The content discusses the wing deployment and retraction mechanisms in beetles, particularly the rhinoceros beetle (Allomyrina dichotoma). It explains that unlike birds and bats, which use well-developed pectoral and wing muscles to control their wing movements, the wing deployment and retraction in beetles is achieved through a more passive mechanism.
In the case of the rhinoceros beetle, the wing deployment process involves the complete release of the elytra (hardened forewings) and partial release of the hindwings at their bases. This triggers a spring-like partial release of the hindwings from the body, allowing the clearance needed for the subsequent flapping motion that brings the hindwings into the flight position. After flight, the beetle can use the elytra to push the hindwings back into the resting position, further strengthening the hypothesis of passive deployment.
The content also validates this passive deployment mechanism by demonstrating its implementation in a flapping microrobot. The microrobot was able to passively deploy its wings for stable and controlled flight, and then retract them neatly upon landing, showcasing a simple yet effective approach to the design of insect-like flying micromachines.
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by Hoang-Vu Pha... a las www.nature.com 07-31-2024
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