Note: Supersedes AFM , Aircraft performance engineering, December Physical Description: 1 v. (various pagings): ill. ; 27 cm. Locate a Print Version. 37 Afm. 24 10 10 S»1menced 9 9 Arm. 9s 11 90 4 91 Afm. 9 19 10 9 51 9 91 29 52 19 18 l 6 5 v19 58 3 2 3 F Battle of Hohenlinden, 7 49 3 51 9 54 ; 7 24 55 l 4 2o 1 4 l l 4 S 52 sets Mm. aji. 7 5° 3 51 9 3° ‘:8 37 Afm-.
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Always remember that Eddie, when you get right down to it, is just a pilot. He tries to give qfm the facts from the source materials but maybe he got it wrong, maybe he is out of date. Sure, he warns you when he is giving you his personal techniques, but you should always follow your primary guidance Aircraft manuals, government regulations, etc.
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EAUC & BFE The complete guide AFM 59-1
It will be our loss, but I understand the need to protect creative rights. To answer another frequent question: Gulfstream has been very good about all of this provided I add the note shown below. Let me be clear about this: I think the world of Gulfstream Aerospace.
There is no prettier wing in existence than what you see on a GV or G and the best cockpit I’ve ever touched is in my trusty G It resulted from an intense analysis of adverse weather airflows, motivated by the loss of several aircraft, and made possible by current weather technology.
As you may know, an aircraft’s ability to maintain lift is dependent on aerodynamic flow, airspeed, and movement within an air mass. Jet streams, independent air mass movement, and airflow in and around thunderstorms provide an environment where an aircraft can almost instantaneously transition from one air mass to another. This is wind shear.
The effect of wind shear is similar to the effect of wind gusts, except it can be much more severe. It can increase or decrease airspeed until engine thrust has no opportunity to reestablish the proper airspeed within the new air mass. Further, it can increase or decrease airspeed by the difference in velocity between the two air masses.
At high speeds, the aircraft could exceed its maximum design airspeed limit, or at low speeds it could stall. This is a valid technique for dealing with a shear caused by one air mass sitting atop another. It should not be employed when dealing with convective activity, especially a microburst, where the magnitude of the speed loss or gain can be unpredictable.
Let’s assume that an aircraft is on final approach at a safe margin above stall speed. Further assume that we have a knot headwind on this approach and that the aircraft is flying within this air mass at knots indicated airspeed.
If this aircraft transits a wind shear into another air mass that suddenly gives up the knot headwind, the indicated airspeed instantly would drop from knots to 75 knots and the aircraft will stall.
In preparation for transiting this wind shear, we increase approach speed by the amount of the predicted loss. After penetrating the shear, airspeed will immediately reduce to the approach speed.
We predict this airspeed loss by making a comparison between the reference groundspeed and the actual approach groundspeed. We compute reference groundspeed by applying percent of the reported runway winds to the approach true airspeed.
We compute an approach groundspeed by applying percent of the actual winds at approach altitude to the approach true airspeed. Any significant difference between these two groundspeeds is reason to expect a wind shear. Obviously, the headwind must decrease by 40 knots by the time the aircraft reaches the runway. This can happen gradually or in a matter of seconds. If the pilot maintains approach speed plus the groundspeed difference 40 knots in this casetransiting the wind shear will reduce airspeed by 40 knots to the desired approach speed.
The first time I saw this technique was in the 1-CB-1 and it didn’t last long there. The Air Force became concerned pilots would believe windshear can be beat and instead preached a “When in doubt, go around” philosophy.
AFM makes a rather clumsy attempt at explaining it, perhaps we can do better. Wikimedia CommonsPublic Domain Artwork. Toggle navigation Top Menu. Top Menu Toggle navigation Main Menu.
Characterization of spherical domains at the polystyrene thin film–water interface
Adrian Eddie’s In Box: Craig Eddie’s In Box: Ivan Eddie’s In Box: M Eddie’s In Box: Attitude determines altitude 2. Bloom where you are planted 3. Gravity always wins 8. Integrity amf Loyalty There is only so much you can do. Perfect is the enemy of good. Trust but verify Sometimes thoughts are best unspoken The angle of the view When you don’t know what to do, do the work in front of you.
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Minimum groundspeed technique, from Eddie’s notes.