How was that measured? Was it corrected for wind? What was the pilot weight, empty weight and gross weight?-in practice=auer KASPERWING (160 kg /16.7 m^2) can fly horisontally with 5 m/s speed...
I understand Yours opinion=12 mph is hard to measure=I would love to see a video of the Kasper Wing flying along side a person jogging with a wind sock or flag in the background.
=experimentally achived Specific Thrust of simple,rectengular fan was 1900 N/ HPif were talking about a totally different propulsion system like flapping wings then this opens up a whole new category of flying machines and new possibilities.
BRILLIANT, good find, THANKSThis is a super video to watch when trying to figure out how wingtip feathers work for birds. It is a 360° video. You can turn to see wingtip, nose or tail. Super handy! sadly not all wingtip feathers visible due to "elbow" in wing.
=dr Sorokodums investigation=all big feathers have equall specific resonance freguency...=26 Hz.Is this a mass spring frequency or a flutter frequency?