quadrirotor
André MARTIN
- Joined
- Oct 30, 2003
- Messages
- 1,795
- Location
- Québec, Canada
- Aircraft
- airplane, trike, gyro, paramotor...
- Total Flight Time
- 350
For the pix above:
http://www.asra.org.au/forum/topic.asp?TOPIC_ID=457
For ref:
The performances and efficiency are documented:
Boyette: Rotocraft dec-jan 97-98 p.44.
Magni: Rotocraft dec-jan 00-01 p.27.
and others...
conclusions: better efficiency, better lift, less drag, less (no) vibrations, better flares, stiffer and cheaper blades, less fatigue, better sound and so on etc...
The scisor effect (lead-lag) is not well documented, it seems not to be a big issue for semi-rigid rotors.
Sportcopter solved this problem that exists even with two blades rotor...
Price=(may have changed...)
Sportcopter 25' 7"----> 1700$ X 2 = 3400$
Sportcopter 30' 8"----> 3900$ X 1 = 3900$
500$ cheaper with four blades! ok use them to have a heavier and more complex rotor head...
http://www.asra.org.au/forum/topic.asp?TOPIC_ID=457
For ref:
The performances and efficiency are documented:
Boyette: Rotocraft dec-jan 97-98 p.44.
Magni: Rotocraft dec-jan 00-01 p.27.
and others...
conclusions: better efficiency, better lift, less drag, less (no) vibrations, better flares, stiffer and cheaper blades, less fatigue, better sound and so on etc...
The scisor effect (lead-lag) is not well documented, it seems not to be a big issue for semi-rigid rotors.
Sportcopter solved this problem that exists even with two blades rotor...
Price=(may have changed...)
Sportcopter 25' 7"----> 1700$ X 2 = 3400$
Sportcopter 30' 8"----> 3900$ X 1 = 3900$
500$ cheaper with four blades! ok use them to have a heavier and more complex rotor head...
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