Tag Archives: Lycoming T53-L-13

6 January 1968

Major Patrick Henry Brady, Medical Service Corps, United States Army. (AMEDD)

The President of the United States in the name of The Congress takes pleasure in presenting the MEDAL OF HONOR to

MAJOR PATRICK HENRY BRADY

Medical Service Corps, United States Army

for service as set forth in the following

Citation:

Major Patrick Henry Brady, Medical Corps, United States Army
Major Patrick Henry Brady, Medical Service Corps, United States Army

For conspicuous gallantry and intrepidity in action at the risk of his life above and beyond the call of duty, Maj. Brady distinguished himself while serving in the Republic of Vietnam commanding a UH-1H ambulance helicopter, volunteered to rescue wounded men from a site in enemy held territory which was reported to be heavily defended and to be blanketed by fog. To reach the site he descended through heavy fog and smoke and hovered slowly along a valley trail, turning his ship sideward to blow away the fog with the backwash from his rotor blades. Despite the unchallenged, close-range enemy fire, he found the dangerously small site, where he successfully landed and evacuated 2 badly wounded South Vietnamese soldiers. He was then called to another area completely covered by dense fog where American casualties lay only 50 meters from the enemy. Two aircraft had previously been shot down and others had made unsuccessful attempts to reach this site earlier in the day. With unmatched skill and extraordinary courage, Maj. Brady made 4 flights to this embattled landing zone and successfully rescued all the wounded. On his third mission of the day Maj. Brady once again landed at a site surrounded by the enemy. The friendly ground force, pinned down by enemy fire, had been unable to reach and secure the landing zone. Although his aircraft had been badly damaged and his controls partially shot away during his initial entry into this area, he returned minutes later and rescued the remaining injured. Shortly thereafter, obtaining a replacement aircraft, Maj. Brady was requested to land in an enemy minefield where a platoon of American soldiers was trapped. A mine detonated near his helicopter, wounding 2 crewmembers and damaging his ship. In spite of this, he managed to fly 6 severely injured patients to medical aid. Throughout that day Maj. Brady utilized 3 helicopters to evacuate a total of 51 seriously wounded men, many of whom would have perished without prompt medical treatment. Maj. Brady’s bravery was in the highest traditions of the military service and reflects great credit upon himself and the U.S. Army.

// Richard M. Nixon//

President

Call sign, "Dust Off." (U.S. Army)
Call sign, “Dust Off.” (U.S. Army)

Major General Patrick Henry Brady was born 1 October 1936 at Philip, South Dakota, the son of Michael and LaVona Brady. He attended O’Dea High School, Seattle, Washington, and then graduated from Seattle University with a bachelor’s degree in psychology. As a member of the Reserve Officers Training Corps (ROTC), he received a commission as a second lieutenant in the Medical Service Corps, United States Army Reserve, 20 March 1959.

On 17 September 1959, 2nd Lieutenant Brady was transferred to the Regular Army, with his date of rank retroactive to 8 April 1959. He was promoted to 1st lieutenant, 8 April 1962. Lieutenant Brady served in Berlin, Germany from 1959 to 1963. Lieutenant Brady was promoted to the rank of captain, Army of the United States (AUS), 8 April 1963. (Brady’s permanent rank in the Regular Army was advanced to captain, 8 April 1966.)

In 1963, Brady was sent to the Army Aviation School at Fort Rucker, Alabama, to be trained as a helicopter pilot. He received his wings in December and the following month was sent to the Republic of Vietnam, assigned to the 57th Medical Detachment (Helicopter Ambulance).

When the unit’s commanding officer was killed in action, Captain Brady assumed command of the 57th’s Detachment A at Sóc Trăng Airfield. After completing his combat tour, Captain Brady was assigned as a helicopter pilot at Fort Benning, Georgia.

Major Patrick Henry Brady in the cockpit of a UH-1 Huey “Dust Off” medical evacuation helicopter, Republic of Vietnam, circa 1968. (VHPA)

Captain Brady was promoted to the rank of major, 3 July 1967. In 1967 he was reassigned to the 54th Medical Detachment (Helicopter Ambulance), 67th Medical Group, 44th Medical Brigade, and after the unit completed training, deployed to Chu Lai, Vietnam. It was while serving with this unit that he flew the missions for which he was awarded the Medal of Honor.

The Medal of Honor was presented to Major Brady by President Richard M. Nixon in a ceremony at The White House, Washington, D.C., 9 October 1969.

President Richard M. Nixon presented the Medal of Honor to four soldiers of the United States Army at The White House, 9 October 1969. Left to right: Sergeant Robert Martin Patterson, Captain James Michael Sprayberry, President Nixon, Captain Jack Howard Jacobs, and Major Patrick Henry Brady. (NBC News)

During two combat tours in Vietnam, Major Brady flew more than 2,000 combat missions and rescued as many as 5,000 wounded soldiers.

Patrick Brady served in the United States Army for thirty-four years, rising to the rank of Major General. Major General Brady has been awarded the Medal of Honor, Distinguished Service Cross, Distinguished Service Medal with oak leaf cluster (two awards), Defense Superior Service Medal, Legion of Merit, Distinguished Flying Cross with silver oak leaf cluster (six awards), Bronze Star with one oak leaf cluster (two awards) with “V” Device (“participation in acts of heroism involving conflict with an armed enemy”), Purple Heart, Meritorious Service Medal with two oak leaf clusters (three awards), Air Medal with “V” Device (52 awards), and Army Commendation Medal with oak leaf cluster (two awards).

Major General Patrick Henry Brady, Medical Corps, United States Army

Major General Brady retired in 1983 and lives in Sumner, just south of Auburn, Washington, with his wife, the former Nancy Lee Parsek, whom he met in high school. They have six children. Two are graduates of the United States Military Academy at West Point, New York. A daughter, Meghan Brady, who also graduated from the ROTC unit at Seattle University, served as an officer in the Medical Service Corps with duty in Kosovo and the invasion of Iraq. Captain Brady was awarded the Bronze Star.

Major General Brady and Captain Brady are co-authors of Dead Men Flying: Victory in Vietnam (WND Books, 2012).

Major General Patrick Henry Brady, U.S. Army (retired) with Senator John Cornyn of Texas, as they announce The Dust Off Crews of the Vietnam War Congressional Gold Medal Act, at Fort Sam Houston, Texas, 11 November 2015. (U.S Army)
Major General Patrick Henry Brady, U.S. Army (retired) with Senator John Cornyn of Texas, as they announce The Dust Off Crews of the Vietnam War Congressional Gold Medal Act, at Fort Sam Houston, Texas, 11 November 2015. (U.S Army)

The Bell Helicopter Co. UH-1H Iroquois (Model 205A-1) is an improved variant of the UH-1D (Model 205), which was itself derived from the UH-1B (Model 204). The type’s initial military designation was HU-1, and this resulted in the helicopter being universally known as the “Huey.”

The UH-1H is a single main rotor/tail rotor medium helicopter powered by a turboshaft engine. It can be flown by a single pilot, but is commonly flown by two pilots in military service. The helicopter has an overall length of 57 feet, 0.67 inches (17.375 meters) with rotors turning. The fuselage is 41 feet, 5 inches (12.624 meters) long. The two blade semi-rigid, under-slung main rotor has a diameter of 48 feet, 3.2 inches (14.712 meters), and turns counter clockwise when viewed from above. (The advancing blade is on the helicopter’s right.) At 100% NR, the main rotor turns 324 r.p.m. The two blade tail rotor assembly has a diameter of 8 feet, 6 inches (2.591 meters). It is on the left side of the pylon in a pusher configuration and turns counter-clockwise as seen from the helicopter’s left. (The advancing blade is above the axis of rotation.) The helicopter has a height of 13 feet, 7.4 inches (4.150 meters), measured to the top of the mast.

A Bell UH-1H helicopter ambulance, Vietnam, 1969.
A Bell UH-1H helicopter ambulance, Vietnam, 1968. (John Metcalf, “Dustoff 68,” via dustoff.net)

The UH-1H is powered by a Lycoming LTC1K-4 (T53-L-13) turboshaft engine rated at 1,400 shaft horsepower, though it is derated to the helicopter’s transmission limit. The T53-L-13 is a two-shaft free turbine with a 6-stage compressor (5 axial-flow stages, 1 centrifugal-flow stage) and a 4-stage axial-flow turbine (2 high-pressure stages, 2 low-pressure power turbine stages). The T53-L-13 is 3 feet, 11.9 inches (1.217 meters) long, 1 foot, 11.0 inches (0.584 meters) in diameter and weighs 549 pounds (249 kilograms).

The UH-1H has a maximum gross weight of 9,500 pounds (4,309.1 kilograms). Its maximum speed, VNE, is 124 knots (143 miles per hour, 230 kilometers per hour). With full fuel, 206.5 gallons (781.7 liters), the helicopter has a maximum endurance of three hours.

5,345 UH-1H Hueys were built, and many of the earlier UH-1Ds were upgraded to the UH-1H standard.

A Bell UH-1H medevac helicopter returns to its base, while ground personnel standby to offload the injured. (U.S. Army)
A Bell UH-1H medevac helicopter landing while ground personnel standby to offload the injured. (Free Republic)

© 2019, Bryan R. Swopes

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7 September 1965

Bell Model 209 prototype, N209J, in flight with skids retracted. (Bell Helicopter Co.)
Bell Model 209, N209J, prototype of the AH-1G Huey Cobra attack helicopter, in flight with landing skids retracted. (Bell Helicopter Company)

7 September 1965: First flight of the prototype Bell Model 209 attack helicopter. Test pilot William Thomas (“Bill”) Quinlan was in command. The duration of the flight was twelve minutes.

The Model 209 was a private venture, built in just seven months and rolled out at Fort Worth, Texas, 2 September 1965. The prototype aircraft combined the drive system, rotors and tail boom of the production UH-1C gunship with a streamlined fuselage which placed the two pilots in tandem.

The prototype was equipped with retractable landing gear which gave the 209 increased speed, but the expense and complexity were enough that this feature was not included on production aircraft.

This helicopter would be developed into the famous AH-1G Huey Cobra.

N209J,the Bell Model 209 prototype, shown in camouflage colors. (Bell Helicopter Company)
N209J, the Bell Model 209 prototype, shown in camouflage colors. (Bell Helicopter Company)

The second prototype, AH-1G 66-15246, was used by the Army for flight testing at Edwards Air Force Base, California, from 3 April to 21 April 1967.

66-15246 had an overall length of 52 feet, 11.65 inches (16.146 meters) with rotors turning. The fuselage was 44 feet, 5.20 inches (13.433 meters) long, and it was 3 feet, 0 inches (0.914 meters) wide. The HueyCobra had a short “stub wing” with a span of 10 feet, 11.60 inches (3.343 meters). Its angle of incidence was 14°. The wing’s area was 27.8 square feet (2.6 square meters). 66-15426 had an empty weight of 5,516 pounds (2,502 kilograms) and maximum gross weight of 9,500 pounds (4,309 kilograms).

Bell Model 209, N209J, prototype of the AH-1G Cobra, with landing skids extended. (U.S. Army)

The two-bladed Model 540 “door-hinge” main rotor was 44 feet, 0 inches (13.411 meters) in diameter. The blades had a chord of 2 feet, 3 inches (0.686 meters) and 10° negative twist. The main rotor turned counter-clockwise when viewed from above. (The advancing blade is on the helicopter’s right.) Normal rotor r.p.m. (power on) was 314–324 r.p.m., and power off, 304–339 r.p.m. The minimum transient rotor speed, power off, was 250 r.p.m.

The two blade tail rotor assembly had a diameter of 8 feet, 6 inches (2.591 meters) with a chord of 8.41 inches (0.214 meters). There was no twist. It was mounted on the left side of the pylon in a pusher configuration and turned counter-clockwise as seen from the helicopter’s left. (The advancing blade is above the axis of rotation.) The tail rotor pylon was cambered to allow aerodynamic forces in forward flight to “unload” the tail rotor.

Bell AH-1G Cobra three-view drawing. (U.S. Army Aviation Systems Test Activity)

The AH-1G was powered by a Lycoming LTC1K-4 (T53-L-13) turboshaft engine rated at 1,400 shaft horsepower, though it was derated to the helicopter’s transmission limit. The T53-L-13 is a two-shaft free turbine with a 6-stage compressor (5 axial-flow stages, 1 centrifugal-flow stage) and a 4-stage axial-flow turbine (2 high-pressure stages, 2 low-pressure power turbine stages). The T53-L-13 is 3 feet, 11.9 inches (1.217 meters) long, 1 foot, 11.0 inches (0.584 meters) in diameter and weighs 549 pounds (249 kilograms).

The speed of the Cobra was effected by the armament configuration, whether “clean,” light or heavy scout, or “heavy hog.” At 5,000 feet (1,524 meters), the cruise speed in the clean configuration was 138.0 knots (158.8 miles per hour, 255.6 kilometers per hour); light scout, 134.0 knots (154.2 miles per hour, 248.2 kilometers per hour); and heavy hog, 127.0 knots (146.2 miles per hour, 235.2 kilometers per hour). The maximum airspeed in level flight was 149.0 knots (171.5 miles per hour, 276.0 kilometers per hour); 144.0 knots (165.7 miles per hour, 266.7 kilometers per hour); and 136.5 knots (157.1 miles per hour, 252.8 kilometers per hour), respectively.

The limiting airspeed (VNE) was 190 knots (KCAS) (219 miles per hour, 352 kilometers per hour) below 3,000 feet (914 meters) density altitude.

In autorotation, the airspeed for the minimum rate of descent was 74.0 knots (85.2 miles per hour, 137.1 kilometers per hour) with the main rotor turning 294 r.p.m., resulting in a rate of descent of 1,750 feet per minute (8.89 meters per second).

Bell AH-1G Cobra. (U.S. Army)

The basic armament for the AH-1G Cobra was an Emerson M28 turret which could be equipped with one or two General Electric M134 Miniguns, or a combination of a Minigun with a Philco Ford M129 automatic grenade launcher, or two grenade launchers. Each Minigun was supplied with 4,000 rounds of 7.62 NATO ammunition, while a grenade launcher had 300 rounds of 40 × 53 millimeter high-velocity explosive ammunition.

Four hardpoints on the stub wing could be loaded with M18 7.62 NATO Minigun pods; XM35 pods, containing a short-barreled General Electric XM195 20 millimeter Gatling gun (a variant of the M61 Vulcan); rocket pods with seven or nineteen 2.75-inch unguided rockets.

The prototype Cobra, Bell Model 209 N209J, is in the collection of the U.S. Army Aviation Museum, Fort Rucker, Alabama, as is the second prototype, 66-15246.

© 2017, Bryan R. Swopes

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