Viper Falcon is an American two-stage

sounding rocket A sounding rocket or rocketsonde, sometimes called a research rocket or a suborbital rocket, is an instrument-carrying rocket designed to take measurements and perform scientific experiments during its sub-orbital flight. The rockets are used to ...

. The first stage is Viper I and the second stage is Falcon. The Viper Falcon program was started in 1960. The Viper Falcon has a ceiling of and a length of 3.50 meters.

References

Sounding rockets of the United States {{Rocket-stub