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Spin Awareness and Spins

A spin is a stall that has been allowed to yaw. The one that matters is not the one you brief at altitude — it is the skid on the turn from base to final, where there is no height left to trade for a recovery.

Slow Flight, Stalls and Spins — FI.X.I

Why this one is taught on the ground first

Two ingredients, and neither of them does it alone. The wing has to be stalled and the airplane has to be yawing; when both are true the two wings stop lifting equally and the airplane rotates itself down a corkscrew path. Everything below comes back to those two ingredients.

So the lesson leads with recognition and prevention. The recovery procedure is the last line of defense rather than the first, and in the pattern — eyes on the runway instead of on the ball, a few hundred feet up — it is a defense you may not have the room to use.

Settle one thing before the aerodynamics. Spins are instructor-demonstrated maneuvers, and so is the cross-control stall that leads into them. They belong at altitude, in an airplane approved for them, with a qualified and spin-current flight instructor in the other seat. Nothing on this page is a clearance to go and try one on your own, and a student pilot has no business practicing either of them solo. Read the rest as preparation for a flight with an instructor.

How a skidding base-to-final turn builds a spin

Picture the classic case. You are turning left from base to final, you see you are going to overshoot the extended centerline, and rather than bank more you press left rudder to tighten the turn. The nose swings inside the turn — that is a skid.

The skid speeds up the outside wing, which is already the high wing. Moving faster, it makes more lift, and the airplane wants to keep rolling into the turn. You do not want more bank this close to the ground, so you hold it off with opposite aileron. That deflects the aileron on the low, slow, inside wing down, which raises that wing's angle of attack even further. Now the wing that is already flying slowest is the one closest to the critical angle. It stalls first, drops, and the rudder you are still holding yaws the airplane the same way. That is the entry to a spin, and it happened with the nose nowhere near the pitch attitude you associate with a stall.

Run the same overshoot as a slip — too little rudder, nose outside the turn — and the tendency is different. The raised wing carries the down aileron and stalls first, and when it drops it tends to roll the airplane back toward level and toward coordinated flight. That is a tendency, not an outcome. A cross-controlled stall in a slip still departs, it can roll over the top instead, and the handbooks treat both cross-controlled conditions as pattern-altitude killers. At three hundred feet on final, the difference between them is only which way the first roll is likely to go, and that is a thin thing to be relying on.

This is why instructors are so insistent about the ball on the turn to final, and why the cross-controlled stall gets demonstrated at altitude with an instructor: so you have already seen what your airplane does when a wing lets go while it is yawing.

The four phases

The entry is where you supply the ingredients. The incipient phase runs from the first rotation until the spin settles, while the aerodynamic forces come into balance — for a light training airplane the Airplane Flying Handbook puts that at roughly four to six seconds, about the first two turns, which is a figure for that class of airplane rather than a property of spins in general. This is the phase you are really training for, because an unintentional spin is recovered here or not at all. The developed spin is equilibrium: rotation rate, airspeed and vertical speed all stabilized, flight path nearly vertical. Recovery is breaking the stall and stopping the rotation.

How readily an airplane spins, and how readily it comes out, depends on power, weight, loading and what you do with the controls. A center of gravity toward the aft limit makes recovery worse, and adding power in a spin makes it worse still — power can flatten the spin and delay or defeat the recovery.

Telling a spin from a spiral dive

They look similar from the seat and the fix for one makes the other worse. In a spin the wing is stalled, so airspeed stays low and roughly steady near stall speed. In a spiral dive the wing is flying, so airspeed is increasing, and increasing fast. If you pull on an already-stalled wing you tighten the spin; if you apply spin recovery to a spiral you accelerate toward Vne. Read the airspeed indicator before you read anything else.

Know which of the rest of the panel to believe. The attitude indicator may tumble, the heading indicator goes with it, and the ball in the inclinometer is not a reliable reference in a spin. The turn instrument is the one that keeps working: when the outside references are ambiguous, the turn needle or turn coordinator is what the FAA teaches you to use to confirm which way you are rotating, and full rudder goes opposite the direction it shows. A turn needle answers to yaw alone and so holds up either way up; a turn coordinator answers to roll as well, which makes it dependable in the upright spin you are likely to meet. Back that up with the outside world and with the altimeter and VSI unwinding.

Recovery — PARE

  1. Power to idle.
  2. Ailerons neutral.
  3. Rudder full opposite the direction of rotation.
  4. Elevator briskly forward, toward about the neutral position, far enough to break the stall. How far that is varies from type to type and even between spins in the same airplane, so the travel you fly is the one your POH specifies — not simply everything the control has.

Hold those inputs until the rotation stops. Then neutralize the rudder — leave it in and the airplane can start spinning the other way — and recover from the resulting dive with a smooth pull, without exceeding Vne and without giving away more altitude than you have to. Your POH is the authority throughout: if the manufacturer publishes a different procedure for your airplane, that one wins.

The stall must be fully broken before you pull. Pulling early gets you a secondary stall, and at that point you are recovering from the recovery.

Before an intentional spin

Everything in this section assumes an instructor. Intentional spins are flown with a flight instructor who is qualified and current in them, in an airplane the manufacturer approves for them, and the preparation below is the briefing you sit through with that instructor rather than a checklist you work through by yourself.

Check that the airplane is approved for intentional spins — the AFM or POH has to say so, and the weight and balance you are actually flying at matters too. Normal category airplanes are not approved for intentional spins; utility category airplanes may be. Check the parachute question as well: under 14 CFR 91.307, a pilot carrying anyone other than a crewmember may not intentionally exceed 60 degrees of bank or 30 degrees of pitch unless each occupant is wearing an approved parachute, and the exception that covers spin training is a narrow one — spins and other maneuvers required by the regulations for a certificate or rating, when given by a certificated flight instructor. A spin flown outside that, for enjoyment or to stay sharp, is not covered by it. Read the section itself before you plan on the exception.

Then clear the area, brief the recovery and the abort point out loud before you start, and pick an altitude floor and honor it. The published figure for spins is AC 61-67C's: spin avoidance, incipient spins, spin entries, spins and spin recoveries are practiced from an entry altitude above 3,500 feet AGL. Do not borrow the stall numbers for this. The 1,500 feet AGL single-engine and 3,000 feet AGL multiengine figures you were taught are the recovery floor for stall practice, and a spin block planned around them starts far lower than the guidance for spins intends. Treat 3,500 feet as a floor rather than a target, and note that a higher minimum in your POH, your school's operating rules or your instructor's brief is the one that governs. Density altitude is worth checking before a warm-day block, though not for the reason it is usually given — the controls answer to indicated airspeed, so their effectiveness at a given indicated airspeed is the same whatever the density altitude. What a hot, high day costs you is real feet: true airspeed and rate of descent are higher for the same indications, so the spin consumes more altitude per turn, and the climb back up to the block is slower. Check it when you plan the flight.

What goes wrong

Almost all of it is human rather than aerodynamic. The startle of a sudden unusual attitude produces freezing or a reflexive pull, which is exactly the wrong input. Fixation on one instrument or on the runway hides the airspeed decaying and the yaw building. Distraction and workload — a radio call, traffic, a rushed pattern — are what put the airplane in the skid to begin with.

The mechanical errors are just as predictable: missing the impending stall entirely, hesitating during the recovery, misusing rudder or elevator, holding aileron into the spin, and confusing a spin with a spiral dive. As an instructor, add your student's readiness to that list — fatigue, stress and how the last flight went belong in the go/no-go for spin training alongside the airplane's paperwork.

One more that belongs to the certificate rather than the airplane. An applicant for a flight instructor certificate with an airplane or glider category rating needs a logbook endorsement for spin training before the checkride, under 14 CFR 61.183(i). It does not reach every instructor certificate — an instrument instructor applicant, for one, is outside it — but the examiner will expect any instructor candidate to teach the aerodynamics and the recovery on the ground whether or not a spin is demonstrated in the air.

Where you meet it next

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