Strypi

Strypi is the name of a US sounding rocket. The Strypi has two stages. The first stage consists of two Recruit, the second of one Castor-rocket. The Strypi has a maximum flight height of 200 kilometres and a diameter of 79 centimetres.

The rocket was originally designed and built in 1962 by teams from the Sandia National Laboratories in an around-the-clock program that was a part of a larger nuclear weapons testing program, undertaken prior to the imposition of the Limited Test Ban Treaty (LTBT) in October, 1963. It was designed to take a nuclear warhead into space for extra-atmospheric testing. Though it performed this function only once, in Test Checkmate of Operation Fishbowl, Strypi did become the "workhorse" of Sandia's rocket research program. The rocket's name came from the efforts of the Sandia teams, which had "taken the tiger by the tail".

In 1968, a modified Strypi was used in Material Test Vehicle (MTV) booster tests. Although atmospheric nuclear testing was now banned, as a part of the Test Readiness Program the U.S. Air Force continued to develop the means of testing, should the ban be lifted.