The Terrier-Orion rocket system is a two stage spin stabilized rocket system which utilizes a Terrier MK 12 Mod 1 or Mk70 for the first stage and an Improved Orion motor for the second stage. The Terrier motor is 18 inches in diameter and is configured with 2.5 ft2 or 4.8 ft2 fin panels arranged in a cruciform configuration. The Orion motor is 14 inches in diameter and 110 inches long. The vehicle is typically configured with spin motors and the total weight of this configuration, excluding the payload, is approximately 2,900 pounds. Credit: NASA/Wallops

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