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astronomy

Robert Truax

Robert Truax is a astronomy 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 Robert Truax rather than just read about it. In short: Captain Robert C. Truax (USN) (September 3, 1917 – September 17, 2010) was an American rocket engineer in the United States Navy, and companies such as Aerojet and Truax Engineering, which he founded.

Robert Truax — main illustration
Robert Truax — illustration

Key takeaways

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

Reference excerpt

Captain Robert C. Truax (USN) (September 3, 1917 – September 17, 2010) was an American rocket engineer in the United States Navy, and companies such as Aerojet and Truax Engineering, which he founded. Truax was a proponent of low-cost rocket engine and vehicle designs.

Life As a teenager, Truax was inspired by Robert Goddard articles in Popular Mechanics magazine to build his own rockets while residing in Alameda, California. From 1936 to 1939, midshipman Truax tested liquid-fuel rocket motors and published a February 1939 report in Astronautics. In 1938, he showed a thrust chamber that he had constructed to the British Interplanetary Society and wrote technical reports published by the American Rocket Society. Following two years' sea duty, first on USS Enterprise (CV-6) and then a destroyer, then-Lieutenant Commander Truax worked at the Engineering Experiment Station at Annapolis in the Bureau of Aeronautics Ship Installations Division under Commander C. A. Bolster. Truax headed the Navy Development Project (ensigns R. C. Stiff, J. F. Patton, W. Schubert and MIT civilian Robertson Youngquist), where hypergolic propellant was discovered—fuel that burst into flame spontaneously when brought into contact with nitric acid, leading to the use of aniline plus 20% furfuryl alcohol for the 1945 WAC Corporal (the first free-flight rocket to use the fuel). By early 1943, the Truax group had developed a 1,500 lbf (6.7 kN) thrust JATO using hypergolic fuel before the introduction of solid fuel JATO units.

From 1955 to 1958, Truax was assigned to the United States Air Force under General Bernard A. Schriever, where Truax and Dr. Adolf Thiel headed the initial design studies and IRBM specifications for the PGM-17 Thor missile. Truax subsequently worked on the Navy's Viking rocket and UGM-27 Polaris missile. Truax studied the sea launching of rockets, such as the Sea Bee and Sea Horse projects. After serving as 1957 American Rocket Society president, Truax retired from the United States Navy in 1959 and headed the Aerojet-General Advanced Development Division and Aerojet's Sea Dragon project. Truax died from prostate cancer at his home in Valley Center, California on September 17, 2010.

Truax Engineering In 1966 Robert Truax founded Truax Engineering, which studied sea launch concepts similar to the earlier Sea Dragon—the Excalibur, the SEALAR, and the Excalibur S. Truax also designed the Skycycle X-2, which he unsuccessfully tested on April 15, 1972, and June 24, 1973, and which Evel Knievel unsuccessfully used at the Snake River Canyon in 1974.

Volksrocket

The X-3 Volksrocket (other names: Arriba One, Skycycle X-3) was a reusable space tourism rocket planned by Robert Truax after Evel Knievel provided a $1,000 research grant for a pilot study. Truax was looking for volunteers with enough money to help fund the effort and who wished to fly aboard his rocket. He got thousands of volunteers, but few of them had the financial resources. One person selected to fly in the rocket was engineer Jeana Yeager, who worked for Truax Engineering. Peruvian-born Daniel J. Correa was at one point announced as the first pilot. Among others who offered some financing and who went through some of his training were Ronald Beller, a pilot from Kentucky, Martin Yahn, Ray Upton, and Fell Peters, all of southern California. Ultimately, no one flew in the Volksrocket. The rocket used surplus components and was tested through 1991.

References and notes

External links Truax Transportation Collection

Illustrations

Robert Truax illustration
Robert Truax: 1955 Project Orbiter meeting
1955 Project Orbiter meeting

Worked examples

Example 1 — a first encounter with Robert Truax

Start with the simplest possible case. Write down what Robert Truax claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Robert Truax 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 Robert Truax 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 Robert Truax

In research
Robert Truax appears in astronomy 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 Robert Truax 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
Robert Truax is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1917 births, 2010 deaths, American aerospace engineers, so understanding it makes those chapters shorter.
In everyday life
Look for Robert Truax 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 Robert Truax in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Robert Truax 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 Robert Truax out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Robert Truax in simple terms?

Captain Robert C. Truax (USN) (September 3, 1917 – September 17, 2010) was an American rocket engineer in the United States Navy, and companies such as Aerojet and Truax Engineering, which he founded.

Why does Robert Truax matter?

Because it connects several astronomy 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 Robert Truax?

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 Robert Truax.

Tags

  • 1917 births
  • 2010 deaths
  • American aerospace engineers
  • American rocket scientists
  • Deaths from prostate cancer in California
  • Humboldt University of Berlin alumni
  • Iowa State University alumni
  • Members of the American Rocket Society
  • Military personnel from Alameda County, California
  • Military personnel from San Diego County, California
  • Naval Postgraduate School alumni
  • People from Alameda, California

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