Delta L

This article is about the rocket, for the firearms issue see Delta L problem

Delta L
Launch history
Delta L before the failed attempt to launch Pioneer E
Function	Expendable launch system
Country of origin	USA
Status	Retired
Launch sites	Cape Canaveral LC-17A Vandenberg SLC-2E
Total launches	2
Successes	1
Failures	1
First flight	27 August 1969
Last flight	31 January 1972

The Delta L, Thor-Delta L, or Thrust-Augmented Long Tank Thor-Delta was a US expendable launch system used to launch the Pioneer E and TETR satellites in 1969 (failed) and HEOS satellite in 1972. It was a member of the Delta family of rockets.

The Delta L was a three-stage rocket. The first stage was a Long Tank Thor, a stretched version of the Thor missile, augmented by three Castor-2 solid rocket boosters. The second stage was the Delta E. An FW-1D solid rocket motor was used as the third stage.

The first launch of the Delta L took place on 27 August 1969, from Launch Complex 17A at the Cape Canaveral Air Force Station. A defective valve caused plumbing in the hydraulics system to rupture and leak fluid, causing first stage engine gimbaling to fail around 2-1/2 minutes into launch. The stage completed its burn successfully, but threw the second stage far off course. Orbital velocity could not be achieved and Range Safety sent the destruct command at T+383 seconds. Neither the Pioneer E nor the TETR^[1] payloads achieved orbit. The second, and final, Delta L launch was from Space Launch Complex 2E at the Vandenberg Air Force Base, on 31 January 1972. It successfully placed the HEOS-2 satellite into a highly elliptical orbit.

Notes

↑ Test satellite for NASA's Manned Space Flight Network see: http://www.astronautix.com/craft/tetr.htm

References

Wade, Mark. "Delta". Encyclopedia Astronautica. Retrieved 2009-02-10.
Krebs, Gunter. "Thor family". Gunter's Space Page. Retrieved 2009-02-10.

Orbital launch systems

See also: Comparison of orbital launch systems

Current	Angara 1.2 A5 Antares 200 Ariane 5 Atlas V Delta II IV Dnepr Epsilon Falcon 9 v1.2 "Full Thrust" GSLV H-IIA H-IIB Kuaizhou Long March 2C 2D 2F 3A 3B 3C 4B 4C 5 6 7 11 LVM3 Minotaur I IV V C Pegasus Proton-M PSLV Rokot Safir Shavit Simorgh Soyuz U FG Soyuz-2 2.1a / STA 2.1b / STB 2-1v Strela Unha Vega Zenit 3SL 3SLB 3F

In development	Angara A5P A5V Antares 300 Ariane 6 Electron Falcon 9 "Block 5" Falcon Heavy Firefly α H3 ITS KZ-11 KZ-21 Long March 8 9 LauncherOne Mayak Naga-L Naro-2 New Glenn Orel Proton Light Medium RPS SLS Soyuz-5 SPARK SS-520 Tronador II Tsyklon-4 ULV VLM Vulcan

Retired	Antares 100 Ariane 1 2 3 4 ASLV Athena I II Atlas B D E/F G H I II III LV-3B SLV-3 Able Agena Centaur Black Arrow Conestoga Delta A B C D E G J L M N 0100 1000 2000 3000 4000 5000 III Diamant Energia Europa Falcon 1 Falcon 9 v1.0 v1.1 Feng Bao 1 H-I H-II Juno I Juno II Kaituozhe-1 Kosmos 1 2I 3 3M Lambda 4S Long March 1 2A 2E 3 4A Mu 4S 3C 3H 3S 3SII V N1 N-I N-II Naro-1 Paektusan Pilot Proton UR-500 K R-7 Luna Molniya M L Polyot Soyuz original L M U2 Soyuz/Vostok Sputnik Voskhod Vostok L K 2 2M R-29 Shtil' Volna Saturn I IB V INT-21 Scout SLV Space Shuttle Sparta Start-1 Thor Able Ablestar Agena Burner Delta DSV-2U Thorad-Agena Titan II GLV IIIA IIIB IIIC IIID IIIE 34D 23G CT-3 IV Tsyklon 2 3 Vanguard Zenit 2 2M

United States orbital launch systems

Active	Antares Atlas V Delta II IV Heavy Falcon 9 Full Thrust Minotaur I IV V C Pegasus

In development	Athena Ic IIc III Falcon Heavy ITS New Glenn SLS SPARK Vulcan

Retired	Ares I V 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 III Falcon 1 Falcon 9 v1.0 v1.1 H-I* Juno I Juno II N-I* N-II* Pilot Saturn I IB V INT-21 Scout Shuttle Sparta 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

Thor and Delta rockets

Rockets

Thor

Delta

Alphabetical	Delta A Delta B Delta C Delta D Delta E Delta F Delta G Delta J Delta L Delta M Delta N

Numerical	Delta 0100 Delta 1000 Delta 2000 Delta 3000 Delta 4000 Delta 5000 Delta 6000 Delta 7000 Delta 8000 Delta 9000

Modern	Delta II Delta III Delta IV

Export

Launch sites

Canaveral	(S)LC-17 LC-18B SLC-37B

Johnston	LE-1 LE-2

Tanegashima	Osaki

Vandenberg	SLC-1 SLC-2 SLC-3 SLC-6 SLC-10

Bases	Bardney Breighton Caistor Carnaby Catfoss Coleby Grange Driffield Feltwell Folkingham Full Sutton Harrington Hemswell Ludford Magna Melton Mowbray Mepal North Luffenham North Pickenham Polebrook Shepherds Grove Tuddenham

Components

Boosters

First stages

Common Booster Core

Upper Stages

Delta	Delta-A Delta-D Delta-E Delta-F Delta-K Delta-P DCSS

Other	Able Ablestar Agena Altair Burner FW-4D IABS PAM-D Star UM-129

Engines

Manufacturers

Rocket	Douglas McDonnell Douglas Boeing United Launch Alliance

Engines	Aerojet Alliant Rocketdyne Thiokol TRW

Launches

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