Spiral dive
Sometimes called graveyard spiral and often confused for a spin but the aircraft in a spiral dive is not stalled, its descending with a low nose attitude and high airspeed. Much like a steep turn that ended up descending very fast.
Spiral dives are really important. Now that we've learned the “lay of the land”, let's go through the scenario again in a little more detail.
Spiral Divergence
When an aircraft has too much static directional stabiles (or weathercock stability) in comparison to the dihedral effect spiral instability arises.
Spiral Dive
An ever-tightening downward corkscrew flying path.
Spiral Stability ...
Spirals Around a Point
Start at least at 3000' AGL
Use constant approach to landing speed
Expect a wind shift during descent
--Use 90 degree arc checkpoints
Works great using ADF around a radio tower ...
Spiral: A continuous banked turn made during a glide with the engine stopped or "ticking-over".
Spiral Instability: A particular case of lateral instability, in which the banking angle is always too great, causing side-slipping.
[edit] Spiraling Slipstream
[edit] Non-aerodynamic criticality
On certain aircraft, hydraulic, pneumatic or electrical systems may be powered by one engine. This engine would therefore be critical in this respect.
Graveyard spiral. The illusion of the cessation of a turn while still in a prolonged, coordinated, constant rate turn, which can lead a disoriented pilot to a loss of control of the aircraft.
Rapid descending spiral.
PRESS
Directive to continue the attack; mutual support will be maintained. Supportive role will be assumed.
I Was In a Graveyard Spiral. Help! Dear Rod,
Last year I did something very stupid. I'll skip the details. I'll just say I entered IFR conditions shortly after takeoff (500ft AGL) and was unprepared for it.
Climbs and that Dastardly Torque (supporting role by spiraling slip stream)
Torque is often blamed for the sudden turn to the left, when the tail is picked up on a tailwheel airplane, but precession is actually the villain there.
aircraft because the helicopter derives its source of lift from the rotor blades rotating around a mast. The word 'helicopter' itself, adapted from the French hélicoptère, originates from the Greek words elikoeidēs (helical or spiral) ...
EXPANDIG SQUARE SEARCH
A pattern of progressively larger squares (a "square spiral") followed for searching the ground from an aircraft; Compare: creeping line search, secto...
The Washington Monument, a 555-foot-high masonry obelisk, was opened in 1888. It has 898 spiral steps--but, thankfully, you can take an elevator up.
Drag is sufficient to keep speed from building excessively, even if a pilot gets into a graveyard spiral (though it's hard to imagine how one could do that in a Skyhawk).
The Geodetic body is a much more complex version of fuselage design. Geodetic fuselages use an arrangement of flat strips of wood that are wound spirally around a main frame, sort of like weaving a basket.
control, the cable passes over a drum having a series of grooves cut into it to form a continuous spiral around which the control wire is wrapped.
Because it is more desirable for the aircraft to have "spiral instability" than Dutch roll tendencies, most aircraft are designed with that characteristic.
Some pilots don't fly a traffic pattern, they just sort of spiral into the approach, but I like to fly a rectangular traffic pattern so that all the things that go on during approach occur at their normal time.
check-If your airplane is IFR equipped within the preceding 30 days the VOR equipment must be operationally check in accordance with FAR 91.171. Remember you should also maintain a record in the airplane of this. I have always used a small spiral ...
This device contains a bimetallic spiral spring which, when heated by an electrical current with the engine running, will slowly cause the choke to open.
It is safer to come closer to the field before turning downward for two reasons: first, because you may not be gliding at the best gliding angle; because you can always kill extra height by a spiral or two better than you can regain it.
 See also: Flight, Pilot, Aircraft, Plane, Direct
  
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