However, the certification standard does not require perfectly smooth air above Vno. This is because a stall is a form of aerodynamic relief and prevents additional maneuvering loads from being applied. Safety is unlikely to be compromised unless the houses are filling the windshield or the aircraft has undesirable stall characteristics. Now you might wonder how to know the strength of the next gust. Visualize the cause and maneuver to avoid the area. During studies conducted by Great Britain's Royal Air Force some years ago, it was determined that light turbulence can cause airspeed fluctuations of 5 to 15 knots.
Gulfstream G450 Abnormals
Of course once you put extend the flaps beyond 0 you become a 2. Digging deeper, you'll find that VA and VB are calculated for gross weight, but decrease at lighter weights. Top Menu Toggle navigation Main Menu. Fewer than forty feet of altitude change, either way, is what I saw. It had been a hot day, and by early evening, a forest of tightly packed cumulus towers stretched across eastern New England. In turbulence, airspeed isn't constant. Ours was a long, lazy, straight-in approach to runway 27R from the east, our nineteen-seater packed to the gills.
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turbulence penetration speed - PPRuNe Forums
The boxed area shows the normal flight envelope specific to that aircraft. Vb is the maximum speed at which the aircraft structure can withstand a 66 foot per second fps gust perpendicular to the flight path. Call this value x. A few more tips on V-speeds, where they come from, and how they apply to flight operations. There are often subtle clues to the onset of "some" turbulence, other than the obvious nasty coloured bits on the radar.
Description: BB code is On. I'm interested in this too. Each year worldwide, about a hundred people, half of them flight attendants, are hurt by turbulence seriously enough to require medical attention — head, neck, shoulder and ankle injuries being the most common. So turbulence that corresponds to a 20 knot gust factor should have us slowing down to or below our Gust Penetration Speed, Vb. Thu May 30, 9: