Aerobatics in a Pretty Sky

Here are clips from a recent aerobatic flight in the Extra 300L. More videos available at my YouTube channel, BruceAirFlying.

Beautiful Day to Fly in Seattle

Here are some excerpts from an aerobatic flight with a German 747 captain who is also an active light aircraft pilot. We explored basic aerobatics on a beautiful late-summer day in Seattle.

Aerobatic Ride on a Summer Morning

Stalls at “Any Attitude, Any Airspeed”

Every pilot learns that a wing can stall “in any attitude and at any airspeed.”

But it’s difficult to demonstrate that principle in a typical training aircraft. This video of an exercise that I do with my stall/spin/upset recovery students shows the value of training in an aerobatic aircraft.

I fly a basic loop, but at several points during the maneuver, I intentionally increase the angle of attack by pulling back abruptly on the stick. Each time I pull, the angle of attack quickly reaches the critical angle of attack, and the airplane shudders in an accelerated stall, regardless of the airplane’s airspeed or pitch attitude relative to the horizon.

In other words, you can change the airplane’s attitude (and its angle of attack) almost instantly, but changing its flight path requires more time. That difference between the attitude and the flight path is angle of attack, and when that angle exceeds the wing’s critical angle of attack, the wing stalls.

It’s also helpful to remember that a loop is just a vertical turn. The same principle applies when you bank the wings and turn an airplane in the horizontal plane. If you pull back on the yoke or stick during a turn, you increase the angle of attack. Pull back too aggressively, and the wing will reach its critical angle of attack and stall, regardless of the indicated airspeed.

Simulated Wake-Turbulence Encounter

I do the exercise below with my stall/spin/upset students to simulate the disorienting effect of a wake-turbulence encounter. We perform 1-1/2 aileron rolls to inverted and then push and roll to recover to normal upright flight. The exercise is confusing at first, and the nose always drops well below the horizon during the “upset.” It’s a great way to help pilots understand what could happen if they were caught in a wintip vortex.

Wake turbulence caused by wingtip vortices is major hazard to small aircraft.

WakeTurbulence

The wingtip vortices are a by-product of lift. You can find detailed information about wake turbulence in FAA Advisory Circular AC 90-23 and in the Aeronautical Information Manual (Chapter 7, Safety of Flight; Section 3, Wake Turbulence).

 

 

 

Short Aerobatic Videos

I have collected short excerpts from a recent aerobatic flight near Seattle, WA to demonstrate a few basic aerobatic maneuvers. Each video shows the maneuver first from the left wingtip and then from my perspective in the rear cockpit of the Extra 300L.

You can find many more videos at my YouTube channel, BruceAirFlying.

Early Summer Aerobatic Ride

Here are highlights from an early summer aerobatic ride in the Extra 300L east of Seattle.

The passenger from Switzerland enjoyed the view of the “Cascade Alps” east of Seattle as we flew through a series of aileron rolls; loops, half-Cuban 8s; big, lazy barrel rolls; slow rolls; hammerheads, and a little inverted flight.