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	45 m (148 ft)
Diameter	3.05 m (10.0 ft)
Mass	156,540 kg (345,110 lb)
Stages	3
Capacity
Payload to LEO
Mass	3,300 kg (7,300 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
Partial failure(s)	2
First flight	29 July 1966
Last flight	12 February 1987
First stage (Titan 23B/33B)
Powered by	2 LR87-AJ-5
Maximum thrust	1,913 kN (430,000 lbf)
Burn time	147 seconds
Propellant	N2O4 / Aerozine 50
Second stage
Powered by	1 LR87-AJ-5
Maximum thrust	445 kN (100,000 lbf)
Burn time	205 seconds
Propellant	N2O4 / Aerozine 50
Third stage – Agena
Powered by	1 Bell XLR81-BA-9
Maximum thrust	71.7 kN (16,100 lbf)
Burn time	240 seconds
Propellant	IRFNA/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.