The Belt Object Survey Ship (B.O.S.S) was designed over 40 years ago, in a time where nuclear propulsion and solar power were the latest in space flight innovations. Bill Simon created designed this one-of-a-kind rocket in partnership with Estes. This long-awaited prototype is being released for the first time. -Skill Level: Advanced -Estimated Assembly Time: 2-3 hours -Length: 27.8 in. -Projected Altitude: 600 ft. -Recommended Engines: C6-5, B4-4, B6-4