Stop the Cycle | Michelle “Mace” Curran
Stop the Cycle | Michelle “Mace” Curran
A common problem new pilots struggle with is avoiding a PIO or pilot-induced oscillation. So how do we Stop the Cycle as We’re all familiar with the concept of overcorrecting in a car. A deer runs out, you’re driving tired, you’re near the edge of the road, and you yank the wheel the other direction just to end up in the opposite ditch.
In an aircraft, we have control and performance instruments. The PIO comes into play when the pilot chases the output they want on the performance instrument (altitude, airspeed, heading) by making erratic and too large corrections on the controls instruments (rpm, fuel flow, attitude).
For example, I’m 100′ above my target altitude, so I push the nose of the aircraft down to descend. However, the correction I put in was too large or left in for too long, and now I pass my target altitude and find myself below it and needing to climb back up. As a new pilot, this can be a very frustrating struggle and makes you feel like you’re always a step behind. That’s because you are. You are chasing a result rather than making a small change, being patient, and assessing.
One of the most challenging places to avoid a PIO is when you’re flying formation. Now you aren’t just chasing an airspeed and altitude target, but an exact position relative to another aircraft that is also constantly moving in three dimensions. When I was new to the Thunderbirds, I had already been flying the F-16 for eight years. However, the type of flying you do on the team is much different from anywhere else in the Air Force. I found myself in PIOs regularly during those first few months of training.
Our natural reaction in this situation is to let the stress build and to try even harder to fix the problem. I would find my arm going numb because I was gripping the stick so hard, even though in the F-16, it only moves ¼”. Trying to fly precisely while you’re sweating bullets, irritated with your lack of proficiency, and with a numb hand that feels like it doesn’t belong to you is challenging to say the least. The harder I would try to control the aircraft, the more my arm would turn into a cement block and the more frustrated I would become.
In your business, it is easy to also find yourself in a PIO, letting one negative experience cause you to sabotage future interactions and pull your organization from one extreme to the other. For example, you get feedback that a customer is unhappy. You change company policy as a result, only to find a few months later, that there are second and third-order negative effects you didn’t anticipate. You had a bad experience with an employee that had a few very apparent personality traits. In response, you only hire people opposite of this bad actor. A year later, you find your team suffering from groupthink and lacking diversity.
So how do we prevent finding ourselves fighting a PIO?
See something that needs correcting? First, stop it from trending in the wrong direction. Maybe that is enough. Sometimes you only need to remove an input without adding one to counteract it. Need more? Make a slight adjustment then be patient. Pause… see what it gives you, what change in performance you gradually get, then adjust further if needed. Over time you develop rules of thumb, so you know exactly how much input you need and when you need to take the adjustments out to land right on the performance you’re targeting, but this will take patience and practice.
Finally, I want to share something I was told when I first learned to air refuel. Getting airborne gas is just another form of flying formation, but your aircraft is touching the other plane this time. To hook up to the refueling boom and stay there, you must make exact adjustments in your position. This is another challenging skill and one that commonly results in over corrections and the dreaded PIO. The advice I had been given when learning to do this for the first time?
Don’t forget to wiggle your toes.
This simple shift of focus allows you to breathe, relax your arm, and loosen your grip. Suddenly, the PIO stops, and you can maintain your position. Sometimes you have to accept what is in your control and what isn’t, wiggle your toes, and relax your grip.
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