WestWing From United States of America, joined Feb 2005, 2146 posts, RR: 7
Reply 3, posted (6 years 9 months 2 weeks 1 day 19 hours ago) and read 2968 times:
I'm sure there was a model pterodactyl with flapping wings which flew about 25 years ago. It was featured in an IMAX film at the National Air and Space Museum in Washington DC. In fact the original model used to hang just outside the IMAX theater at NASM, when the theatre was still the Langley theatre. The model crashed and "died" during a demo flight at Andrews AFB and the newspaper report called it a "Pterrible Ptragedy". So I do not think the hummingbird is the first.
The best time to plant a tree is 40 years ago. The second best time is today.
Prebennorholm From Denmark, joined Mar 2000, 7112 posts, RR: 53
Reply 4, posted (6 years 9 months 2 weeks 1 day 19 hours ago) and read 2901 times:
This one is not an ornithopter.
An ornithopter simulates the forward flight of a bird. The flapping and twisting of the wings produces nothing but forward thrust to overcome drag - substitutes the propeller on an ordinary aircraft. In all other ways an ornithopter flies as an ordinary airplane.
This one is able to hover like a helicopter and does not rely on a tail to stabilize flight. It flies more like an insect - or as birds in hovering flight. Most mainly smaller birds can hover, at least for short periods of time, enough for vertical takeoff and landing. But an ornithopter cannot.
AeroVironment was founded by famous Dr. Paul MacCready. He became a World Champion with sailplanes some fifty years ago, and he continued to develope a lot of fine stuff for the glider community.
He designed the first human powered aircraft - the Gossamar Albatros - which crossed the British Channel with bicycle pedal power alone. He later produced a similar, man carrying plane with also crossed the the British Channel using electric power from solar cells alone.
He died two years ago at age 82.
Always keep your number of landings equal to your number of take-offs