Operation Bolo

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Operation Bolo
Part of Vietnam War

8th TFW F-4C Phantom II on static display at Pacific Coast Air Museum
Date January 2, 1967
Location North Vietnam
Result American victory
Combatants
United States Air Force North Vietnamese Air Force
Commanders
Robin Olds
Strength
56 F-4C Phantom IIs
(26 participated)		 16 MiG-21 'Fishbeds'
(11-14 engaged)
Casualties
None 7 Mig-21s destroyed
two MiGs probably destroyed

Operation Bolo was a famous air battle fought in the skies of the Democratic Republic of Vietnam on January 2, 1967, during the Vietnam War.

Bolo pitted the new American F-4 Phantom II air superiority fighter against its "rival" the Soviet-designed Mikoyan MiG-21 interceptor. Operation Bolo, considered to be one of the most successful combat ruses of all time,[1] prompted North Vietnamese pilots and strategists, as well as Soviet tacticians, to reevaluate their employment of the MiG-21.

Contents

[edit] Background

[edit] Opposing aircraft

By the start of 1967, the F-4 Phantom II had been in operational service with the United States Navy for six years, and with the United States Air Force since 1964. The latest fighter in American service, the F-4 had powerful engines, excellent handling, and an air-to-air configuration of eight air-to-air missiles. However, the Phantom suffered from one critical armament weakness – the lack of an internal cannon, as its original conception as a fleet defense interceptor dictated that air combat would occur at beyond visual range with radar-guided missiles. It was also a large, heavy fighter, with high wing loadings that degraded its performance in high-G turns, and produced large amounts of engine smoke that made it highly visible in combat. The F-4’s missile armament consisted of the AIM-7 Sparrow and the AIM-9 Sidewinder. Although the short-range AIM-9 was thought to be an effective weapon, the use of the beyond visual range AIM-7 was constrained by Rules of Engagement which in most cases required visual confirmation of a target before firing – essentially defeating any advantage that the missile would have conferred to the American pilots. Both missiles had exhibited reliability problems in 1966 combat, exascerbated by maintenance problems caused by the tropical conditions of Southeast Asia, with the majority failing to ignite, fuse, or guide to the target.

The F-4’s primary adversary during this engagement was the Soviet-built Mikoyan MiG-21 ‘Fishbed’, a small fighter designed as a short-range interceptor, a role that perfectly suited its use by the VPAF. Armed with two Vympel K-13 missiles (known to US pilots by their NATO designation "Atoll"), the MiG-21 had a rapid acceleration rate, was agile at supersonic speeds and at high altitudes, and significantly outperformed its primary target – the F-105 Thunderchief - in all flight regimes. A small, light fighter, its low wing loadings were excellent for air combat manuevering and its small size made it difficult to spot even when its adversary was warned of its presence. Typically, the MiG-21 was used in hit-and-run tactics; being vectored by Ground Control Intercept (GCI) to an intercept position to the vulnerable rear of an American strike formation, then executing a missile attack and diving away before fighter cover could intervene. Scoring its first kill in October 1966, in December intercepting MiG-21s shot down two F-105s and forced 20% of all strike sorties to jettison their bombloads.[2] At the time of Operation Bolo, the VPAF had 16 MiG-21's in its inventory.

[edit] The MiG threat

The agility of the MiG-21 and the Vietnam People's Air Force tactic of high speed slashing attacks from astern under GCI control posed a significant challenge to American pilots, who had become predictable by staging large formation strikes from Thailand flying roughly the same routes and times of day allowing the VPAF to challenge them with a relatively small force of 15 MiG-21 fighters used as point defense interceptors. The Air Force relied mostly on missiles to down enemy pilots and constrained by their rules of engagement and a fleeting adversary that only engaged when the situation was ideal, many American pilots were not even able to use this to their advantage. If the MiG-21 was a significant threat to the Phantoms, it was an even bigger threat to the F-105 Thunderchief used to conduct attack and bombing missions in the North Vietnamese interior. Heavily laden and relatively sluggish compared to its adversaries, and the primary means of ordnance delivery during Operation Rolling Thunder, the F-105 was the main target of VPAF pilots.

"Operation Bolo" was created to deal with the new MiG threat. Since October the F-105s had been equipped with QRC-160 radar jamming pods that had virtually ended their own losses to surface-to-air missiles, but had shifted SAM attacks to the Phantoms, unprotected because of a shortage of the pods. Rules of engagement that had previously permitted the F-4 MiGCAP to escort the F-105s in and out of the target area had been revised in December to limit MiGCAP penetration to the edge of SAM coverage. MiG interceptions had consequently increased, primarily by MiG-21s using high speed hit-and-run tactics against bomb-laden F-105 formations, and although only two bombers had been lost, the threat to the force was perceived as serious. Bombing of North Vietnamese airfields was still forbidden at the start of 1967, and 8th TFW wing commander Col. Robin Olds conceived on an air ambush as the best means of mitigating the threat.[3]

[edit] Robin Olds

Main article: Robin Olds

Colonel Robin Olds was the commander of the 8th Tactical Fighter Wing and an experienced fighter pilot who had become an double ace in two tours over Europe during World War II. He was sent to Southeast Asia to revive the performance of the 8th TFW and he did so from the cockpit. Five days after he arrived at Ubon, the 8th TFW lost an F-4C to an air-to-air missile shot from a MiG-21, the first such loss in the war.[4] Added to two other F-4 losses to MiGs in the two weeks preceding his taking command, Olds was upset by the sudden negative trend (only two USAF Phantoms had been shot down by MiGs previously, the most recent in April 1966), but was also convinced that his pilots could take on the MiG-21 and prevail if they could be drawn into the air on even terms. As the primary architect of Operation Bolo, he took advantage of the VPAF tactic of intercepting the F-105 strike formations using Ground Controlled Intercept (GCI). His idea was relatively simple: substitute Phantoms armed with air-to-air missiles for the bomb-laden F-105 strike aircraft and lure the MiGs into a dogfight.

[edit] Planning Operation Bolo

MiG-21 'Fishbed'
MiG-21 'Fishbed'

Olds’ assigned the planning of Operation Bolo to a quartet of veteran junior officers in his wing: the wing tactics officer Capt. John B. Stone, 1st Lt. Joseph Hicks, 1st Lt. Ralph F. Wetterhahn, and Maj. James D. Covington. Working under the tightest security, the pilots assigned to fly the mission would not be briefed until December 30th.[5]

The group planned for a coordinated mission by a "west force" of seven flights of F-4Cs from the 8th TFW at Ubon and an "east force" of seven flights of F-4Cs from the 366th Tactical Fighter Wing based at Da Nang Air Base, South Vietnam. The west force would simulate the F-105 strike force while the east force would cover alternate airfields and provide a barrier against MiGs attempting to flee to China. The task force also included 6 flights of F-105s for protection from SAMs, airborne radar support by College Eye EC-121 aircraft, and radar jamming support by EB-66s, escorted by four flights of F-104s of the 435th TFS at Ubon.

The planners determined that if the MiGs reacted, their fuel endurance from takeoff to landing would extend for a maximum 55 minutes. Arrival times of the F-4 flights over the targeted airfields were set five minutes apart to ensure maximum time for engagement and to attempt to run surviving MiGs out of fuel. The mission was also planned so that no other US aircraft would be present, allowing the first three flights of F-4s "missile free" engagement— without having to first identify the target.[6][7]

Everything hinged on getting the MiGs airborne; if they didn't take the bait, then the plan would not come to fruition. In order to deceive the North Vietnamese, the west force had to fly the same ingress routes, altitudes, and speeds as the F-105, use the same air refueling tanker tracks and altitudes, and use F-105 jargon on the radio. (However, to Olds' dismay, the flights were assigned call signs of MiGCAPs throughout the war, the names of American-made automobiles: Olds, Ford, Rambler, Lincoln, Tempest, Plymouth, and Vespa.)[8] The F-4s were fitted out with the QRC-160 jamming pods normally carried only by F-105s, so that their electronic signature would be the same, and the F-4s would also fly the inflexible line-abreast pod formations used by the F-105s to maximize pod effectiveness. The pods had to be mounted on one of the fuel tank wing pylons, forcing the F-4s to carry a centerline and single wing tank, creating an asymmetric imbalance that made takeoffs difficult (the aircraft would try to roll on liftoff to the side carrying the wing tank).[9]

The operation plan was presented to Gen. William Momyer, commanding the Seventh Air Force, on December 22, 1966. Momyer approved the plan, which was assigned the code name "Bolo", after the Filipino martial arts weapon. Col. Olds also charged his maintenance crews with inspecting, cleaning, and repairing all equipment on the aircraft assigned to the mission, a task that took several days. As soon as the F-4s were equipped with the QRC-160 Electronic Countermeasures Pods, the date of the attack was set for January 1, 1967.[10][8]

[edit] Executing the mission

The mission was delayed because of bad weather and rescheduled for January 2. The mission launched from Ubon that afternoon after another hour's delay, and Olds, leading the first flight, arrived over Phuc Yen airfield at 1500 local time. Flying southeast on the ingress route used by F-105s, the mission drew no defensive reaction, and Olds found that a floor of thick clouds blanketed the area below, concealing any view of MiGs taking off. Unknown to Olds, the North Vietnamese GCI controllers had delayed takeoffs by approximately 15 minutes because of the overcast. He reversed course and flew to the northwest. When three minutes had passed without contact, and with Ford flight almost in the area, he canceled the missile-free option.[7] Just as Ford flight arrived in the target area the first MiGs emerged from the clouds below.

[edit] Olds flight

The first attack came as the second flight of F-4s was also entering the area. Olds flight immediately dropped fuel tanks and lit afterburners to engage three MiGs that, although apparently emerging at random, actually had been directed to have the first appear at the flight's "six" (rear) and the next two moments later at its "ten" (left front), presenting one MiG with a tail-shooting solution and tactical surprise. All three flights that engaged MiGs later reporting encountering this tactic.

Olds 02, flown by mission planner Ralph Wetterhahn, scored the first kill by shooting the MiG with an AIM-9 Sidewinder as Olds 01, flown by Col. Olds, fired three missiles that failed either to launch or guide. Olds stated:

The battle started when the MiGs began to get out of the cloud cover. Unfortunately for me, the first one appeared in my ‘six o’clock’. I think it was more an accident than a planned tactic. As a matter of fact, in the next few minutes many other MiGs started to exit from the clouds from different positions.

I was lucky. The flight behind me saw the MiGs and tried to divert its attention. I broke to the left, sharply enough to get away of his line of fire, hoping that my wingman would take care of him. Meanwhile another MiG came out of the clouds, turning widely about my ’11 o’clock’ at a distance of 2,000 yards. He went into the clouds again and I tried to follow.

A third enemy plane appeared in my ‘10 o’clock’, from the right to the left: in simple words, almost in the opposite direction. The first MiG zoomed away and I engaged the afterburner to get in an attack position against this new enemy. I reared up my aircraft in a 45 degree angle, inside his turn. He was turning to the left, so I pulled the stick and barrel-rolled to the right. Thanks to this maneuver, I found myself above him, half upside down. I held it until the MiG finished his turn, calculating the time so that, if I could keep on turning behind him, I would get on his tail, with a deflection angle of 20 degrees, at a distance of 1,500 yards. That was exactly what happened. He never saw me. Behind and lower than him, I could clearly see his silhouette against the sun when I launched two Sidewinders. One of them impacted and tore apart his right wing.[11]

The vertical manuever, known as a "vector roll," positioned his Phantom above the tighter-turning MiG-21, then when it completed its turn, Olds dropped in behind it and fired two AIM-9 Sidewinder missiles. One struck the MiG's right wing and tore it off. The MiG went into a spiral and disappeared into the clouds below, the second kill of the battle. At nearly the same time, Olds 04, flown by Capt. Walter S. Radeker III, spotted a MiG tracking his element lead and manuevered to engage it. Radeker was unable get a consistently good tone (indicating missile lock), but launched. His Sidewinder guided perfectly, however, and struck the MiG just in front of its tail, sending it into a spin. Olds flight had destroyed three MiG-21s without suffering a loss and at its fuel consumption limits left the area.

[edit] Ford flight

Ford flight, led by 8th TFW Vice Commander Colonel Daniel "Chappie" James, Jr. entered the target area at 1505, just as the MiGs began to engage, and James radioed a warning to Olds.[7] Though he did not score a victory himself, James witnessed the victory made by his wingman, Captain Everett T. Raspberry:

"At 15:04 my flight was attacked by three MiGs, two from the ‘10 o’clock’ and one from the ´6 o’clock´. Initially I didn’t see this last one because I had been concentrating on those approaching head-on. My WSO excitedly warned me about this rapidly approaching MiG, which was within firing range of my #3 and #4. I hesitated a while before interrupting my attack against the two MiGs in front, because I had seen the ‘Olds’ flight passing below us a few seconds before. I thought that the plane seen by my WSO could be one of them. Despite that, I suddenly turned left and then right, and caught sight of the third MiG. I ordered to my numbers 3 and 4 to break right. As they did so, the MiG broke left for some mysterious reason and for a split second we were side by side. We were so close that, besides the red stars in his wings, I could clearly see the pilot’s face. I began a horizontal barrel roll to get away from him and into an attack position, once in position, I launched a Sidewinder. The missile missed because the evading MiG broke left at full throttle. But when he did it, he put himself in the line of fire of my number 2, Captain Everett T. Raspberry. I ordered him to follow the prey, because the two aircraft that I initially saw had been placed in my forward sector. I was in an advantageous position, so I fired two AIM-9s against them in a quick sequence, and I turned to place myself as wingman of my #2, Captain Raspberry. […] I kept on descending besides Captain Raspberry and I remember that I thought that he was still out of the optimal launching envelope. But he performed a barrel roll that placed him in a perfect position again and he launched an AIM-9 which hit against the tail section of the MiG-21. It was shaken violently and later fell in a slow, almost plane spin.”[11]

James, preoccupied with two MiGs approaching Ford flight head-on, was attacked from the rear by a MiG-21. He executed a horizontal barrel roll, got behind his attacker, and fired an AIM-9 that the MiG evaded. However the maneuver placed the MiG in front of Raspberry, who shot it down with a missile hit behind the cockpit. After Ford 02 scored its kill, Ford flight left the scene without loss, its success due partially to the high-speed maneuverability of the F-4 at 17,000 ft.[12]

[edit] Rambler flight

Rambler flight, the third into the area, was led by Captain John B. Stone, the wing tactics officer and one of the architects of Operation Bolo. When Rambler entered the engagement, Stone spotted a pair of MiGs popping up through a break in the clouds, dove and launched an AIM-7 Sparrow, which failed to ignite. Stone fired again a second Sparrow that successfully guided to one of the MiGs. Observing a third MiG behind him, he coordinated his manuevers with his wingman and steered the MiG into the line of fire of Major Philip P. Combies (Rambler 04). He saw the battle in this way:

"We flew at 13,440 feet (4,800 meters) above sea level and our speed was 540 knots. A little bit after completing a turn to the northwest, we identified a patrol of four MiG-21s in spread formation at a distance of 5 miles –about 8 kms- at ‘2 o’clock’ and below than us. Two more MiGs appeared 2 miles –about 3 kms- behind. . . . When the MiGs crossed in front of Stone, he started to follow, breaking left and losing height. Due to that, the flight spread wide to the right, and I found myself higher and somewhat to the right than the others. I kept the throttle to the minimum during the first phase of the combat. So, the MiGs broke to the left, and the engagement began. I choose one of the MiGs and followed him with my radar. I don't think that we ever exceeded 4 g during the whole engagement. I decided to follow the Navy pilots' tactics - at close range foregoing the radar tracking, but looking thru the reticle instead. When I realized that I was in the right position, I pushed the fire button, released it, pushed it again, and waited. I did not even see the first Sparrow. However, I followed the entire trajectory of the second one, from launch to impact. I fired the missiles at less than 2,000 yards from the MiG’s tail, height 9,800 feet (3,500 meters) and turning to the left. The second one hit the tail section of the enemy aircraft. A second later I saw a huge, orange ball of fire."[11]

Seconds later, another MiG-21 crossed in front of Rambler 02 and was apparently destroyed by a Sparrow fired by its pilot, Lawrence Glynn. The MiG, hit behind the tailfin, exploded in a fireball. This, the third MiG-21 downed by Rambler flight, raised the final score of the day to 7:0 in favor of the F-4s. SA-2 missile launches (five in all) began to threaten Rambler flight, which also disengaged. The entire combat lasted twelve minutes.

The final four flights of 8th TFW aircraft arrived to find the engagement over and departed the area because of the SAM threat, while the Da Nang-based East Force assessed the weather conditions and did not penetrate North Vietnamese airspace. Two of the Ubon-based West Force had aborted the mission for maintenance problems, and ultimately only 26 of the 56 assigned fighters entered the target area, and only 12 of those engaged.

[edit] Bolo summary

The following table summarizes the 8th TFW's 7 Mig-21 victories:[11]

Squadron Call Sign Aircraft Commander¹ Pilot¹ Missile
555 TFS Olds 02 1st Lt. Ralph F. Wetterhahn 1st Lt. Jerry K. Sharp AIM-7
555 TFS Olds 04 Capt. Walter S. Radeker III 1st Lt. James E. Murray III AIM-9
555 TFS Olds 01 Col. Robin Olds 1st Lt. Charles C. Clifton AIM-9
555 TFS Ford 02 Capt. Everett T. Raspberry, Jr. 1st Lt. Robert W. Western AIM-9
433 TFS Rambler 04 Maj. Philip P. Combies 1st Lt. Lee R. Dutton AIM-7
433 TFS Rambler 01 Capt. John B. Stone 1st Lt. Clifton P. Dunnegan, Jr. AIM-7
433 TFS Rambler 02 1st Lt. Lawrence J. Glynn, Jr. 1st Lt. Lawrence E. Cary AIM-7
¹In 1967 all USAF F-4s were crewed by two rated pilots, with the more experienced flying the front seat as "aircraft commander." The use of rated navigators as Weapon Systems Officers began in 1969.

[edit] Mission impact and followup

As the F-4s landed at Ubon, their ground crews lined the taxi way. As each Phantom passed, cockpits opened, the pilots indicated with upheld fingers the numbers of kills they'd scored. Of the 16 MiG-21s known to be in the VPAF inventory, 11 to 14 had been engaged (depending on the source), with 7 destroyed and two others probably shot down (by Combies and Maj. Herman L. Knapp, Rambler 03).

The success of Operation Bolo led Seventh Air Force to plan a similar mission simulating an RF-4C photo reconnaissance mission. The immediate reaction to Bolo by the VPAF was to challenge the daily "recce" mission on the two days immediately following Bolo, in each case causing the mission to be aborted. On both January 5 and January 6, a pair of 555th TFS F-4C Phantoms, flying a close formation to appear as a single target on North Vietnamese radar, flew the high-speed profile. On the second day, intercepted by 4 MiGs, they again surprised and shot down two during the encounter, with Crab 01 (Capt. Richard M. Pascoe and 1st Lt. Norman E. Wells) and Crab 02 (Maj. Thomas M. Hirsch and 1st Lt. Roger J. Strasswimmer) each scoring a kill.[13]

For the North Vietnamese (and their Soviet allies who supplied the MiG-21 aircraft and helped set up the integrated air defense network), the two reverses resulted in a husbanding of their assets by grounding the MiGs for several months for retraining and devising of new tactics.

[edit] Notes

  1. ^ Bolo has been detailed in most literature on modern air combat, including all of the sources noted below
  2. ^ Sherwood, John Darrell (1999). "Old Lionheart", Fast Movers: Jet Pilots and the Vietnam Experience. Free Press. ISBN 0312979622. , 73
  3. ^ Sherwood, 31
  4. ^ Marshall L. Michel (1997). Clashes: Air Combat Over North Vietnam 1965-1972. Naval Institute Press. ISBN 1557505853. , 63
  5. ^ Sherwood, 33
  6. ^ Lou Drendel (1984). ...And Kill MIGs. Squadron/Signal Publicatiopns. ISBN 0897470567. , 11, quoting 1LT Dunnegan
  7. ^ a b c
  8. ^ a b Mig Sweep. AIR FORCE Magazine. Retrieved on 8 Feb 2007. Boyne's account states Jan. 2 but is apparently a typographical error. He makes it clear in the next paragraph that the mission was delayed 24 hours to January 2.
  9. ^ Drendel, 12
  10. ^ Sherwood, 33
  11. ^ a b c d Zampini, Diego (2003). Robin Olds Mastermind of Operation Bolo. Acepilots.com. Retrieved on 2006-12-08.
  12. ^ Boyd: The Fighter Pilot who changed the Art of War, by Robert Coram, page 215
  13. ^ Drendel, 17-18 and 20-21

[edit] External links

[edit] Sources

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