vortex ring state for eggbeaters
vortex ring state for eggbeaters
(OP)
A nice look at trying to figure out VRS, with a rather glaring disparity between real world and maths.
https://www.mdpi.com/2226-4310/9/2/61
https://www.mdpi.com/2226-4310/9/2/61
Cheers
Greg Locock
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RE: vortex ring state for eggbeaters
IIRC, older helicopter design textbooks (Jacobs, Johnson) describe the VRS in detail and provide empirical charts to allow designers to select parameters that minimize it so that pilots are less likely to operate in ways that can enter it.