Korolev and the R-7

The words

1. Ballistic

   Following a largely unpowered path governed mainly by gravity.

   The R-7 began as a missile intended to carry a warhead toward a distant target. Its military development provided the rocket later adapted to launch Sputnik.

   Harford: R-7 tests and Sputnik (opens a new tab) · NASA Glenn: meaning of ballistic (opens a new tab)

2. Boosters

   The R-7 had four side boosters around a central core. They fired together at liftoff, giving the rocket its distinctive clustered form.

   p. 108 · Siddiqi: R-7 boosters and engines (opens a new tab)

3. Chief Designer

   Chief Designer was the public title used for Korolev while his name stayed secret. It described responsibility for rocket-space systems, distinguishing him from Glushko’s engine-design role.

   Siddiqi: Korolev and Sputnik (opens a new tab)

4. Design Bureau

   Korolev’s group became Experimental Design Bureau No. 1, or OKB-1. It developed military missiles before its R-7 work provided the basis for satellite launches.

   Siddiqi: Korolev and Sputnik (opens a new tab)

5. Glushko

   Valentin Glushko’s bureau developed the R-7’s engines. Like Korolev, he had been imprisoned during Stalin’s purges; both later held central roles in the Soviet space program.

   pp. 129–130 · Siddiqi: R-7 boosters and engines (opens a new tab) · ESA: Korolev and Stalin’s purges (opens a new tab)

6. Kamchatka

   Kamchatka was the target region for the R-7’s long-range test flight on August 21, 1957. The flight carried a dummy warhead before the rocket’s satellite-launching role began.

   Harford: R-7 tests and Sputnik (opens a new tab)

7. Kerosene

   Kerosene was the R-7’s fuel, burned with liquid oxygen. This pairing powered the early satellite launcher and later members of the rocket family.

   Siddiqi: Korolev and Sputnik (opens a new tab) · ESA: Semyorka and its later flight (opens a new tab)

8. Korolev

   Sergei Korolev led Soviet work that produced the R-7 and Sputnik. During Stalin’s purges, he had been imprisoned in a labor camp and later put to work in a prison design bureau.

   ESA: Korolev and Stalin’s purges (opens a new tab)

9. Launch Pad

   Sputnik’s rocket was assembled in a hangar and rolled to the launch pad. The installation served a missile program that had also taken on a satellite mission.

   Harford: R-7 tests and Sputnik (opens a new tab)

10. Semyorka

    A Russian nickname meaning “Little Seven.”

    Semyorka was the R-7 family’s familiar nickname. The name stayed with the rocket as its role expanded from carrying a nuclear warhead to launching satellites and a human spacecraft.

    ESA: Semyorka and its later flight (opens a new tab)

11. Testing

    Early R-7 launches failed before the successful August 1957 test. Korolev’s team then used that capability to press ahead with the first satellite launch.

    Harford: R-7 tests and Sputnik (opens a new tab)

12. Thermonuclear

    Relating to a hydrogen bomb.

    The R-7 was designed to carry a heavy hydrogen-bomb warhead. That military requirement gave its designers a rocket powerful enough to carry a scientific satellite instead.

    Harford: R-7 tests and Sputnik (opens a new tab)

13. Tsiolkovsky

    Konstantin Tsiolkovsky was an earlier spaceflight thinker whose birth centenary fell in 1957. Korolev’s group hoped to mark the anniversary with a satellite launch, but was not ready.

    Did you know?

    Korolev and Glushko attended Tsiolkovsky’s centenary celebration in Moscow on September 17, 1957, while preparations for Sputnik’s launch were still unfinished.

    Siddiqi: Korolev and Sputnik (opens a new tab)

14. Turbine

    A turbine failure cut the R-7’s main engine off early during Sputnik 1’s launch. The satellite still separated successfully and entered orbit.

    Siddiqi: Korolev and Sputnik (opens a new tab)

15. Warhead

    The R-7’s original payload was intended as a weapon. The August 21, 1957 test instead carried a dummy warhead toward Kamchatka, testing the missile without a live hydrogen bomb.

    Harford: R-7 tests and Sputnik (opens a new tab)