Titan IIIB

Titan IIIB
	Titan 23B launching KH-8 reconnaissance satellite from Vandenberg AFB, CA. (USAF)
Function	Medium launch vehicle
Manufacturer	Martin
Country of origin	United States
Size
Height	45m (147.00 ft)
Diameter	3.05m (10 ft)
Mass	156,540kg (345,110 lb)
Stages	3
Capacity
Payload to LEO	3,000kg (7,500 lb (23B))
Associated rockets
Family	Titan
Launch history
Status	Retired
Launch sites	SLC-4W, Vandenberg AFB
Total launches	68
Success(es)	62
Failure(s)	4
First flight	29 July 1966
Last flight	12 February 1987
First stage (Titan 23B/33B)
Engines	2 x LR87-AJ-5
Thrust	1,913 kN (430,000 lbf)
Burn time	147 seconds
Propellant	A-50 hydrazine/N2O4
Second stage
Engines	2 x LR91-AJ-5
Thrust	445 kN (100,000 lbf)
Burn time	205 seconds
Propellant	A-50 hydrazine/N2O4
Third stage - Agena
Engines	1 x Bell XLR81-BA-9
Thrust	71.1 kN (16,000 lbf)
Burn time	240 seconds
Propellant	N2O4/UDMH
	[edit on Wikidata]

Titan IIIB was the collective name for a number of derivatives of the Titan II ICBM and Titan III launch vehicle, modified by the addition of an Agena upper stage. It consisted of four separate rockets. The Titan 23B was a basic Titan II with an Agena upper stage, and the Titan 24B was the same concept, but using the slightly enlarged Titan IIIM rocket as the base. The Titan 33B was a Titan 23B with the Agena (which had a smaller diameter than the Titan) enclosed in an enlarged fairing, in order to allow larger payloads to be launched. The final member of the Titan IIIB family was the Titan 34B which was a Titan 24B with the larger fairing used on the Titan 33B.

Features

The Titan 23B space launch vehicle was a three-stage liquid fueled booster, designed to provide a small-to-medium weight class capability. It is able to lift approximately 3,000 kg (7,500 lb) into a polar low-Earth circular orbit. The first stage consists of a ground ignited LR87 liquid propellant rocket, while the second stage consists of an LR91 liquid propellant rocket. The third stage is an Agena D XLR81-BA-9 liquid propellant rocket.

Various models of this Titan/Agena D rocket were called, "Titan 23B", "Titan 24B", "Titan 33B" and "Titan 34B".

Background

The Titan rocket family was established in October 1955, when the Air Force awarded The Martin Company a contract to build an intercontinental ballistic missile (ICBM). It became known as the Titan I, the nation’s first two-stage ICBM and first underground silo-based ICBM. More than 140 Titan II ICBMs, once the vanguard of America’s strategic deterrent force, were built. Titan IIs also were flown in NASA’s Gemini manned space program in the mid-1960s. The Titan 23B is a derivative of the Titan II vehicle with an Agena D upper stage added.

Primary function: Launch vehicle used to lift medium class satellites into space

Builder: The Martin Company

Launch site: Vandenberg AFB, Calif.

First stage: Length: 70 ft (21 m)
Diameter: 10 feet
Engine thrust: 474,000 lbf (2,108 kN) vacuum
Weight: 258,000 lb (117,020 kg) Fueled
- Empty weight: 10,500 lb (4,760 kg)

Second stage: Length: 24 ft (7.3 m)
Diameter: 10 ft (3.0 m)
Engine Thrust: 100,000 lbf (445 kN) vacuum
Weight: 64,000 lb (29,030 kg) Fueled
- Empty weight: 6,100 lb (2,760 kg)

Third stage: Length: 24.8 ft (7.6 m)
Diameter: 5 ft (1.5 m)
Engine thrust: 16,000 lbf (71 kN) vacuum
Weight: 7160 kg (15800 lb) - fueled
- Empty Weight: 2300 lb (1045 kg)

Guidance: Inertial
Subcontractor: Delco Electronics

Payload fairing: Diameter: 5 ft (1.5 m)
Length: 20 to 25 ft (6.1 to 7.6 m)

Skin and Stringer Construction – Tri-Sector Design
Subcontractor: Boeing

Date deployed: July 1966

Titan 23B

Titan 23B used the basic Titan 3A core with an Agena D upper stage. The Titan 23B was launched from SLC-4W at Vandenberg AFB, Calif. Its main payload was the GAMBIT (KH-8 reconnaissance) satellites, although the final two 23B vehicles carried Jumpseat SIGNIT satellites and had some minor upper stage modifications for them. 33 flights were made from 1966 to 1971, with one failure.^[1]

Titan 24B

The Titan 24B differed from the Titan 23B in that the stretched Titan IIIM core was used in place of the original Titan II core. The payload remained attached to the Agena stage. 23 flights took place from 1971 to 1984, with two failures.

Titan 33B

The Titan 33B was a Titan 23B with the entire Agena and payload completely enclosed in a shroud. It flew only three times (1971–73) with one failure and was used to launch Jumpseat satellites.

Titan 34B

The Titan 34B was a Titan 24B, modified by the addition of the larger fairing used on the Titan 33B. 23 were launched in 1971 to 1984 with two failures. All launches consisted of KH-8 satellites.

Failures

Titan IIIB rockets suffered four outright failures, and two partial failures. The first failure occurred on 26 April 1967, when the second stage of a Titan III(23)B lost thrust during the launch of a Gambit 3 satellite. The next launch, on 20 June 1967 was a partial failure; due to a problem with the protective skirt on the second stage, a lower-than-planned orbit was achieved.^[2] On 24 October 1969 OPS 8455 was placed into a higher-than-planned orbit by another 23B due to an engine failing to cut off after completing its planned burn, however the payload was able to correct its own orbit.^[3]

On 16 February 1972, a Titan III(33)B failed to achieve orbit carrying a Jumpseat satellite.^[4] Another failure occurred later the same year, when on 20 May a Titan III(24)B failed to achieve orbit with another Gambit 3. Another Titan III(24)B failed to place a Gambit 3 into orbit on 26 June 1973, this time because of the Agena malfunctioning.^[5]

References

^ http://www.astronautix.com/lvs/titan24b.htm
^ "History of Satellite Reconnaissance Volume 5, Management of NRP" (PDF). US National Reconnaissance Office. Retrieved 19 September 2011.
^ Perry, Robert, A History of Satellite Reconnaissance, vol. IIIA, US National Reconnaissance Office, pp. 291–2
^ Wade, Mark. "Titan 33B". Encyclopedia Astronautica. Retrieved 19 September 2011.
^ Wade, Mark. "Titan 24B". Encyclopedia Astronautica. Retrieved 19 September 2011.

External links

Titan missiles & variations

[1] ttp://www.astronautix.com/lvs/titan24b.htm

[2] "History of Satellite Reconnaissance Volume 5, Management of NRP" (PDF). US National Reconnaissance Office. Retrieved 19 September 2011.

[3] Perry, Robert, A History of Satellite Reconnaissance, vol. IIIA, US National Reconnaissance Office, pp. 291–2

[4] Wade, Mark. "Titan 33B". Encyclopedia Astronautica. Retrieved 19 September 2011.

[5] Wade, Mark. "Titan 24B". Encyclopedia Astronautica. Retrieved 19 September 2011.

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v t e Orbital launch systems
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In development	Antares 330 Ariane 6 Bloostar Cyclone-4M Epsilon S Eris Gravity-2 Hyperbola-2 Irtysh Kuaizhou 21 31 Long March 9 10 12 Miura 5 MLV Neutron New Glenn New Line 1 NGLV Nova OS-M 2 4 Orbex Prime Pallas-1 Red Dwarf SLS Block 1B Block 2 Soyuz-7 Terran R Tianlong-3 VLM Vega E Zero Zhuque 3 Zuljanah
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Classes	Sounding rocket Small-lift launch vehicle Medium-lift launch vehicle Heavy-lift launch vehicle Super heavy-lift launch vehicle
This Template lists historical, current, and future space rockets that at least once attempted (but not necessarily succeeded in) an orbital launch or that are planned to attempt such a launch in the future Symbol ^† indicates past or current rockets that attempted orbital launches but never succeeded (never did or has yet to perform a successful orbital launch)

v t e Orbital launch systems developed in the United States
Active	Atlas V**^†† Electron Falcon 9 Block 5 Falcon Heavy Firefly Alpha Minotaur I IV V C Pegasus XL RS1^† SLS Block 1 Vulcan Centaur
In development	Antares 330 Daytona I MLV New Glenn Neutron Nova Red Dwarf SLS Block 1B Block 2 Starship Terran R
Retired	Antares 110/120/130/230/230+^††† Athena I II Atlas B D E/F G H I II III LV-3B SLV-3 Able Agena Centaur Conestoga Delta A B C D E G J L M N 0100 1000 2000 3000 4000 5000 II III IV IV Heavy Falcon 1 Falcon 9 v1.0 v1.1 v1.2 "Full Thrust" H-I* Juno I Juno II LauncherOne N-I* N-II* Pilot Rocket 3 Saturn I IB V Scout Space Shuttle SPARK Sparta Terran 1 Thor Able Ablestar Agena Burner Delta DSV-2U Thorad-Agena Titan II GLV IIIA IIIB IIIC IIID IIIE 34D 23G CT-3 IV Vanguard
* - Japanese projects using US rockets or stages ** - uses Russian engines ^† - never succeeded ^†† - no new orders accepted ^††† - used Ukrainian first stage