mach 1.5
Combat range       948 nautical miles
Max. bombload    16,500 lbs.
Service ceiling      48,500 ft.

6 Responses to Arsenal – F-105D Thunderchief

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  2. Jim Moore says:

    Hello…..I was with the 354th TFS in Takhli, Thailand from Feb 1966 to Feb 1967. I was on a weapons load team and my exact duties were to drive the MJ1 Bomb Lift Truck or the “jammer” as we called it. I also strung all the bombing wire and fused the bombs as well. I remember our squadron commander was a Col. Phil Gast or Ghast. Great guy. We worked seven days a week, 12 hours a day plus and had a three day R&R in a year there. We worked our tails off for sure. Our load team was made the Load Standardization Team which meant we were the best and every other load team had to load the weapons like us as we had the best safety record, etc. Quite a time.

  3. Joseph F. Willis says:

    I was at Takhli with the 354TFS ,Apr66/67 Crew Chief F105 62-4266 aand 62-4338 all that serviced at Takhli did an outstanding job. God bless the USA

  4. Darrel Wilson says:

    The inflight refueling points were both of the left side of the nose (fuselage).

    With the boom receptacle being above and forward of the probe just left of centerline in front of the windscreen.

    The term Thud was originally sarcasm for the F105 because all of its hydraulic systems; primary and secondary were interconnected. With the result being when the system was hit all the flight controls went out in short order and one could not flight it resulting in a Thud sound it hit the ground. A modification corrected this problem with allowed the basic flight system to operate, and the term became a compliment due to the beating it could take and still keep flying.

    With the 357TH TFS Takhli, Crew Chief F105F 63-8301, Apr 68-69

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