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Rotary Wing Geek

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  • Planning to fail – The perils of ignoring your own advice

    Planning to fail – The perils of ignoring your own advice

    22 July 2025
    Aircraft Operations

    “How on earth did I get here?” IMC, 36 kg of fuel in the main tank before minimums and facing a lengthy period of radar vectoring to get lined up for an approach. I had planned in detail, applied Threat and Error Management (TEM) and been supported by the rest of the company along the…

  • 2D or not 2D – How much room do I need to land a helicopter?

    2D or not 2D – How much room do I need to land a helicopter?

    10 July 2025
    Aircraft Operations, Helicopter Emergency Medical Service (HEMS)

    Introduction Following a few recent accidents with aeromedical helicopters, I thought it is time to take a look at what makes a good landing site for a helicopter. I am going to focus on helicopters being used for aeromedical evacuation (in Europe called “Helicopter Emergency Medical Service – HEMS”) as that is the most likely…

  • What is your left hand doing?  How to fly a 3-axis autopilot on helicopters

    What is your left hand doing? How to fly a 3-axis autopilot on helicopters

    22 June 2025
    Aviation Technology, Helicopter Design

    Introduction Some helicopters fly beautifully without any flight control automation or stabilisation systems. The Gazelle was one such aircraft and a reasonably competent pilot could achieve amazing accuracy in IMC with just basic instruments. However, in this modern age, automation has become the norm and in many operations, being coupled up to an autopilot is…

  • My tail rotor pitches when it flaps!  Why?

    My tail rotor pitches when it flaps! Why?

    22 June 2025
    Aviation Technology, Helicopter Design

    This is one for the helicopter pilots and engineers in my network. I thought I knew why the tail rotor blades pitched when they flapped and what delta 3 hinges were all about on helicopters. Right up to the point I stopped to look carefully at the tail rotor on the Bell 429 I currently…

  • Practical ILS explanation for pilots – the surprising way they really work

    Practical ILS explanation for pilots – the surprising way they really work

    22 June 2025
    Aviation Technology

    For all of my flying career I have been given a standard explanation about how an ILS works. In the military it was described in accordance with RAF Publication AP3456 and in civilian life it was described in the ATPL exams and associated training material. With some minor differences, it is described as a pair…

  • Slow Down! Are you speeding on the ILS?

    Slow Down! Are you speeding on the ILS?

    19 June 2025
    Aircraft Operations

    When we are flying around, unless you are flying old school IFR at very low level (I Follow Roads), there are no posted speed limit signs. There are some speed limits with respect to weather limits in the Rules of the Air but when you fly in cloud they do not apply and we can…

  • It’s behind you! Helipads and obstacles in the backup area

    It’s behind you! Helipads and obstacles in the backup area

    5 June 2025
    Helicopter Emergency Medical Service (HEMS)

    Designing hospital helipads so they are safe and efficient is a fine art. A growing body of guidance is provided by the aviation authorities to help with delivering effective capability from day. However, some of the guidance is currently flawed; there is an assumption that bigger helicopters are the most restrictive when actually it’s what…

  • EC135, Checklists and the “Red Button of Doom”

    EC135, Checklists and the “Red Button of Doom”

    2 June 2025
    Helicopter Design

    Introduction The EC135 SAS DCPL or SAS/AP CUT button is a red semi-guarded button on the head of the cyclic used to disengage all elements of the AFCS and stabilisation system simultaneously (both names for the button are used by Airbus in the Flight Manual and Pilot Check Lists (PCL)).  The button is present on…

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Rotary Wing Geek

Rotary Wing Geek

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