Sunny Swift Edition 25 - Spin Awareness

John FRANKLIN
John FRANKLIN • 23 September 2020
in community General Aviation
7 comments
6 likes

Low speeds, stalls, spinning… We are now exploring the edges of the aircraft’s flight envelope and learning new skills. This is a fantastic domain to explore, but there are some special precautions that Sunny will take you through to do it safely!  Happy landings!

Thanks to our safety partners at Aviaze we can again share with you Sunny Swift - The Movie. Watch the video and then follow the link to check out the different language versions of the cartoon - available in all EU languages. Share with your friends, print it out for your flying club notice board and help spread this important lesson as widely as possible.  

https://www.easa.europa.eu/newsroom-and-events/news/sunny-swift-slow-fl…

 

Checks Before Starting a Stall

There are different strategies/ approaches that you can use as a pilot before starting a stall or similar manoeuvres. 

APOS Safety Checks from Sunny Swift Edition 25

In Sunny Swift Edition 25 we highlight the APOS approach:

  • Altitude.
  • Position.
  • Orientation.
  • Sky Clear.

HASELL Approach from Switzerland

Additionally, after initial publication an additional approach was highlighted from Switzerland using the HASELL approach:  

  • Height.
  • Airframe.
  • Safety.
  • Engine.
  • Location.
  • Lookout.

Are you aware of any other approaches that are commonly used? Let us know in the comment section.

 

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Comments (7)

Nick Wilcock
Nick Wilcock

A good video for instructors to spot all the faults in Sunny's instruction!

'APOS' is an inadequate check. Here in the UK we use 'Height' (i.e. agl) 'Airframe' (configured for the stall to be practised), 'Security' (no loose pens, paper, maps, iToys, etc, - and harness secured), 'Engine temps/press (will be running at low power for quite a while, then at max power when recovering, so Ts and Ps MUST be safe), 'Location' (clear of active aerodromes, built-up area, controlled airspace and danger areas) - and finally a good LOOKOUT above and below through at leat 180 deg.

Entry to the stall should emphatically NOT be 'pitch up to the stall warner' - I note the VSI shows 500 ft/min in that cartoon! The aim should be to maintain straight and level flight noticing the speed is low and decreasing, the controls are feely sloppy, the attitude is more nose-up than normal and buffet might be felt....

Finally, a lot more emphasis should be given on recognising and recovering from a stall LONG before there's any idea of teaching spinning.

Elena Beatriz GARCIA SANCHEZ
Elena Beatriz GARCIA SANCHEZ

Thank you for sharing your experience. Please explain why stall exercises should be restricted to starting from level flight. The FAA Handbook Ch. 4 suggests exploring a range of scenarios, including climb. It indicates smoothly raising the nose and then holding the altitude. Aside from a possibly unrealistic scenario, what are the dangers of a too high pitch angle?

Nick Wilcock
Nick Wilcock

In my opinion, stalling should first be taught from level flight, clean configuration until the warnings and identification of a fully-developed stall have been learned by the student. That may take almost a complete exercise and should begin with recovery without power before the standard stall recovery technique for light aeroplanes is fully understood - full power and control column centrally forward until the stall identification ceases, whilst keeping the aircraft in balance - then maintain that attitude, then and only then level wings and acclerate until climb speed has been achieved.. Recovery at the incipient stage must be taught.

Later, recognition and recovery from a stall in the final turn or in the approach configuration can be taught, but recovery should then be at the incipient stage.

Stalling in the climb is only likely to occur when a pilot is trying to outclimb terrain, hence is likely to include a high power setting. If the stall is taken beyond the incipient stage, a wing drop is highly likely due to propwash effects.

As for the FAA, they also discuss something bizarre termed a 'whip stall' - which should never form part of a LAPL/PPL course!

John FRANKLIN
John FRANKLIN

It's always a difficult one to find enough detail to make a worthy story and make it all fit into one page at the same time. Especially where there are lots of different approaches to a situation or safety topic.

One of the most important things is to start a discussion about a specific topic and then to have all the different views that follow. We are preparing an update to this community site that will also enable a blog style approach that will enable us to explore things in much more detail.


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