Saturday, August 21, 2010

Picoflyer, smallest RC helicopter ever build


Picoflyer is the smallest size electric powered contra-rotating coaxial-rotor RC helicopter ever built. It is battery powered and it uses the Proxflyer concept to give it inherent stability. It is built to test how small helicopters using the passively stable rotor concept could be.

It weighs only 3.3grams and its rotor diameter is 60mm. This is 72mm long. Main motor is only 4x8mm and employs plastic gears.1 x 3.7 V, 30 mAh Didel cell which weighs about .86 grams is used as battery.It uses ATMEL ATtiny26L microcontroller for controlling purposes.Communication is done via 3 channels custom Plantraco 900 MHz radio control.With all these stuffs integrated it could acheive a flight time of about one minute.

Because of the new Proxflyer concept, this helicopter is much simpler and has much fewer parts than other model helicopters. The helicopter is passively stable in hover and during forward flight and has no need for cyclic control. It is controlled vertically, in yaw (rotation) and forward speed. It is operated via an 900 MHz radio link, however, due to its small size and no aid from electronic sensors it is rather difficult to control precisely in the air.



STABILITY: Most other "stable" model helicopters, including some toy helicopters from i.e. Asia, achieve some kind of stability by utilizing centrifugal forces and gyroscopic effects to keep the rotor and helicopter horizontal at all times, thus preventing it from entering into oscillations or becoming unstable. The Proxflyer, however, uses a different approach (patented). In stead of trying to keep the rotors in a horizontal plane, they are arranged in an innovative way so that they do the complete opposite. Triggered by the smallest horizontal movement, the rotors tilt up, creating a horizontal force stopping the motion almost before it starts. The helicopter is kept at the exact same position relative to the surrounding air. The Proxflyer concept gives the helicopter incredible stability, but limits the maximum horizontal speed. The concept, without relying on centrifugal forces alone, give the rotors good and quick stability with respect to the rotor shaft as well, and it will therefore let the helicopter move in the same direction as it is tilted by the small horizontal tail propeller.

Key benefits of the helicopter:


  • Absolutely stable without the use of any gyros or autopilots
  • There are no servos, actuators, rods, links, gears or other moving part
  • The whole helicopter is operated and controlled by 3 electric motors
  • Forward flight is achieved by tilting the helicopter with the tail propeller
  • The rotor blades are encircled by a ring that supports and protects them
  • It is very efficient, all the power is used to generate lift
  • It is silent, the mechanical drives and the rotors generate very little noise
  • There are no vibrations
  • It is safe

3 comments:

PMF IT SERVICES said...

Hi,

I am interested in assembled helicopter. Can you tell me where available all parts of helicopter. Please give reply on following mail id:- pankajfalak@gmail.com & rahulnikam86@ymail.com

Anil C S said...

I am sorry I dont have more details on it. What I did was , just share the news I read from the site http://www.proxflyer.com/

Enrique Iglesias said...

I see the superlative contents on your blogs and I perfectly enjoy going through them.
RC Helicopter Reviews

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