We instrumented Endurance with accelerometers at key locations, then applied a small sinusoidal force through a sting shaker to excite the vehicle's natural frequencies and mode shapes. This was the structural data we needed to ensure lander safety at launch. The data we collected did two things: it proved Endurance won't dynamically interact with New Glenn's low-frequency body modes during launch and it validated our structural model with real-world test data. This also marked the first integration of Endurance, the flight New Glenn separation system, and a flight-equivalent GS2 payload adapter stacked together, making the configuration as flight-like as possible.
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