2021 Reflection

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The MoonRanger A-team invested a quarter century of effort in 2021. The impressive accomplishments positioned MoonRanger for successful build, test and delivery in 2022. 2021 highlights included:   Mechatronic Crafted the composite flight chassis Machined some flight components at CMU Procured sensors, devices, actuators, and other flight components Documented assembly procedure Built a device for precision … Continued

Roving Hammer Testing

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Figure 1: Inverted chassis prepared for hammer testing A roving hammer test is the simplest way to determine natural frequencies of a structure. The structure is tapped with a small hammer, and the resulting frequencies are sensed through instrumentation. It is a bit like striking a bell and sensing the frequency of its vibration by … Continued