Apollo/Saturn V J-2 Rocket Engine Steering (Pitch) Actuator, measuring approximately 27˝ x 8˝ x 7˝ and weighing approximately 43 lbs, retaining its affixed Moog Servocontrols, Inc. label: "Actuator Part No. 42826, Actuator Serial No. 21, Model No. 17-189A, Assy. Serial No. 21." Displayed on a 30˝ x 12˝ wooden base, annotated with a hand-painted presentation caption: "Presented to D.R. Scott, Cmdr., Apollo 15 by Dr. J.C. Houbolt and the 'Back Room Boys' at NSA… 4/1/72… (Navigational Actuator #5), 'It Worked!'" The pitch actuator, and its companion yaw actuator, were used to vector the Saturn V 2nd and 3rd Stage J-2 engine nozzle thrust to achieve the required flight trajectory during Lift Off, Earth Orbit Insertion and Translunar Injection. In fine condition.
The actuator assembly was intended for presentation by Dr. John Houbolt and his team to Apollo 15 Astronaut Dave Scott. Houbolt was famous for developing the concept of Lunar Orbit Rendezvous (LOR) and convincing Wernher von Braun to employ his idea, now viewed as vital to the success of the Apollo program.
