Function | Satellite launch vehicle |
---|---|
Manufacturer | Glenn L. Martin Company |
Country of origin | United States |
Size | |
Height | 21.9 meters (72 ft) |
Diameter | 1.14 meters (3 ft 9 in) |
Mass | 10,050 kilograms (22,160 lb) |
Stages | 3 |
Capacity | |
Payload to LEO | |
Mass | 11.3 kg (25 lb) |
Launch history | |
Status | Retired |
Launch sites | Cape Canaveral, LC-18A |
Total launches | 11 |
Success(es) | 3 |
Failure(s) | 8 |
First flight | 23 October 1957 (Vanguard 1: 17 March 1958) |
Last flight | 18 September 1959 |
First stage – Vanguard | |
Height | 13.4 m (44 ft) |
Diameter | 1.14 m (3 ft 9 in) |
Empty mass | 811 kg (1,788 lb) |
Gross mass | 8,090 kg (17,840 lb) |
Powered by | 1 General Electric GE X-405 |
Maximum thrust | 125,000 N (28,000 lbf) |
Specific impulse | 248 s (2.43 km/s) |
Burn time | 144 seconds |
Propellant | LOX / Kerosene (RP-1) |
Second stage –Delta | |
Height | 5.8 m (19 ft) |
Diameter | 0.8 m (2 ft 7 in) |
Empty mass | 694 kg (1,530 lb) |
Gross mass | 1,990 kg (4,390 lb) |
Powered by | 1 Aerojet General AJ10-37 |
Maximum thrust | 32,600 N (7,300 lbf) |
Specific impulse | 261 s (2.56 km/s) |
Burn time | 120 seconds |
Propellant | UDMH / Nitric acid (IWFNA) |
Third stage –Grand Central Rocket Company | |
Height | 1.5 m (4 ft 11 in) |
Diameter | 0.8 m (2 ft 7 in) |
Empty mass | 31 kg (68 lb) |
Gross mass | 194 kg (428 lb) |
Powered by | 1 33KS2800 |
Maximum thrust | 10,400 N (2,300 lbf) |
Specific impulse | 238 s (2.33 km/s) [1] : 151 |
Burn time | 33 seconds [1] : 151 |
Propellant | Polysulfide/AP (APCP) |
Third stage (SLV-7) –Allegany Ballistics Laboratory | |
Height | 1.5 m (4 ft 11 in) |
Diameter | 0.8 m (2 ft 7 in) |
Empty mass | 23 kg (51 lb) [1] : 151 |
Gross mass | 229 kg (505 lb) [1] : 151 |
Powered by | 1 X248 |
Maximum thrust | 10,400 N (2,300 lbf) |
Specific impulse | 251 s (2.46 km/s) [1] : 151 |
Burn time | 38 seconds [1] : 151 |
Propellant | Solid double base propellant |
The Vanguard rocket [1] was intended to be the first launch vehicle the United States would use to place a satellite into orbit. Instead,the Sputnik crisis caused by the surprise launch of Sputnik 1 led the U.S.,after the failure of Vanguard TV-3,to quickly orbit the Explorer 1 satellite using a Juno I rocket,making Vanguard 1 the second successful U.S. orbital launch.
Vanguard rockets were used by Project Vanguard from 1957 to 1959. Of the eleven Vanguard rockets which the project attempted to launch,three successfully placed satellites into orbit. Vanguard rockets were an important part of the Space Race between the United States and the Soviet Union.
In 1955,the United States announced plans to put a scientific satellite in orbit for the International Geophysical Year (IGY) in 1957–1958. The goal was to track the satellite as it performed experiments. [2] At that time,there were three candidates for the launch vehicle:The Air Force's SM-65 Atlas,a derivative of the Army Ballistic Missile Agency's SSM-A-14 Redstone,and a Navy proposal for a three-stage rocket based on the RTV-N-12a Viking sounding rocket. [3] [4]
The RAND Corporation,Air Force and CIA had long pursued the idea of a reconnaissance satellite. [5] Such a program was under way,Weapon System 117L,which was top secret compartmented. [6] One problem with reconnaissance was the question of legality:Was there "freedom of space" or did a nation's airspace end when space is entered? [2] The National Security Council backed the IGY satellite because it would make good cover for WS117L and set a precedent of freedom of space peaceful civilian satellite. At the same time the NSC stressed that the IGY satellite must not interfere with military programs. [7] The Army's Redstone-based proposal would likely be the first one ready for a satellite launch. Its connection with German-born scientist Wernher von Braun,however,was a public-relations risk. [8] [4] In any case,the Atlas and Redstone ballistic missiles were top-priority military projects,which were not to be hindered by pursuing a secondary space launch mission. [9] Milton Rosen's Vanguard was a project at the Naval Research Laboratory (NRL),which was regarded more as a scientific than a military organization. Rosen and Richard Porter (IGY satellite chief and head of the American Rocket Society) both lobbied for the Vanguard and against using the Atlas or von Braun's rockets. [10] They emphasized the non-military goals of the satellite program. Besides the public-relations aspect,a non-military satellite was considered important,because a discussion of whether overflights of foreign countries by satellites were legal or illegal was to be avoided. [11]
In August or September 1955,the DOD Committee on Special Capabilities chose the NRL proposal,named Vanguard,for the IGY project. The Martin company,which had also built the Viking,became prime contractor for the launch vehicle. [12] The Vanguard rocket was designed as a three-stage vehicle. The first stage was a General Electric X-405 liquid-fueled engine (designated XLR50-GE-2 by the Navy),derived from the engine of the RTV-N-12a Viking. The second stage was the Aerojet General AJ10-37 (XLR52-AJ-2) liquid-fueled engine,a variant of the engine in the RTV-N-10 Aerobee. Finally,the third stage was a solid-propellant rocket motor. All three-stage Vanguard flights except the last one used a motor built by the Grand Central Rocket Company. Vanguard had no fins,and the first and second stages were steered by gimbaled engines. The second stage housed the vehicle's telemetry system,the inertial guidance system and the autopilot. The third stage was spin-stabilized,with the spin imparted by a turntable on the second stage before separation.
The Vanguard's second stage served for decades as the Able and Delta second stage for satellite launch vehicles. [13] The AJ10 engine which made up those stages was adapted into the AJ10-137,which was used as the Apollo Service Module engine. The AJ10-190,adapted from the Apollo spacecraft was used on the Space Shuttle for orbital maneuvers. [14] The AJ10-160 is to be repurposed for use on NASA's upcoming Orion spacecraft.
The first two flights of the Vanguard program,designated Vanguard TV-0 and Vanguard TV-1,were actually the last two remaining RTV-N-12a Viking rockets modified. Vanguard TV-0,launched on 8 December 1956,primarily tested new telemetry systems,while Vanguard TV-1 on 1 May 1957,was a two-stage vehicle testing separation and ignition of the solid-fueled upper stage of Vanguard. Vanguard TV-2,launched on 23 October 1957,after several abortive attempts,was the first real Vanguard rocket. The second and third stages were inert,but the flight successfully tested first/second-stage separation and spin-up of the third stage. However,by that time,the Soviet Union had already placed the Sputnik 1 satellite into orbit,and so project Vanguard was more or less forced to launch its own satellite as soon as possible. Therefore,a very small experimental satellite (derisively called the "grapefruit" by Nikita Khrushchev,and weighing only 1.5 kilograms (3.3 lb)) was added to Vanguard TV-3,which was to be the first test of an all-up Vanguard rocket. Although the NRL and Glenn L. Martin Company tried to emphasize that the Vanguard TV-3 mission was a pure test flight (and one with several "firsts"),everyone else saw it as the first satellite launch of the Western world,billed as "America's answer to Sputnik". Wernher von Braun angrily said about the Sputnik launch:"We knew they were going to do it. Vanguard will never make it. We have the hardware on the shelf. We can put up a satellite in 60 days". [15]
On 6 December 1957,the US Navy launched Vanguard TV-3 rocket,carrying a 1.5-kilogram (3.3 lb) satellite,from Cape Canaveral. It only reached an altitude of 1.2 meters (3.9 ft) before it fell and exploded. The satellite was exploded from the top of the rocket,landed in bushes near the pad,and began transmitting signals,leading New York Journal-American columnist Dorothy Kilgallen to remark "Why doesn't somebody go out there,find it,and shoot it?" [16] The American press called it Kaputnik. [17]
Investigation into the accident concluded that inadequate fuel tank pressure had allowed hot exhaust gases to back up into the injector head and destroy it,causing complete loss of engine thrust. After the failure of Vanguard TV-3,the backup vehicle,Vanguard TV-3BU ("BU" for backup),was prepared for another attempt. Pad crews hastened to repair the damage done to LC-18A by Vanguard TV-3's explosion,and in the third week of January 1958,the job was completed. Vanguard TV-3BU was erected on the pad,but continuous delays frustrated the launch attempt. Heavy rains shorted some electrical cables on the ground and necessitated their replacement. The second stage had also been sitting on the pad with a full load of nitric acid for several weeks,which eventually corroded the fuel tank and valves. It had to be removed and replaced by a different stage. Finally,the launch got under way on the night of 5 February 1958. The Vanguard lifted smoothly into the sky and performed well until 57 seconds into launch,when the booster pitched over almost 40°. The skinny second stage broke in half from aerodynamic stress four seconds later,causing the Vanguard to tumble end-over-end before range safety officer sent the destruct command. Cause of the failure was attributed to a spurious guidance signal that caused the first stage to perform unintended pitch maneuvers. The guidance system was modified to have greater redundancy,and efforts were made to improve quality control. On 17 March 1958,Vanguard TV-4 finally succeeded in orbiting the Vanguard 1 satellite. By that time,however,the Army's Juno (Jupiter-C) had already launched the United States' first satellite,Explorer 1. The Vanguard TV-4 rocket had put the satellite Vanguard 1,to a relatively high orbit of (3,966 by 653 kilometers (2,464 mi × 406 mi)). Vanguard 1 and its third stage remain in orbit as the oldest man-made artifacts in space. [18] [19] The following four flights,TV-5 and SLV (Satellite Launch Vehicle) Vanguard SLV-1,Vanguard SLV-2 and Vanguard SLV-3 all failed,but on 17 February 1959,Vanguard SLV-4 launched Vanguard 2,weighing 10.8 kilograms (24 lb),into orbit. The SLVs were the "production" Vanguard rockets. Vanguard SLV-5 and Vanguard SLV-6 also failed,but the final flight on 18 September 1959,successfully orbited the 24-kilogram (53 lb) Vanguard 3 satellite. That last mission was designated Vanguard TV-4BU,because it used a remaining test vehicle,which had been upgraded with a new third stage,the Allegany Ballistics Laboratory X-248A2 Altair. This more powerful motor enabled the launch of the heavier payload. The combination of the AJ10 liquid engine and X-248 solid motor was also used,under the name Able,as an upper stage combination for Thor and Atlas space launch vehicles.
Vanguard launched 3 satellites out of 11 launch attempts:
The Jupiter-C was an American research and development vehicle developed from the Jupiter-A. Jupiter-C was used for three uncrewed sub-orbital spaceflights in 1956 and 1957 to test re-entry nosecones that were later to be deployed on the more advanced PGM-19 Jupiter mobile missile. The recovered nosecone was displayed in the Oval Office as part of President Dwight D. Eisenhower's televised speech on November 7,1957.
Vanguard TV-3,was the first attempt of the United States to launch a satellite into orbit around the Earth,after the successful Soviet launches of Sputnik 1 and Sputnik 2. Vanguard TV-3 was a small satellite designed to test the launch capabilities of the three-stage Vanguard and study the effects of the environment on a satellite and its systems in Earth orbit. It was also to be used to obtain geodetic measurements through orbit analysis. Solar cells on Vanguard TV-3 were manufactured by Bell Laboratories.
Project Vanguard was a program managed by the United States Navy Naval Research Laboratory (NRL),which intended to launch the first artificial satellite into low Earth orbit using a Vanguard rocket. as the launch vehicle from Cape Canaveral Missile Annex,Florida.
The Saturn family of American rockets was developed by a team of former German rocket engineers and scientists led by Wernher von Braun to launch heavy payloads to Earth orbit and beyond. The Saturn family used liquid hydrogen as fuel in the upper stages. Originally proposed as a military satellite launcher,they were adopted as the launch vehicles for the Apollo Moon program. Three versions were built and flown:the medium-lift Saturn I,the heavy-lift Saturn IB,and the super heavy-lift Saturn V.
Vanguard 3 is a scientific satellite that was launched into Earth orbit by the Vanguard SLV-7 on 18 September 1959,the third successful Vanguard launch out of eleven attempts. Vanguard rocket:Vanguard Satellite Launch Vehicle-7 (SLV-7) was an unused Vanguard TV-4BU rocket,updated to the final production Satellite Launch Vehicle (SLV).
Explorer 3 was an American artificial satellite launched into medium Earth orbit in 1958. It was the second successful launch in the Explorer program,and was nearly identical to the first U.S. satellite Explorer 1 in its design and mission.
Thor was a US space launch vehicle derived from the PGM-17 Thor intermediate-range ballistic missile. The Thor rocket was the first member of the Delta rocket family of space launch vehicles. The last launch of a direct derivative of the Thor missile occurred in 2018 as the first stage of the final Delta II.
The Sputnik rocket was an uncrewed orbital carrier rocket designed by Sergei Korolev in the Soviet Union,derived from the R-7 Semyorka ICBM. On 4 October 1957,it was used to perform the world's first satellite launch,placing Sputnik 1 into a low Earth orbit.
The Atlas E/F was an American expendable launch system and sounding rocket built using parts of decommissioned SM-65 Atlas missiles. It was a member of the Atlas family of rockets.
Vanguard TV-3BU,also called Vanguard Test Vehicle-Three Backup,was the second flight of the American Vanguard rocket. An unsuccessful attempt to place an unnamed satellite,Vanguard 1B,into orbit,the rocket was launched on 5 February 1958. It was launched from LC-18A at the Cape Canaveral Air Force Station. Fifty-seven seconds after launch,control of the vehicle was lost,and it failed to achieve orbit. At 57 seconds,the booster suddenly pitched down. The skinny second stage broke in half from aerodynamic stress,causing the Vanguard to tumble end-over-end before a range safety officer sent the destruct command. The cause of the failure was attributed to a spurious guidance signal that caused the first stage to perform unintended pitch maneuvers. Vanguard TV-3BU only reached an altitude of 6.1 km (3.8 mi),the goal was 3,840 km (2,390 mi).
Vanguard TV-0,also called Vanguard Test Vehicle-Zero,was the first sub-orbital test flight of a Viking rocket as part of the Project Vanguard.
Vanguard TV-1,also called Vanguard Test Vehicle-One,was the second sub-orbital test flight of a Vanguard rocket as part of the Project Vanguard. Vanguard TV-1 followed the successful launch of Vanguard TV-0 a one-stage rocket launched in December 1956.
Vanguard TV-2,also called Vanguard Test Vehicle-Two,was the third suborbital test flight of a Vanguard rocket as part of Project Vanguard. Successful TV-2 followed the successful launch of Vanguard TV-0 a one-stage rocket launched in December 1956 and Vanguard TV-1 a two-stage rocket launched in May 1957.
Vanguard TV-5,also called Vanguard Test Vehicle-Five,was a failed flight of the American Vanguard rocket following the successful launch of Vanguard 1 on Vanguard TV-4. Vanguard TV-5 launched on 29 April 1958 at 02:53:00 GMT,from Launch Complex 18A at the Cape Canaveral Air Force Station. The rocket was unsuccessful in its attempt to place an unnamed satellite into orbit.
Vanguard SLV-1,also called Vanguard Satellite Launch Vehicle-1 was hoped to be the second successful flight of the American Vanguard rocket following the successful launch of the Vanguard 1 satellite on rocket Vanguard TV-4 in March 1958.
Vanguard SLV-2,also called Vanguard Satellite Launch Vehicle-2 hoped to be the second successful flight of the American Vanguard rocket following successful Vanguard 1 satellite on rocket Vanguard TV-4.
Vanguard SLV-3,also called Vanguard Satellite Launch Vehicle-3 hoped to be the second successful flight of the American Vanguard rocket following successful Vanguard 1 satellite on rocket Vanguard TV-4.
Vanguard SLV-5,also called Vanguard Satellite Launch Vehicle-Five hoped to be the third successful flight of the American Vanguard rocket following the successful Vanguard 2 satellite on rocket Vanguard SLV-4.
Vanguard SLV-6,also called Vanguard Satellite Launch Vehicle-Six,hoped to be the third successful flight of the American Vanguard rocket following the successful Vanguard 2 satellite on rocket Vanguard SLV-4. Vanguard Satellite Launch Vehicle-6 (SLV-6) was designed to carry a small spherical satellite into Earth orbit to study solar heating of Earth and the heat balance. A faulty second stage pressure valve caused a mission failure.
The Able rocket stage was a rocket stage manufactured in the United States by Aerojet as the second of three stages of the Vanguard rocket used in the Vanguard project from 1957 to 1959. The rocket engine used nitric acid and UDMH as rocket propellants. The Able rocket stage was discontinued in 1960. The improved Ablestar version was used as the upper stage of the Thor-Ablestar two stage launcher. The Ablestar second stage was an enlarged version of the Able rocket stage,which gave the Thor-Ablestar a greater payload capacity compared to the earlier Thor-Able. It also incorporated restart capabilities,allowing a multiple-burn trajectory to be flown,further increasing payload,or allowing the rocket to reach different orbits. It was the first rocket to be developed with such a capability and development of the stage took a mere eight months.
Scripps-Howard's WASHINGTON DAILY NEWS: SAMNIK IS KAPUTNIK