# Boilerplate 23 > test article used during the Apollo program **Wikidata**: [Q87988428](https://www.wikidata.org/wiki/Q87988428) **Source**: https://4ort.xyz/entity/boilerplate-23 ## Summary Boilerplate 23 (BP-23), also known as Apollo Test Capsule 23, is a nonfunctional steel test article spacecraft manufactured by McDonnell Aircraft Corporation for the United States Apollo program circa 1964. It served as a mass simulator to evaluate spacecraft design, structural integrity, and performance under simulated space conditions, playing a critical role in pre-flight testing before operational lunar missions. The artifact is currently housed in the collection of the National Air and Space Museum and has been exhibited at the U.S. Space & Rocket Center in Huntsville, Alabama. ## Key Facts - **Name**: Boilerplate 23 (BP-23), Apollo Test Capsule 23 - **Classification**: boilerplate, test article, spacecraft - **Country**: United States - **Operator**: National Aeronautics and Space Administration (NASA) - **Manufacturer**: McDonnell Aircraft Corporation - **Material**: steel - **Inception**: 1964 (circa) - **Height**: 127 inches (322.58 centimeters) - **Diameter**: 154 inches (391.16 centimeters) - **Location**: Huntsville, Alabama - **Coordinates**: latitude 34.710598, longitude -86.657051 - **Current Collection**: National Air and Space Museum - **Smithsonian ARK ID**: nv92bd7221f-6f50-4dc2-8ab0-1009cafc55c3 - **Smithsonian Resource ID**: nasm_A19800181000 - **Exhibition History**: U.S. Space & Rocket Center (associated with SA-500D) - **Commons Category**: BP-23 - **Wikidata Description**: test article used during the Apollo program - **Sitelink Count**: 1 ## FAQs ### What was the purpose of Boilerplate 23 in the Apollo program? Boilerplate 23 served as a nonfunctional test article and mass simulator designed to help NASA engineers evaluate spacecraft design, structural integrity, and performance characteristics before committing to operational missions. As a boilerplate, it replicated the physical dimensions and mass properties of a functional Apollo command module without operational capabilities, allowing testing of structural loads, dynamics, and handling characteristics. ### Where is Boilerplate 23 currently located? Boilerplate 23 is part of the collection at the National Air and Space Museum. It has also been exhibited at the U.S. Space & Rocket Center in Huntsville, Alabama, associated with the artifact SA-500D. The artifact's coordinates in Huntsville are latitude 34.710598 and longitude -86.657051. ### What are the physical specifications of Boilerplate 23? Boilerplate 23 measures 127 inches (322.58 centimeters) in height and 154 inches (391.16 centimeters) in diameter. It was constructed from steel by McDonnell Aircraft Corporation and weighs approximately 4,500 pounds, serving as a full-scale mockup of the Apollo command module for testing purposes. ### Who manufactured Boilerplate 23? Boilerplate 23 was manufactured by McDonnell Aircraft Corporation, a major aerospace contractor that produced numerous spacecraft and test articles for the Apollo program. The company was later merged into McDonnell Douglas and eventually became part of Boeing. ### What is the relationship between Boilerplate 23 and other Apollo boilerplates? Boilerplate 23 is one of multiple Apollo program test articles used during the 1960s, alongside Boilerplate 29 (circa 1965), 1101A (circa 1965), 1102A (before 1968), and 30. Each boilerplate served specific testing purposes with varying configurations tailored to different evaluation needs throughout the Apollo program development cycle. ## Why It Matters Boilerplate 23 represents a critical component in the development chain of human spaceflight technology. During the Apollo program, NASA faced unprecedented engineering challenges requiring extensive ground testing before committing to costly operational missions. Boilerplates like BP-23 provided a cost-effective means to validate spacecraft designs, identify structural weaknesses, and refine manufacturing processes without risking human lives or expensive functional hardware. The significance of Boilerplate 23 extends beyond its immediate testing applications. It embodies the systematic approach to spacecraft development that enabled the United States to achieve lunar landing capabilities within a compressed timeline. By serving as a mass simulator, BP-23 allowed engineers to understand how the spacecraft would behave under various loading conditions, during launch vibrations, and in emergency scenarios like pad abort situations. The preservation of Boilerplate 23 in the National Air and Space Museum collection also matters because it provides tangible evidence of the engineering methodology behind one of humanity's greatest technological achievements. Understanding how these test articles contributed to mission success helps future engineers and historians appreciate the rigorous validation processes required for safe space exploration. Furthermore, the boilerplate testing methodology pioneered during Apollo—using nonfunctional replicas to de-risk operational systems—remains standard practice in modern spaceflight programs. Companies like SpaceX continue to employ qualification units and test articles, demonstrating the enduring legacy of the Apollo-era approach that Boilerplate 23 helped establish. ## Notable For - One of the earliest Apollo program test articles, dating to circa 1964 - Manufactured by McDonnell Aircraft Corporation, a key Apollo contractor - Constructed from steel for structural testing purposes - Full-scale representation of Apollo command module dimensions at 127 inches tall and 154 inches in diameter - Preserved in the National Air and Space Museum collection - Exhibited at the U.S. Space & Rocket Center in Huntsville, Alabama - Part of the broader Apollo boilerplate testing lineage that included BP-29, BP-30, BP-1101A, and BP-1102A - Located in Huntsville, Alabama, the birthplace of Apollo rocket development ## Body ### Definition and Classification Boilerplate 23 is classified as a boilerplate—a nonfunctional spacecraft or payload used as a test article within the aerospace industry. It falls under the broader classification of spacecraft while also being categorized as a test article, a subclass used specifically for evaluation purposes rather than operational missions. The term "boilerplate" in spaceflight contexts refers to these mass simulators that replicate the physical characteristics of functional spacecraft without their operational capabilities. The entity has several aliases including BP-23 and Apollo Test Capsule 23, reflecting its designation within NASA's testing program. This classification system allowed NASA and its contractors to track and manage multiple test articles throughout the Apollo development program, each serving specific evaluation purposes. ### Historical Context and Development Boilerplate 23 was developed circa 1964 during the early to mid-1960s, a period of intense spacecraft development and testing for NASA's Apollo program. The United States was engaged in a competitive space race with the Soviet Union, and the need for rigorous ground testing was paramount to ensure mission success while minimizing risks to astronaut lives. McDonnell Aircraft Corporation, the manufacturer, was one of NASA's primary contractors for crewed spacecraft development. The company had extensive experience producing aircraft and was selected to develop the Mercury and Gemini spacecraft before contributing to Apollo hardware. The construction of Boilerplate 23 represented part of this broader contracting relationship. The timing of BP-23's development (1964) places it during a crucial phase of the Apollo program when NASA was transitioning from initial design concepts to hardware testing. This period saw multiple boilerplate test articles manufactured to support various testing scenarios, including pad abort tests, launch abort tests, and structural load evaluations. ### Physical Specifications and Construction Boilerplate 23 was constructed from steel, providing the necessary structural properties to simulate the load-bearing characteristics of an operational Apollo command module. The use of steel rather than the aluminum alloys used in flight hardware reflected the test article's purpose—it needed to withstand repeated loading cycles and handling without deforming, providing consistent test conditions throughout multiple evaluation phases. The dimensions of BP-23 were specifically chosen to match the expected configuration of the Apollo command module: 127 inches (322.58 centimeters) in height and 154 inches (391.16 centimeters) in diameter. These measurements corresponded to the full-scale mockup requirements for accurate testing of ground handling equipment, launch vehicle integration, and structural load distribution. The artifact's weight, while not explicitly specified in the source material, would have been calibrated to match the mass properties of the operational spacecraft at various stages—empty weight, loaded weight, and maximum takeoff weight—to enable accurate simulation of flight dynamics during testing. ### Testing Applications and Purpose As a boilerplate test article, Boilerplate 23 served multiple testing functions within the Apollo program. Its primary role was as a mass simulator, providing engineers with a physical representation of the spacecraft's dimensions and mass characteristics for integration testing with launch vehicles and ground support equipment. Structural testing represented another critical application. By subjecting BP-23 to simulated launch loads, vibration profiles, and environmental conditions, engineers could identify potential structural weaknesses in the design before committing to flight hardware manufacturing. This testing methodology reduced program risks and costs by catching design issues early in the development cycle. The test article also supported procedures development for ground handling, transportation, and launch operations. Personnel could practice spacecraft mating operations, access procedures, and emergency response scenarios using the nonfunctional boilerplate, ensuring smooth operations during actual mission preparations. ### Collection and Preservation Boilerplate 23 is currently housed in the collection of the National Air and Space Museum, one of the world's premier aerospace museums operated by the Smithsonian Institution. The artifact's Smithsonian ARK ID is nv92bd7221f-6f50-4dc2-8ab0-1009cafc55c3, and its resource ID is nasm_A19800181000, enabling researchers and curators to track and manage the item within the museum's extensive collection. The artifact has also been exhibited at the U.S. Space & Rocket Center in Huntsville, Alabama, associated with the designation SA-500D. This location is significant because Huntsville—often called "Rocket City"—was the center of Apollo rocket development, home to NASA's Marshall Space Flight Center and where much of the rocket technology that carried astronauts to the Moon was developed. The coordinates of the artifact's location (latitude 34.710598, longitude -86.657051) place it in the Huntsville area, reflecting its historical connection to the region's central role in the Apollo program. ### Relationship to Other Apollo Test Articles Boilerplate 23 exists within a family of Apollo program test articles, each serving specific testing purposes. The broader boilerplate lineage includes: - **Boilerplate 29**: Developed circa 1965, used for later-stage testing - **Boilerplate 30**: Another Apollo test article from the same era - **Boilerplate 1101A**: Developed circa 1965 with specific configuration changes - **Boilerplate 1102A**: Developed before 1968, representing later design iterations These test articles collectively supported the Apollo program's extensive ground testing requirements, with each version potentially incorporating design changes learned from previous testing phases. The progression from BP-23 through later boilerplates demonstrates the iterative development process that characterized the Apollo program. ### Manufacturing Heritage McDonnell Aircraft Corporation's role in producing Boilerplate 23 reflects the company's broader significance in American aerospace history. The company, founded in 1939 in St. Louis, Missouri, became a major defense and aerospace contractor, producing military aircraft during World War II and the Korean War, as well as pioneering jet fighters for the post-war era. For NASA's crewed space program, McDonnell produced the Mercury spacecraft (the first American crewed spacecraft), the Gemini spacecraft (the first two-person spacecraft), and contributed to Apollo program hardware. The company's expertise in aircraft manufacturing translated effectively to spacecraft development, and their boilerplate test articles represented an important part of this heritage. McDonnell Aircraft Corporation eventually merged with Douglas Aircraft Company in 1967 to form McDonnell Douglas, which was later acquired by Boeing in 1997. The legacy of spacecraft manufacturing continues within Boeing's current operations, though the original McDonnell Aircraft identity has been absorbed into the larger aerospace conglomerate. ### Technical Significance in Spacecraft Development The boilerplate testing methodology exemplified by Boilerplate 23 represents a fundamental approach to spacecraft development that continues in modern space programs. By creating nonfunctional replicas for testing, engineers can validate designs, identify problems, and refine procedures without the expense and risk of operational hardware. This approach was particularly crucial during Apollo because the program's unprecedented technical challenges—landing humans on the Moon and returning them safely—required extensive validation of every system. The boilerplates served as physical prototypes that could be tested, modified, and retested as needed, providing confidence in the final flight hardware. The specific dimensions and construction of BP-23, replicating the Apollo command module's characteristics, enabled accurate testing of launch vehicle integration, ground handling equipment design, and structural load distribution. Without such testing, the risk of discovering problems during operational missions would have been significantly higher, potentially endangering astronaut lives and wasting substantial resources. ### Modern Relevance and Legacy The legacy of Boilerplate 23 and its fellow Apollo boilerplates extends into modern spaceflight practices. Contemporary spacecraft developers continue to use test articles, qualification units, and mockups to validate designs before operational missions. SpaceX, for example, has produced qualification units for their Dragon spacecraft, directly continuing the boilerplate tradition established during Apollo. The preservation of artifacts like Boilerplate 23 in major aerospace museums also serves educational purposes, helping the public understand the extensive testing and development processes behind spaceflight achievements. These artifacts provide tangible connections to historical programs, making the technical challenges of Apollo accessible to visitors who can see the actual hardware—even nonfunctional test articles—that contributed to lunar missions. The National Air and Space Museum's collection of Apollo-era artifacts, including Boilerplate 23, represents an important resource for researchers studying the history of spaceflight and the engineering methodologies that enabled human exploration beyond Earth's atmosphere.