- Family: Blue Scout
- Length: 24 m
- Diameter: 1.02 m
- Launch Mass: 16 T
- Low Earth Orbit Capacity: 30 kg
The Blue Scout II was manufactured by Vought with the first launch on 1961-03-03. Blue Scout II has 0 successful launches and 1 failed launches with a total of 1 launches. The RM-90 Blue Scout II was an American sounding rocket and expendable launch system which was flown three times during 1961. It was used for two HETS test flights, and the launch of the Mercury-Scout 1 satellite for NASA. It was a member of the Scout family of rockets.