A boilerplate spacecraft, also known as a mass simulator, is a nonfunctional craft or payload that is used to test various configurations and basic size, load, and handling characteristics of rocket l
Boilerplate version of Gemini spacecraft on display at Air Force Space and Missile Museum, Cape Canaveral, Florida, October 15, 2004
The prototype Space Shuttle orbiter Enterprise in full boilerplate stack configuration with External Tank and SRBs ready to undergo vibration testing at the Marshall Space Flight Center, October 4, 1978