Terrier Orion



The Terrier Orion sounding rocket is a combination of the Terrier booster rocket with the Orion rocket used as a second stage. This spin stabilized configuration is most often used by the Goddard Space Flight Center, who operate out of the Wallops Flight Facility for sounding rocket operations. The system supports payloads ranging from 200 to 800 lb, and is capable of achieving altitudes as high as 200 km, but at least 80 km, depending on payload size.

Technical details
The Terrier Orion system is designed to be rail launched, and can be supported at most fixed and mobile launch sites. The Terrier Mk 12 Mod 1 or Mk 70 rocket used for the first stage uses an 18 in diameter motor along with 2.5 or cruciform configured tail fins. The Improved Orion motor used in the second stage is 14 in in diameter and 110 in long. The system typically uses spin motors and has a total weight of approximately 2900 lb, excluding payload.

Improved Orion
The Improved Orion motor uses a "bi-phase propellant" system which provides it with around 19000 lbf of thrust during the first four seconds of motor burn. The thrust then tails off to approximately 3000 lbf of thrust until burnout occurs at around 25 seconds. The fins are normally configured so that the rocket will have a stabilizing spin rate of approximately four cycles per second.

As a standalone rocket, it has a maximum flight altitude of 85 km, a liftoff thrust of 7.00 kN, a total mass of 400 kg, a core diameter of 0.35 m and a total length of 5.60 m, launching a total of 67 times with no attached Terrier rocket.