The Luna 8K72 vehicles were

carrier rocket A launch vehicle or carrier rocket is a rocket designed to carry a payload (spacecraft or satellites) from the Earth's surface to outer space. Most launch vehicles operate from a launch pad, launch pads, supported by a missile launch contro ...

s used by the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...

for nine

space probe A space probe is an artificial satellite that travels through space to collect scientific data. A space probe may orbit Earth; approach the Moon; travel through interplanetary space; flyby, orbit, or land or fly on other planetary bodies; or ent ...

launch attempts in the

Luna programme The Luna programme (from the Russian word "Luna" meaning "Moon"), occasionally called ''Lunik'' by western media, was a series of robotic spacecraft missions sent to the Moon by the Soviet Union between 1959 and 1976. Fifteen were successful, ...

between 23 September 1958 and 16 April 1960. Like many other Soviet launchers of that era the Luna 8K72 vehicles were derived from the R-7 Semyorka design, part of the

R-7 (rocket family) The R-7 family of rockets (russian: Р-7) is a series of rockets, derived from the Soviet R-7 Semyorka, the world's first ICBM. More R-7 rockets have been launched than any other family of large rockets. When Soviet nuclear warheads became ligh ...

, which was also the basis for the

Vostok Vostok refers to east in Russian but may also refer to: Spaceflight * Vostok programme, Soviet human spaceflight project * Vostok (spacecraft), a type of spacecraft built by the Soviet Union * Vostok (rocket family), family of rockets derived from ...

and modern

Soyuz rocket The Soyuz (russian: Союз, meaning "union", GRAU index 11A511) was a Soviet expendable carrier rocket designed in the 1960s by OKB-1 and manufactured by State Aviation Plant No. 1 in Kuybyshev, Soviet Union. It was commissioned to launch ...

. The first flight of a Luna 8K72 (September 1958), which was to launch the Luna E-1 No.1 probe, ended 92 seconds after launch when the rocket broke up from longitudinal ("pogo") oscillations, causing the strap-ons to separate from the vehicle, which then crashed downrange. The second flight of a Luna 8K72 (October 1958), which was to launch the

Luna E-1 No.2 Luna E-1 No.2, sometimes identified by NASA as Luna 1958B, was a Soviet spacecraft which was lost in a launch failure in 1958. It was a Luna E-1 spacecraft, the second of four to be launched, all of which were involved in launch failures. It was ...

probe, ended 104 seconds after launch when the rocket again disintegrated from vibration. The third flight of a Luna 8K72 (December 1958), which was to launch the Luna E-1 No.3 probe, ended 245 seconds after launch when the Block A core stage shut down from loss of engine lubricant. The resonant vibration problem suffered by the 8K72 booster was the cause of a major argument between the Korolev and Glushko design bureaus. It was believed that the vibrations developed as a consequence of adding the Block E upper stage to the R-7, shifting its

center of mass In physics, the center of mass of a distribution of mass in space (sometimes referred to as the balance point) is the unique point where the weighted relative position of the distributed mass sums to zero. This is the point to which a force may ...

Luna 1

The first probe launched by a Luna 8K72 to reach orbit was

Luna 1 ''Luna 1'', also known as ''Mechta'' (russian: Мечта , '' lit.'': ''Dream''), ''E-1 No.4'' and ''First Lunar Rover'', was the first spacecraft to reach the vicinity of Earth's Moon, and the first spacecraft to be placed in heliocentric or ...

, launched 2 January 1959, which was intended as a lunar impactor mission. Luna 1 instead passed within of the Moon's surface 4 January 1959, and then went into orbit around the Sun between the orbits of Earth and Mars. The fifth flight of a Luna 8K72 (18 June 1959) ended 153 seconds after launch due to a guidance malfunction of the Blok A core stage, leading to engine shutdown.

Luna 2

Luna 2 was launched by a Luna 8K72 12 September 1959. It was the first spacecraft to impact the lunar surface.

Luna 3

The final successful launch of a Luna 8K72 took place 4 October 1959. The

Luna 3 Luna 3, or E-2A No.1 ( rus, Луна 3}) was a Soviet spacecraft launched in 1959 as part of the Luna programme. It was the first mission to photograph the far side of the Moon and the third Soviet space probe to be sent to the neighborhood of th ...

spacecraft took the first photographs of the far side of the Moon. The eighth flight of a Luna 8K72 (March 1960) ended 435 seconds after launch when the Blok E upper stage developed insufficient thrust, causing the Luna probe to reenter the atmosphere and burn up. The ninth flight of a Luna 8K72 (April 1960) failed when the Blok G strap-on booster developed only 75% thrust at liftoff, breaking away from the launch vehicle, which then disintegrated, the strap-ons flying in random directions and exploding as they impacted the ground. The Blok A core stage then crashed into a salt lake.

References

{{R-7 rockets 1958 in spaceflight 1959 in spaceflight

rocket A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely fr ...

Space launch vehicles of the Soviet Union R-7 (rocket family)