Category Archives: Systems

Discussions primarily focusing on helicopter systems and components – particularly relating to the Robinson R22 and R44 helicopters.

Vibrations in Helicopters

Vibrations in helicopters are to be expected. But when a new vibration appears or an existing vibration gets worse – what should you do? How should you describe it to a mechanic? Learn more by watching this video on the Helicopter Vibrations.

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Helicopter Vibrations Video

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R22 Main Rotor Yoke Cracking – AD 2000-20-51

In 2000 an airworthiness directive (AD) was issued by the FAA for R22 helicopters concerning cracking on the main rotor yoke half assemblies. I thought any reference to ‘yokes’ was referring to yokes on the main transmission shaft running from the main gearbox, to the freewheel unit and onto the tail. But this AD is actually talking about cracking on the yoke up above the swashplate on the main rotor shaft (see Figure A).

They should have been replaced by Jan 2001, so check your aircraft logbooks against the details outlined in the AD below.

And now you know there is more than one type of yoke on an R22!

More resources

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Turbine Helicopters

Nothing sounds as cool as a turbine helicopter starting up.  Learn about turbine helicopters like the Robinson R66 or the Bell 206 series by watching this video on the Helicopter Turbine Engine.

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Turbine Engine Video

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Piston Powered Helicopters

Most small training helicopters (Robinson R22, Schweizer 300, Enstrom 280, etc) use relatively inexpensive piston engines. To learn more about piston powered helicopters and how that engine type works, see this video on the Piston Engine.

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Piston Engine Video

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Helicopter Anti-Torque Systems

Tail rotor, Fenestron or NOTAR- they are all ways to counter the torque of a helicopter main rotor. Learn more by watching this video on Helicopter Anti-Torque Systems.

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Anti-Torque Systems Video

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DIfferent types of Helicopter Rotor Configurations

One main rotor and a tail rotor – the Traditional or Conventional approach, but what about the other designs? Tandem, Transverse Coaxial, Intermeshing and Quad – learn more watching this video on Helicopter Rotor Configurations.

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Main Rotor Configurations Video

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How a Helicopter Swashplate works

How do the cyclic and collective control inputs translate to the rotor disk? Find out how by watching this video on how a helicopter swashplate works.

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Helicopter Swashplate Video

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Rigid, Semi-Rigid or Fully Articulated Main Rotor Systems?

Helicopter rotor systems are defined by the way the blades connect to the rotor hub. Do you know the difference between Rigid, Semi-Rigid and Fully Articulated? Learn more by watching this short video on Helicopter Main Rotor Systems.

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Main Rotor Systems Video

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How to fly a Helicopter?

Before your try to fly a helicopter, you first need to fully understand how the flight controls work. Click here to watch a video on how to fly a helicopter.

 Click to watch a video on Helicopter Flight Controls

Helicopter Flight Controls Video

Most small training helicopters require both hands and feet on the controls most of the time and as you make one input other inputs are usually required in addition/response. I’d describe flying a training helicopter as like patting your head, while rubbing your tummy, whilst balancing on a beach ball on one foot and holding a conversation. 🙂 But like many things, it all comes together with practice.

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