Early 1967 found the situation at the 366th Tactical
Fighter Wing, Danang AB, Vietnam “fluid”, our mission was constantly
changing as were our tactics, frustration was high and morale could have
been a lot better. Our three Tactical Fighter Squadrons, the 389th, 390th
and 480th, were equipped with the F-4C Phantom, at the time the premier
fighter in the Air Force inventory. Our aircrews were flying a variety
of missions; close air support for the US Army and Marines in South Vietnam,
interdicting supply and communication lines over North Vietnam and Laos,
top cover for F-105 Thunderchiefs (“Thuds”) bombing in North Vietnam and
other special missions fragged by 7th Air Force. Our World War II forebears
of the 366th Fighter Group would have been proud of us, we were some of
the best “mud shovelers” in the world – strafing, bombing, laying down
CBU's (cluster bomb units), etc. Strafing was performed using the SUU-16
gun pod, an electrically driven, six barrel “Gatling” minigun containing
1000 rounds of 20 mm ammunition with a firing rate of 100 rounds per
second. For whatever reason, our aircraft losses were unacceptably high
and in mid-February “Charlie” (the Viet Cong) had visited us on the ground
with Russian 144mm rockets, some of which landed in one of the barracks
areas on the base.
When flying “up North”, our aircrews were hamstrung by insane Rules
of Engagement – we were prohibited from flying within 10 miles of the center
of Hanoi, 4 miles from the center of Haiphong and 30 miles from the China
border. Furthermore we could only strike very restricted targets within
30 miles of Hanoi and 10 miles of Haiphong. Until the middle of April we
couldn’t even strike North Vietnamese airfields, so their jets could attack
with impunity and dash back to their “safe havens”.
On those rare instances when our pilots did tangle with enemy aircraft
– MiG-17s, MiG-19s and MiG-21s -- the smaller, lighter, more agile aircraft
could turn tighter than the heavier F-4s. The Phantom's close-in air-to-air
capability was further hampered by the limitations of its weapons. When
the F-4 was designed in the early 1950’s the assumption was that missiles
would be the weapons of the future so there was no need to include a gun
on the aircraft. Enemy pilots quickly figured out that the radar beam-riding
AIM-7 "Sparrow" and infrared heat-seeking AIM-9 "Sidewinder" missiles didn't
arm themselves until 1500 feet after being fired so one of their favorite
tactics when being chased was to allow the Phantoms to close within 1500
feet. It was not uncommon to hear pilots returning from a flight exclaim,
“If I only had a brick I could have knocked him out of the air!” or something
similar.
On January 2, 1967, the 366th TFW participated in Operation Bolo,
a MiG sweep over North Vietnam. The winter monsoon weather was bad.
Our rivals, the F-4s of the 8th Tactical Fighter Wing “Wolfpack” at Ubon
AB, Thailand, knocked down seven MiG’s and, as luck would have it, we got
none. And, of course, they got all the publicity and made the most of
it. After the 8th TFW got two more MiG’s on January 6th the North Vietnamese
Air Force decided to stand down for training and no more MIG’s were seen
until early March. In March and into April, there were a few encounters,
with seven MiG’s being downed by F-105 Thunderchiefs from the 355th Tactical
Fighter Wing, Tahkli, Thailand. But it was clear from their tactics that
enemy pilots didn't want to come up and play with the Phantoms.
The Gun Comes of Age.
Things were clearly due for a change and when they did, they changed
fast. On March 20th, 1967, the 366th TFW received a new commander, Colonel
(Brig. Gen. selectee) Jones E. Bolt and within a few days, a new Deputy
Commander for Operations, Colonel Frederick C. "Boots" Blesse. General
Bolt describes what happened next.
“After a few days at Danang I scheduled myself as the element lead
in a flight of four to fly top cover for the “Thuds” into Route Pack 6
(Hanoi). After a detailed briefing we went to our aircraft and I could
not believe the configuration of the F-4. There was a 600 gallon centerline
tank, the ECM (Electronic Countermeasures) pod on the left outboard station
where we normally had a 400 gallon fuel tank; a 400 gallon tank on the right
outboard station as it was supposed to be; the two Sidewinder missiles
on each of the two inboard stations and of course the Sparrow missiles on
the fuselage as was normal. These were the radar guided missiles we always
carried on top cover or air-to-air missions. The airplane was asymmetrically
loaded and it was not only unstable but would fly sideways! The only saving
grace to this lousy configuration was that as soon as we hit the Black River
going into North Vietnam we would jettison the centerline tank and that
would make the airplane fly a little better. But if you got into a fight
with the MiG’s you would jettison everything except the ECM pod. We used
to joke among ourselves occasionally that every time we dropped the 600 gallon
centerline tank we had just dropped a Cadillac on the North Vietnamese.
But the seriousness of dropping the centerline tank was that if you did
not drop it in straight and level flight under 450 knots it was likely to
damage the aft fuselage and the elevators on the airplane -- not a good
situation over enemy territory.
“After landing and debriefing I called my Ops and Maintenance people
together and asked them how they came up with this configuration. Everybody
said that the reason was that the ECM pod which was much smaller than
the 400 gallon fuel tank and resulted in much less drag, could only be
carried on the outboard station and you had to drop off the outboard fuel
tank to do that. This was a case of the Maintenance people dictating to
the Ops people how the airplane would be configured and it was a terrible
mistake. Not only was the airplane unstable to fly that way it was terribly
expensive to drop all those tanks on almost every mission. And keep in
mind that we were flying 16 top cover sorties every day at the least.
“I gave the problem some thought that night and talked to my squadron
commanders and I just knew that there was a better way. The next morning
I went down to our armament shop and got in touch with the Chief Master
Sergeant who ran the place and had been running my armament shop at the F-4
Combat Crew Training Wing at Davis-Monthan AFB, AZ that I commanded before
going to Vietnam. I said to him, ‘Chief, can you make a wiring harness that
can be installed on the inboard pylon that will operate the ECM pod?’ He
said to me, ‘ we’ll give it a try, but you know, Colonel, we cannot legally
rewire the airplane without getting permission from Logistics Command because
the inboard pylons are wired to carry nuclear weapons.’ I told my good
Chief... that if he did not say anything about it I would not. I told
him the reason was that we needed to do something about the configuration
of the airplane to make it symmetrical and further that we could not hit
a MIG-17’s and few MiG-21’s with the Sidewinders and only occasionally with
the Sparrows and I wanted to put the (SUU-16) gun pod on the centerline station.
But to do this we had to drop off two Sidewinders and install the ECM pod
on the inboard pylon. This would give us a pretty stable and symmetrical
airplane and we would not have to drop off those tanks on almost every mission.
“The next afternoon the Chief called me to come down to his shop
and we got into my staff car and went out to the F-4 he had rewired.
It was a very simple wiring harness with a cannon plug on each end that
could be removed in a couple of minutes and the ECM pod worked great.
I flew the airplane and checked it out with our radar site at Monkey Mountain
and it worked like a charm. I told him to make enough of them so we could
configure enough airplanes to fly 16 sorties a day into Route Pack Six to
cover the Thuds. I talked to all the Ops people and they were ecstatic
that we were putting the 20 mm gun pod on the centerline and they could
hit the MiG-17s and MIG-21’s even though we had a lousy gun sight in the
F-4C.”
The first hurdle overcome, Colonel Bolt called Lt. Gen. Momyer, the
7th Air Force Commander in Saigon, to inform him, “because, after all,
he was my boss and would be writing my performance report and possibly my
obituary”. Receiving approval to move forward, Colonel Bolt turned the
project over to Colonel Blesse and the Ops people to “wring out” the new
configuration. Colonel Blesse put together a weapons section comprised
of Lt. Col. Fred Haeffner, Majors Sam Bakke, Bob Dilger, Ed Lipsey and
Jerry Robinette and Captains "Skip" Cox, Jim Craig and Bob Novak. Throughout
the month of April they worked through every conceivable situation including
gun problems, munitions loads, barrier procedures, chaff drops, drag chute
procedures, ECM devices, bombing and air-to-air procedures. One of the
major problems to be surmounted was that the F-4 did not contain a computing
gun sight. Another peculiarity was that the SUU-16 gun pod was self-powered
by a small turbine (known as a “rat”) which was deployed in flight and worked
reasonably well above 500 knots -- but only if deployed at speeds below
450 knots. If deployed at a faster speed its performance was questionable.
With all the problems worked through, in early May Colonel Blesse
flew down to Saigon to brief General Momyer and receive final approval.
General Momyer’s approval was luke warm at best and may have been influenced
by a comment made by Colonel Robin Olds, the 8th Tac Fighter Wing commander,
who happened to be present at the briefing and who dismissed the presentation
with, “General, I wouldn't touch that thing with a ten-foot pole.” But
“GO” was the word and with modification of more aircraft the hunt was
on.
About this time, a change was made in air tactics of our strike forces.
Throughout March and April, MIGCAP F-4s would sweep through the target
area five minutes prior to the arrival of the flights of F-105 strike aircraft
which were themselves spaced three to five minutes apart. In May this
was changed so that the first flight of F-105s would be closely followed
by a flight of four MIGCAP F-4s which in turn would be followed by more
F-105s and finally a flight of Phantoms bringing up the rear.

The
first 366th F-4s carrying guns for air-to-air combat were flown into Route
Pack Six starting on May 12th but for the first two days the strike aircraft
went unchallenged. On May 14th, sixteen MIG's rose to take on the first
wave of F-105s. Seven of the MIG's tangled with four Phantoms and two MiG's fell as the first victims of the guns wielded by Major Jim Hargrove
and Capt Jim Craig. The second F-4 flight also downed a MiG with a Sparrow
fired by Major Sam Bakke (see separate story, “
May
14, 1967 - The Day of the Gun
”).
During the period April 23 - June 5, 1967 eleven MiG's were downed
by aircrews of the 366th Tactical Fight Wing -- four to the 20 mm guns.
No USAF Tactical Fighter Wing downed as many aircraft in such a short
period in the entire eight years of the air war in the skies over Southeast
Asia. As Lt. Colonel (later Major General) Bob Tanguy, 480th Tactical
Fighter Squadron commander, said, "I don't think the MiG’s ever figured
out that the F-4s were carrying guns." And he may well be right because
a review of after action reports shows that no parachutes were reported
from the MiG’s downed by F-4C guns. In any case after June 5th the North
Vietnamese Air Force, having lost 54 aircraft in April, May and June, went
into another stand down for the remainder of June and July to reevaluate
their situation. At about the same time, the 366th Wing’s mission was again
changed back to air-to-ground work, but not before Colonel Blesse and a group
of pilots had gotten together and come up with a name and emblem by which
the 366th Tactical Fighter Wing has been known ever since, “The Gunfighters”.
Epilogue.
By October 1967 all F-4C’s in Southeast Asia, and later the F-4D's,
were reconfigured to carry the SUU-16 and SUU-23 minigun pods for air-to-air
combat – including those of the 8th Tactical Fighter Wing in Thailand.
Perhaps General Bolt provides the best summary, “(The gun pod) was so successful
that when the Air Force got control of the F-4 program from the Navy and
built the F-4E it had a 20 mm gun built into the airplane. The F-4E was the
best fighter in the world in its day and if we had that airplane with the
gun in it we would have had much more success against the MIG-17s and 21s
in Southeast Asia. We have not built a fighter since that did not have a
gun built in. . . . It was a hard lesson we learned or I should say re-learned.
It's a shame we have to keep ‘re-inventing the wheel’. If our present
day Air Force leaders do not read and pay attention to history then we
will make the same stupid mistakes again and again and again.”
Acknowledgements: Material for this monograph was gathered from many
sources, among them: “Aces & Aerial Victories, The United States
Air Force in Southeast Asia 1965-1973”, Office of the U.S. Air Force Historian;
“Check Six” by Frederick C. Blesse, Maj. Gen., USAF, Ret.; letters and
telephone interviews with Jones E. Bolt, Maj. Gen., USAF, Ret.; Robert
Tanguy, Maj. Gen., USAF, Ret.; Robert D. Janca, Colonel, USAF, Ret.; and
James A. Hargrove, Lt. Col., USAF, Ret.