The 7.8 grams Microflyer is one of the smallest flying machines
ever, it is a one-off prototype and it is not intended for sale.
The Microflyer is a upgraded version of the 6.9 grams Proxflyer Micron that
was built both to prove that the new Proxflyer concept works for really
small helicopters and also as an answer to a challenge.
Microflyer - Pictures
Microflyer - Video