Viking
Rocket engine
>
&h=3504&w=2336&tbnid=T-x9tvmDJbbvbM&q=Viking+(rocket+engine)&tbnh=275&tbnw=183&usg=AI4_-kQAyAzk7ZbHvcuHCfKGF8vRRrVjUw&vet=1&docid=tZzDclfbhq6mmM&itg=1&sa=X&ved=2ahUKEwiHicSz-N6FAxVJjokEHTJ-DsMQ9QF6BAgAEAQ)
&tbnh=100&tbnw=150&usg=AI4_-kTIiuo-Gym6GtbSRletpBLBjyHfZQ&vet=1&docid=n-K0v98AdMiBlM&sa=X&ved=2ahUKEwiHicSz-N6FAxVJjokEHTJ-DsMQ9QF6BAgAEAg)
&tbnh=113&tbnw=150&usg=AI4_-kQcxdYF844aNXvlNWl3f9tVt65H_g&vet=1&docid=2uv30cG7zoMjAM&sa=X&ved=2ahUKEwiHicSz-N6FAxVJjokEHTJ-DsMQ9QF6BAgAEAo)
The Viking rocket engines were members of a series of bipropellant engines for the first and second stages of the Ariane 1 through Ariane 4 commercial launch vehicles, using storable, hypergolic propellants: dinitrogen tetroxide and UH 25, a... Wikipedia
Chamber: Film-cooled, ablative throat insert
Designer: Société Européenne de Propulsion (SEP)
Diameter: 0.95–1.7 m (3.1–5.6 ft)
First flight: 1979
Gimbal range: Fixed, swiveled, and gimbaled versions were made
Last flight: 2003
Nozzle ratio: 10 (Viking 5C); 30.8 (Viking 4B)