Viking 5
Snecma Moteurs Viking 5 is a storable-propellant nitrogen-tetroxide/UH25 liquid rocket engine used as the four-engine Ariane first-stage set. ESA reports 2,720 kN total launch thrust from four Viking 5 engines for up to 205 s, approximately 680 kN per engine derived from that total; the model was used across Ariane 1 through Ariane 4 core configurations and is retired.
Identity
- Aliases
- Viking 5Viking-5Snecma Viking 5Ariane first-stage Viking 5
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Viking 5
- Status
- retired
Details
- Description
- Snecma Moteurs Viking 5 is a storable-propellant nitrogen-tetroxide/UH25 liquid rocket engine used as the four-engine Ariane first-stage set. ESA reports 2,720 kN total launch thrust from four Viking 5 engines for up to 205 s, approximately 680 kN per engine derived from that total; the model was used across Ariane 1 through Ariane 4 core configurations and is retired.
- First Flight Date
- 1979-12-24
- Propellants
- nitrogen tetroxideUH25
- Rocket Specs
- Burn Time S
- 205
- Sea Level Thrust Kn
- 680
Links
Assets & Meta
- Creation Time
- August 1, 2026 at 08:30:59 UTC
- Updated Time
- August 22, 2026 at 08:05:01 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- ESA identifies four Viking 5 engines on Ariane 4 stage 1 and documents their NTO/UH25 propellant combination.
- Publisher
- European Space Agency
- Title
- Achievements: Ariane 4 principal characteristics
- Accessed Date
- 2026-08-01
- Note
- ArianeGroup distinguishes Ariane 4's six configurations, including the no-booster 40 variant.
- Publisher
- ArianeGroup
- Title
- Ariane 4, a real success story for technology and industry
- Accessed Date
- 2026-08-15
- Note
- ESA records Ariane 1's successful maiden flight on 24 December 1979; Viking 5 was the four-engine first-stage identity used by the Ariane family.
- Publisher
- European Space Agency
- Title
- History: Ariane L01, 1979