Thinking about designing multirotors to optimizing flight time

Designing electric multicopters for a specific flight time is a complex multidisciplinary optimization problem. This short blog post is some of my thoughts on how to think about this problem. Obviously, there so many different ways of doing this and welcome suggestions and other constructive discussions. From an energy conversion standpoint, multirotors is a pretty simple systems. Energy is available from the batteries which is routed via ESCs to the motor and the propeller.  The challenging part is that batteries do not always provide the same efficiency(energy). They are dependent on the power draw (watts,current). For most batteries, the higher the current you draw from the battery, the lower the total-energy available from them. This is mainly due to the internal resistance of the batteries…

From http://diydrones.com/xn/detail/705844:BlogPost:3320622

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https://worldbydrone.wordpress.com/2019/10/03/thinking-about-designing-multirotors-to-optimizing-flight-time/

From https://jefffraley1.blogspot.com/2019/10/thinking-about-designing-multirotors-to.html

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https://jefffraley.wordpress.com/2019/10/03/thinking-about-designing-multirotors-to-optimizing-flight-time/

From https://angelahill0.blogspot.com/2019/10/thinking-about-designing-multirotors-to.html

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https://angelahill0.wordpress.com/2019/10/03/thinking-about-designing-multirotors-to-optimizing-flight-time/