June 05, 2011

3 Stages of Recovery

So today, I worked on Exercise 14 (Spirals) and Exercise 15 (Slips). I again got to do the takeoff, and I got a bit of an intro on what I'll be doing the next couple of flights (Circuit work). I'm also getting much better at the radio procedures, and I'll discuss the radio procedures for taxi and take-off in the next post.

To begin, you have to first know that a Spiral is much different than a Spin. A spiral can be described as a steep, descending turn in which airspeed, rate of descent and wing loading increase rapidly. The main difference between a spin and spiral is that in a spin, the airspeed tends to remain constant and low, but in a spiral, the airspeed is continually increasing, which is why it's important to recover as soon as possible, as not to overspeed the aircraft.

Your instructor will enter the spiral for you after you perform your HASEL check. To recover, there are 3 stages that must be performed separately, or else the wing loading could exceed far beyond maximum limits. First, you must reduce power to idle, to make sure that airspeed does not continue to increase because of the engine. Next, using your ailerons (don't use any rudder), roll the wings level by using ailerons to the side opposite of the spin direction. Finally, gently ease out of the dive. When the airspeed is reduced to the normal range, you can add power again.

The next exercise is slips. Slips are usually used during the approach to landing. The purpose of a slip is to increase your descent rate without increasing your airspeed. A slip can also be used to correct for any cross-wind on your approach to land. Before you slip, you will usually reduce power (to about 16" Manifold Pressure in Katana), and add flaps. To enter a slip, apply aileron to one direction and apply rudder to the opposite direction. To recover, simply neutralize the controls, retract flaps and increase power back to normal settings.

After you have completed all the exercises up to this point, you will most likely begin circuit work (take-offs, landings, circuits, overshoots, emergency procedures). You will be in the circuit until your first solo, which will also be in the circuit.

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