In cargo airdrop systems, impact attenuation is crucial in ensuring payload survivability while allowing practical impact speeds. Traditionally, for large bundle airdrop operations ranging from several hundred to tens of thousands of pounds, cardboard honeycomb is the standard attenuation material used. However, cardboard honeycomb is far too stiff to function well on small 5-50lb payloads.
Earthly Dynamics used a test rig integrated with a computer vision system and custom payload mounted sensors to reliably replicate landings and measure their characteristics. Impact tests were conducted under various combinations of horizontal and vertical impact speeds with alternative attenuation materials that are more suitable for lightweight systems. To learn more about the experimentation process and the documented results, read the published paper below!
Experimental Characterization of Impact Attenuation for Small Payloads
Impact Video Playlist
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Candidate Attenuator: Honeycomb Cardboard
Candidate Attenuator: Soft Polyester Foam
Candidate Attenuator: Impression Foam
Candidate Attenuator: Impression Foam with Mesh Bag
Candidate Attenuator: Sliced Bread