Closure to “Discussion of ‘A Review of Propulsion, Power, and Control Architectures for Insect-Scale Flapping Wing Vehicles’” (Helbling, E. F., and Wood, R. J., 2018, ASME Appl. Mech. Rev., 70(1), p. 010801)

The authors of the review article “A Review of Propulsion, Power, and Control Architectures for Insect-Scale Flapping wing Vehicles” [1] greatly appreciated the commentary by Dr. S. K. Gupta [2]. We believe that he has identified numerous practical considerations that were not covered in depth in our review and that nicely complement our review such that, in aggregate, the two present a complete picture of the challenges and opportunities for developing and deploying autonomous insect-like vehicles. In particular, Dr. Gupta highlights the need for payload and flight time that are adequate for a desired mission or scenario. This brings up an inherent conundrum in the design of any flying vehicle (i.e., greater mission duration requires more onboard energy storage, leading to more massive storage device and a commensurate increase in required thrust to compensate, also increasing energy consumption; thus, increasing mission duration while keeping vehicle size...