11 April 1975: “The only time the five ship fleet of NASA Dryden’s F-104 Starfighters was ever airborne at the same time. Pilots were: F-104N #811-Bill Dana; F-104N #812-Tom McMurtry; F-104A #818-Einar Enevoldson; F-104A #820-Gary Krier; and F-104B #819-Fitz Fulton and Ray Young. Photo taken from T-38 #821 flown by Don Mallick.”by
11 April 1970: At 2:13:00 p.m., Eastern Standard Time, Apollo 13 was launched from Launch Complex 39A at the Kennedy Space Center, Cape Canaveral, Florida. This mission was planned to be the third manned lunar landing. The destination was the Fra Mauro Highlands. In command was Captain James A. Lovell, Jr., United States Navy. The Command Module Pilot was John L. “Jack” Swigert, Jr. (who was originally scheduled as the backup CSM pilot, but had replaced Lieutenant Commander T. Kenneth Mattingly II, USN, just three days before launch). and the Lunar Module Pilot was Fred W. Haise, Jr., A NASA astronaut (formerly a U.S. Marine Corps and U.S. Air Force fighter pilot, test pilot and instructor).
The crew change had been made because it was believed that Ken Mattingly had been exposed to measles and NASA administrators did not want to risk that he might become ill during the flight.
At T + 000:05:30.64, while accelerating toward Earth orbit, the center J-2 engine on the Saturn S-II second stage shut down 2 minutes, 12.36 seconds early, which required the other four engines to increase their burn by 34.53 seconds, and the S-IVB third stage engine had to burn 9 seconds seconds longer than planned to achieve the necessary velocity for orbital insertion.
The Apollo 13 mission did not go as planned. An explosion inside the service module was a very near disaster, and the lunar landing had to be aborted. Returning the three astronauts safely to Earth became the primary task.
The Saturn V rocket was a three-stage, liquid-fueled heavy launch vehicle. Fully assembled with the Apollo Command and Service Module, it stood 363 feet (110.642 meters) tall. The first and second stages were 33 feet (10.058 meters) in diameter. Fully loaded and fueled the rocket weighed 6,200,000 pounds (2,948,350 kilograms). It could lift a payload of 260,000 pounds (117,934 kilograms) to Low Earth Orbit.
The first stage was designated S-IC. It was designed to lift the entire rocket to an altitude of 220,000 feet (67,056 meters) and accelerate to a speed of more than 5,100 miles per hour (8,280 kilometers per hour). The S-IC stage was built by Boeing at the Michoud Assembly Facility, New Orleans, Louisiana. It was 138 feet (42.062 meters) tall and had an empty weight of 290,000 pounds (131,542 kilograms). Fully fueled with 203,400 gallons (770,000 liters) of RP-1 and 318,065 gallons (1,204,000 liters) of liquid oxygen, the stage weighed 5,100,000 pounds (2,131,322 kilograms). It was propelled by five Rocketdyne F-1 engines, producing 1,522,000 pounds of thrust, each, for a total of 7,610,000 pounds of thrust at Sea Level. These engines were ignited seven seconds prior to lift off and the outer four burned for 168 seconds. The center engine was shut down after 142 seconds to reduce the rate of acceleration. The F-1 engines were built by the Rocketdyne Division of North American Aviation at Canoga Park, California.
The S-II second stage was built by North American Aviation at Seal Beach, California. It was 81 feet, 7 inches (24.87 meters) tall and had the same diameter as the first stage. The second stage weighed 80,000 pounds (36,000 kilograms) empty and 1,060,000 pounds loaded. The propellant for the S-II was liquid hydrogen and liquid oxygen. The stage was powered by five Rocketdyne J-2 engines, also built at Canoga Park. Each engine produced 232,250 pounds of thrust, and combined, 1,161,250 pounds of thrust.
The Saturn V third stage was designated S-IVB. It was built by Douglas Aircraft Company at Huntington Beach, California. The S-IVB was 58 feet, 7 inches (17.86 meters) tall with a diameter of 21 feet, 8 inches (6.604 meters). It had a dry weight of 23,000 pounds (10,000 kilograms) and fully fueled weighed 262,000 pounds. The third stage had one J-2 engine and also used liquid hydrogen and liquid oxygen for propellant. The S-IVB wou place the Command and Service Module into Low Earth Orbit, then, when all was ready, the J-2 would be restarted for the Trans Lunar Injection.
Eighteen Saturn V rockets were built. They were the most powerful machines ever built by man.
© 2017, Bryan R. Swopesby
The President of the United States of America, authorized by Act of Congress, March 3, 1863 has awarded in the name of the Congress the Medal of Honor posthumously to:
A1C WILLIAM H. PITSENBARGER
UNITED STATES AIR FORCE
for conspicuous gallantry and intrepidity in action at the risk of his life above and beyond the call of duty Near Cam My, 11 April 1966:
Rank and organization: Airman First Class, U.S. Air Force, Detachment 6, 38th Aerospace Rescue and Recovery Squadron, Bien Hoa Air Base, Republic of Vietnam.
Place and date: Near Cam My, 11 April 1966
Entered service at: Piqua, Ohio
Born: 8 July 1944, Piqua, Ohio
Citation: Airman First Class Pitsenbarger distinguished himself by extreme valor on 11 April 1966 near Cam My, Republic of Vietnam, while assigned as a Pararescue Crew Member, Detachment 6, 38th Aerospace Rescue and Recovery Squadron. On that date, Airman Pitsenbarger was aboard a rescue helicopter responding to a call for evacuation of casualties incurred in an on-going firefight between elements of the United States Army’s 1st Infantry Division and a sizable enemy force approximately 35 miles east of Saigon. With complete disregard for personal safety, Airman Pitsenbarger volunteered to ride a hoist more than one hundred feet through the jungle, to the ground. On the ground, he organized and coordinated rescue efforts, cared for the wounded, prepared casualties for evacuation, and insured that the recovery operation continued in a smooth and orderly fashion. Through his personal efforts, the evacuation of the wounded was greatly expedited. As each of the nine casualties evacuated that day were recovered, Pitsenbarger refused evacuation in order to get one more wounded soldier to safety. After several pick-ups, one of the two rescue helicopters involved in the evacuation was struck by heavy enemy ground fire and was forced to leave the scene for an emergency landing. Airman Pitsenbarger stayed behind, on the ground, to perform medical duties. Shortly thereafter, the area came under sniper and mortar fire. During a subsequent attempt to evacuate the site, American forces came under heavy assault by a large Viet Cong force. When the enemy launched the assault, the evacuation was called off and Airman Pitsenbarger took up arms with the besieged infantrymen. He courageously resisted the enemy, braving intense gunfire to gather and distribute vital ammunition to American defenders. As the battle raged on, he repeatedly exposed himself to enemy fire to care for the wounded, pull them out of the line of fire, and return fire whenever he could, during which time, he was wounded three times. Despite his wounds, he valiantly fought on, simultaneously treating as many wounded as possible. In the vicious fighting which followed, the American forces suffered 80 percent casualties as their perimeter was breached, and airman Pitsenbarger was finally fatally wounded. Airman Pitsenbarger exposed himself to almost certain death by staying on the ground, and perished while saving the lives of wounded infantrymen. His bravery and determination exemplify the highest professional standards and traditions of military service and reflect great credit upon himself, his unit, and the United States Air Force.
© 2017, Bryan R. Swopesby
11 April 1952: At the Piasecki Helicopter Corporation factory at Morton Grove, Pennsylvania, the first YH-21 tandem-rotor helicopter, serial number 50-1231, made it’s first flight. The test pilots were Leonard Joseph (“Len”) LaVassar and Martin P. (“Marty”) Johnson, both former U.S. Navy aviators.
The Piasecki Helicopter Corporation built 18 pre-production YH-21-PH helicopters, followed by three production variants, the H-21A, H-21B and H-21C.
The U.S. Air Force immediately ordered 32 H-21A helicopters for Search and Rescue operations. The Workhorse was well suited to cold weather operations and it was widely used in Alaska, Canada, and the Antarctic. Another 163 H-21B models were ordered as a troop transports. The U.S. Army ordered a similar H-21C variant.
The H-21 was normally operated by two pilots, with a flight mechanic (crew chief), and could carry up to 20 soldiers under ideal conditions. With rotors turning, the ship’s overall length was 86 feet, 4 inches (26.314 meters). The fuselage was 52 feet, 7 inches (16.027 meters) long, and it was 15 feet, 9 inches (4.801 meters) high. Each three-bladed rotor had a diameter of 44 feet, 0 inches (13.411 meters). The angle in the fuselage was intended to provide adequate vertical clearance between the intermeshing fore and aft rotor assemblies. (Later tandem rotor helicopters use raised pylons.) The H-21C had an empty weight was 8,950 pounds (4,060 kilograms) and maximum takeoff weight was 15,200 pounds (6,895 kilograms).
The H-21 was powered by a single air-cooled, supercharged, 1,823.129-cubic-inch-displacement (29.875 liter) Wright Aeronautical Division Cyclone 9 863C9WD1 (R-1820-103) nine-cylinder radial, mounted inside the fuselage at midship, and drove the front and rear rotors in opposite directions through drive shafts and gear boxes.
The forward rotor turned counter-clockwise, as seen from above. (The advancing blade is on the helicopter’s right side.) The rear rotor turns the opposite direction. Normal operating speed for the main rotors was approximately 250 r.p.m. The counter-rotating rotors cancelled out engine torque, eliminating any need for a tail rotor. The angle in the fuselage was intended to provide adequate vertical clearance between the intermeshing fore and aft rotor assemblies. (Later tandem rotor helicopters use raised pylons.)
The Wright R-1820-103 engine was rated at 1,275 horsepower at 2,500 r.p.m., and 1,425 horsepower at 2,700 r.p.m., for takeoff. This direct-drive engine had a compression ratio of 6.80:1 and required 100/130 aviation gasoline. The engine was 4 feet, 0.50 inches (1.232 meters) long, 4 feet, 6.95 inches (1.396 meters) in diameter, and weighed 1,350 pounds (612 kilograms). Wright built 971 R-1820-103s from November 1950 through 1957.
The CH-21C had a maximum speed of 127 miles per hour (204 kilometers per hour) and a range of 265 miles (427 kilometers). Its service ceiling was 19,200 feet (5,852 meters).
In 1955, Piasecki became Vertol and eventually Boeing Vertol. The company would continue to produce tandem rotor helicopters such as the H-46 Sea Knight and the CH-47 Chinook, which is still in production.
© 2017, Bryan R. Swopesby
MEDAL OF HONOR
First Lieutenant Edward Stanley Michael
United States Army Air Forces
Rank: First Lieutenant, U.S. Army Air Corps
Organization: 364th Bombardment Squadron, 305th Bombardment Group (H), 8th Air Force
Place and Date: Over Germany, 11 April 1944
Entered Service: Chicago
Born: 2 May 1918, Chicago, Ill.
General Orders: War Department. General Orders No. 5. January 15, 1945
Citation: The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to First Lieutenant (Air Corps) Edward Stanley Michael, United States Army Air Forces, for conspicuous gallantry and intrepidity above and beyond the call of duty while serving as pilot of a B-17 aircraft on a heavy bombardment mission to Germany, April 11, 1944. The group in which 1st Lt. Michael was flying was attacked by a swarm of fighters. His plane was singled out and the fighters pressed their attacks home recklessly, completely disregarding the Allied fighter escort and their own intense flak. His plane was riddled from nose to tail with exploding cannon shells and knocked out of formation, with a large number of fighters following it down, blasting it with cannon fire as it descended. A cannon shell exploded in the cockpit, wounded the copilot, wrecked the instruments, and blew out the side window. 1st Lt. Michael was seriously and painfully wounded in the right thigh. Hydraulic fluid filmed over the windshield making visibility impossible, and smoke filled the cockpit. The controls failed to respond and 3,000 feet were lost before he succeeded in leveling off. The radio operator informed him that the whole bomb bay was in flames as a result of the explosion of 3 cannon shells, which had ignited the incendiaries. With a full load of incendiaries in the bomb bay and a considerable gas load in the tanks, the danger of fire enveloping the plane and the tanks exploding seemed imminent. When the emergency release lever failed to function, 1st Lt. Michael at once gave the order to bail out and 7 of the crew left the plane. Seeing the bombardier firing the navigator’s gun at the enemy planes, 1st Lt. Michael ordered him to bail out as the plane was liable to explode any minute. When the bombardier looked for his parachute he found that it had been riddled with 20mm fragments and was useless. 1st Lt. Michael, seeing the ruined parachute, realized that if the plane was abandoned the bombardier would perish and decided that the only chance would be a crash landing. Completely disregarding his own painful and profusely bleeding wounds, but thinking only of the safety of the remaining crewmembers, he gallantly evaded the enemy, using violent evasive action despite the battered condition of his plane. After the plane had been under sustained enemy attack for fully 45 minutes, 1st Lt. Michael finally lost the persistent fighters in a cloud bank. Upon emerging, an accurate barrage of flak caused him to come down to treetop level where flak towers poured a continuous rain of fire on the plane. He continued into France, realizing that at any moment a crash landing might have to be attempted, but trying to get as far as possible to increase the escape possibilities if a safe landing could be achieved. 1st Lt. Michael flew the plane until he became exhausted from the loss of blood, which had formed on the floor in pools, and he lost consciousness. The copilot succeeded in reaching England and sighted an RAF field near the coast. 1st Lt. Michael finally regained consciousness and insisted upon taking over the controls to land the plane. The undercarriage was useless; the bomb bay doors were jammed open; the hydraulic system and altimeter were shot out. In addition, there was no airspeed indicator, the ball turret was jammed with the guns pointing downward, and the flaps would not respond. Despite these apparently insurmountable obstacles, he landed the plane without mishap.
© 2015, Bryan R. Swopesby