The Pioneer 2 spacecraft NASA launched to Venus was a multi-unit system. The core bus was designed to release a series of probes that would fall through the planet’s atmosphere, gather data all the way down until they impacted the surface. The first to be released as the large probe weighing slightly more than 697 pounds. It would in turn release three smaller probes. The smaller probes were sufficiently small that they didn’t need any parachutes to cushion their fall through Venus’ atmosphere, but the larger, heavier probe did need one. Part of NASA’s pre-launch parachute testing for this mission involved drop tests with a scale model spacecraft, and in at a time when funding was starting to dwindle, the VAB’s 526-foot ceiling makes it a fantastic, indoor, wind-free, and cost-efficient drop-test facility.