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Jack Swigert

Jack Swigert is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Jack Swigert rather than just read about it. In short: John Leonard Swigert Jr. (August 30, 1931 – December 27, 1982) was an American NASA astronaut, test pilot, mechanical engineer, aerospace engineer, United States Air Force pilot, and politician.

Jack Swigert — main illustration
Jack Swigert — illustration

Key takeaways

  • Jack Swigert belongs to engineering; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Jack Swigert to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Jack Swigert from memory before moving on to harder problems.

Reference excerpt

John Leonard Swigert Jr. (August 30, 1931 – December 27, 1982) was an American NASA astronaut, test pilot, mechanical engineer, aerospace engineer, United States Air Force pilot, and politician. In April 1970, as command module pilot of Apollo 13, he became one of 24 Apollo astronauts who reached the Moon. Due to the "slingshot" route around the Moon they chose to safely return to Earth, the Apollo 13 astronauts flew farther away from Earth than any other astronauts until the Artemis II lunar flyby in 2026, though they had to abort the Moon landing. Before joining NASA in 1966, Swigert was a civilian test pilot and fighter pilot in the Air National Guard. After leaving NASA, he ran to represent Colorado in the U.S. Senate but lost in a primary election against Bill Armstrong. He subsequently was elected to represent Colorado's 6th congressional district in the U.S. House of Representatives in 1982, but died of cancer before being sworn into office.

Early life John Leonard Swigert Jr. was born on August 30, 1931, in Denver, Colorado, to parents Dr. John Leonard Swigert Sr. and Virginia Anne Swigert (née Seep). Swigert's father was an ophthalmologist. At the age of 14, he became fascinated by aviation. While he would have been content just watching planes take off from nearby Combs Field, young Jack became determined to do more than be a spectator. He took on a newspaper route to earn money for flying lessons, and by age 16 he was a licensed private pilot. He was a member of the Boy Scouts of America and attained the rank of Second Class Scout. He attended Blessed Sacrament School, Regis Jesuit High School and East High School, from which he graduated in 1949. Swigert received a Bachelor of Science degree in mechanical engineering from University of Colorado in 1953, where he also played football for the Buffaloes. He later earned a Master of Science degree in aerospace engineering from Rensselaer Polytechnic Institute (Hartford campus) in 1965, and a Master of Business Administration degree from University of Hartford in 1967. His recreational interests included golf, handball, bowling, skiing, swimming, and basketball. His hobbies included photography.

Flight experience

Following his graduation from Colorado in 1953, Swigert joined the United States Air Force (USAF). Upon graduation from the Pilot Training Program and Gunnery School at Nellis Air Force Base, Nevada, he was assigned as a fighter pilot in Japan and South Korea. In 1953, he survived his plane crashing into a radar unit on a Korean airstrip. After completing his tour of active duty in the USAF, he served as a jet fighter pilot with the Massachusetts (1957–1960) and Connecticut Air National Guard (1960–1965). Swigert held a position as engineering test pilot for North American Aviation before joining NASA. He was previously an engineering test pilot for Pratt & Whitney, from February 1957 to June 1964. He logged over 7,200 hours in flight, including more than 5,725 hours in jet aircraft.

NASA career After unsuccessfully applying for NASA's second and third astronaut selections, Swigert was accepted into the NASA Astronaut Corps as part of NASA Astronaut Group 5 in April 1966. Swigert became a specialist on the Apollo command module: he was one of the few astronauts who requested to be command module pilots. Swigert was a member of Apollo 7's astronaut support crew, the first support crew for an Apollo mission; he served as capsule communicator (CAPCOM) during the ascent phase of the flight.

Apollo 13

Swigert was one of three astronauts aboard the Apollo 13 Moon mission launched April 11, 1970. Originally part of the backup crew for the mission, he was assigned to the mission three days before launch, replacing astronaut Ken Mattingly. The prime crew had been exposed to German measles (the rubella virus) from Charles Duke and, because Mattingly had no immunity to the disease, NASA did not want to risk him falling ill during critical phases of the flight. Apollo 13 was the third crewed lunar-landing attempt, but was aborted after the rupture of an oxygen tank in the spacecraft's service module. Swigert was the astronaut who first announced, "Houston, we've had a problem here". The statement was then repeated by commander of the flight Jim Lovell. Swigert, along with fellow astronauts Lovell and Fred Haise, traveled around the Moon and returned safely to Earth on April 17 after about 5 days and 23 hours, and received the Presidential Medal of Freedom the next day.

Apollo–Soyuz Test Project NASA Director of Flight Crew Operations Deke Slayton, who selected the astronauts, recommended Swigert as command module pilot for the Apollo–Soyuz Test Project, the first joint mission with the Soviet Union. Slayton felt Swigert deserved another chance to fly after having been selected for Apollo 13 two days before launch, and performing well. During 1972, the Apollo 15 postal covers incident caused NASA investigators to inquire into other astronauts. A number of Apollo astronauts, including Swigert, had made agreements with West German stamp dealer Hermann Sieger, who originated the idea for the Apollo 15 covers, to autograph philatelic items in exchange for a payment of about $2,500. Swigert originally denied involvement when interviewed by NASA investigators. According to Christopher C. Kraft, the investigators subpoenaed his bank records, finding more funds than expected, and records of a predated charitable donation. Swigert's subsequent admission caused NASA Deputy Administrator George M. Low to remove him from Apollo–Soyuz.

… excerpt ends here. Continue reading the full article.

Illustrations

Jack Swigert illustration
Jack Swigert illustration
Jack Swigert: Swigert wearing his Air Force flight suit with a 118th Fighter Squadron, Connecticut Air National Guard patch
Swigert wearing his Air Force flight suit with a 118th Fighter Squadron, Connecticut Air National Guard patch
Jack Swigert: Swigert (right) with the "mailbox" rig improvised to adapt the Apollo 13 command module Odyssey's square carbon dioxide scrubber cartridges to fit the Apollo Lunar Module Aquarius, which took a round cartridge
Swigert (right) with the "mailbox" rig improvised to adapt the Apollo 13 command module Odyssey's square carbon dioxide scrubber cartridges to fit the Apollo Lunar Module Aquarius, which took a round cartridge
Jack Swigert: Swigert during suit-up before the launch of Apollo 13, April 11, 1970
Swigert during suit-up before the launch of Apollo 13, April 11, 1970

Worked examples

Example 1 — a first encounter with Jack Swigert

Start with the simplest possible case. Write down what Jack Swigert claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Jack Swigert before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Jack Swigert ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Jack Swigert

In research
Jack Swigert appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Jack Swigert in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Jack Swigert is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1931 births, 1970 in spaceflight, 1982 deaths, so understanding it makes those chapters shorter.
In everyday life
Look for Jack Swigert outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Jack Swigert in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Jack Swigert means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Jack Swigert out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Jack Swigert in simple terms?

John Leonard Swigert Jr. (August 30, 1931 – December 27, 1982) was an American NASA astronaut, test pilot, mechanical engineer, aerospace engineer, United States Air Force pilot, and politician.

Why does Jack Swigert matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Jack Swigert?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Jack Swigert.

Tags

  • 1931 births
  • 1970 in spaceflight
  • 1982 deaths
  • 20th-century American businesspeople
  • 20th-century American mechanical engineers
  • 20th-century United States representatives
  • American aerospace engineers
  • American astronaut-politicians
  • American business executives
  • American people of German descent
  • American test pilots
  • Apollo 13

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