In Lee Smiths April 2014 article on Visual Area Protection, I think there is an error. The diagram indicates that the 20:1 slope is the same as standard three degree VDA. My memory, Lee Smiths original Danger Below MDA? from March 2013, and my math indicate that 34:1 is the same as a three degree slope.
A 20:1 slope in visual area protection corresponds to approximately 2.86 degrees, which is distinct from a 3% slope.
Effective NEXRAD interpretation requires considering factors beyond just color intensity, such as storm movement, development (building/dissipating), altitude, and data delays, to avoid overly conservative flight decisions.
Maneuvering speed (Va/Vb) decreases with lighter aircraft weight because at lower weights, the aircraft is more prone to exceeding G-limit stresses than stalling in turbulence at a given speed.
ARCTAN(Height/Base)=Angle In Lee Smith’s April 2014 article on Visual Area Protection, I think there is an error. The diagram indicates that the 20:1 slope is the same as standard three degree VDA. My memory, Lee Smith’s original “Danger Below MDA?” from March 2013, and my math indicate that 34:1 is the same as a three degree slope.
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