Dragonfly 4CH

[Cichi revo]

certo che questo mi spinge parecchio :

http://cgi.ebay.com/4CH-Walkera-BIG-...QQcmdZViewItem

• mproved version! This is the 2006 version with a lot of adjustment and improvements.
• 4 Channel remote control set includes complete Forward/Backward, Left/Right, Up/Down control (RUDDER, AILERON, ELEVATOR, AND THROTTLE)
• New Look Transmitter, New Look Cabin, Improved Mixer/Gyro Control, More Stable Flight, even first timer can control easily
• Powerful 2 x 370 carbon brush motors with strong anti-wind ability
• Separate servos from mixer, more precision movement
• More stable flight, even first timer can control easily
• Coaxial counter-rotating blades cancel out the rotational torque that makes hovering a conventional helicopter so difficult.
• Precise controlling and hovering
• SUPER STABLE X-ROTATION SYSTEM, Easier to control than Original LAMA Dual counter rotating rotor which eliminates the need for a tail rotor
• Reliable high quality mixer with built-in gyro board
• Factory Pre- assembled, zero assembly time
• Pre-positioned servo mounts for easy set up
• Dual counter rotating rotor which eliminates the need for a tail rotor
• Rudder is controlled using variation in speed of each level of the rotor blade
• High Quality mixer + gyro board built-in
• The Sliding swash plate can help you operate the R/C Helicopter Freely
• Newly Designed Rotor Head gives better control
• Digital Proportional Motor Speed Control
• Suitable for Indoor/Outdoor/Backyard/Park
• Powered by 1200mAh Li-polymer battery. Longer flight time.
• The main rotor blades are using top quality plastic materials, which is not easily break
• Approximately 15 minutes flight time on each charge - Optional Li- poly battery will help to achieve better performance and longer flight time
• Best choice for Beginner - Advanced hobbyist
• Can be hovered with so much ease, you can do it with only one hand. Your Kid will LOVE it, Good for any Age group, Male or Female

certo che il prezzo sale ... 149 + 75 dollari ... per un DF ?

[Cichi revo]

ma i feedback del tipo fanno cagare

[Cichi revo]

questo e' un colco pero'

http://cgi.ebay.com/Colco-Apache-AH-...QQcmdZViewItem

ma 50 GBP di sped ...

[Cichi revo]

questo invece e' motorizzato 2*370

http://cgi.ebay.com/Walkera-Dragonfl...QQcmdZViewItem

ma perche' : gyro NOT USED ?

[Cicciotabs]

il giroscopio non è usato perche semplicemente per le pale controrotanti non serve ... le pale controrotanti gia da sole bilanciano le forze che tenderebbero a far pirolettare l'eli ... il giroscopio e' un sensore collegato al rotore di coda che fornisce piu o meno coppia alle pale di coda cercando sempre di mantenere la coda dell'eli stabile altrimenti senza il rotore un eli normale tenderebbe a diventare appena staccato da terra un frullino .... mi sono capito e ti sono spiegato?

[Cichi revo]

certo ciccio ...

ma allora come mai lo stesso modello (piu debole) .. doppia pala .. con i 2*130 .. e 2*180 .. ce l'ha ?

http://cgi.ebay.com/ws/eBayISAPI.dll...MakeTrack=true

• Easy to control and extremely stable flight
• Coaxial structure
• 2 X 180 carbon brush motors
• Easy to control and stable to fly
• 4 CH transmitter and 3-in-1 receiver
• Gyro adjustment to sensitivity
• 7.6g servos and inside gyro

[Cicciotabs]

tieni presente che tenere fermo immobile un eli in volo e' come cercare di mantenere ferma una cosa su un pallone da calcio quindi immagino che il gyro su un eli con pale controrotanti serva a mantenere la coda ultriormente piu stabile ... dico immagino perche come ho detto ho preso direttamente un eli normale