Airmanship

Its not unheard of to think thunderstorms are only a product of summer weather, like were experiencing now in the Northern Hemisphere. Certainly they are more common in warmer months, but wintertime thundersnows are common enough that Ive seen a few. The point is that we can encounter thunderstorms any time of year, not just in the summertime. The kinds of weather Mike Hart discussed in last months article, Air Mass Storms, principally are warm-weather phenomena, while thunderstorms associated with frontal activity can be experienced year-round.

Sitting around and talking with pilot friends, you hear nonstop talk about aircraft and equipment. Eventually, someone always brings up ATC in conversation. Pilots argue among themselves more intensely than Socrates debating Plato. One question that new and even veteran pilots bring up is why, when they file an IFR flight plan, that their clearance is usually never as filed but includes a route change of some sort.

In the decade-plus since the coming ADS-B mandate became a thing for U.S. aviation, those whose operations will be affected have fallen mainly into two camps: early adopters and those who put it off as long as possible. In this binary world, I freely admit to being something of an early adopter. And despite some cool-and less expensive-new gear on the market, Im happy with my choice to equip with ADS-B in 2016. Its likely those who have taken a wait-and-see attitude also are happy.

Everything we do in life carries risk. An undesired outcome often is influenced by factors we cant control-someone running a stop sign, for example, or a perfectly good engine deciding to fail. But many other risks of a specific activity can be anticipated. Its why we wear a helmet when riding a bicycle, or earn our instrument rating if we regularly fly an airplane beyond the traffic pattern. Serving as a pilot in command offers many ways to increase our risks, but it also brings opportunities to mitigate them.

I used to ground myself when I saw a forecast of thunderstorm weather. I had an immediate visceral response rooted in memories of growing up in Kansas, seeing vast tornado-spawning squall lines, their blue-green tint indicating they were pregnant with hail. At age 11, I watched a barn across the road explode in one of those storms, flying in pieces across the fields, followed by a barrage of baseball-sized hail. Surely you cant fly when convective weather and thunderstorms are nearby or on the way, can you? Well, Dorothy, sometimes you can. You just need to know what to look for and what to avoid.

The only time Ive performed what I consider to have been a for-real high-altitude takeoff, it went fine. I was at Albuquerque, N.M.s Double Eagle II airport, elevation some 5800 feet. It wasnt the middle of summer, but it was a warm, sunny fall afternoon. I dont recall which runway I used, but it offered more than enough length for my Debonair, which carried only me, some gear and full fuel. As Id been trained, I leaned the engine before the takeoff and let the airplane fly itself off the runway. I handled it gently until gaining enough airspeed to establish a proper climb and I had some altitude.

And like every other technology, autopilots have their limitations. For one, they have to be set up correctly-along with the navigation equipment-to reliably follow a heading and descend along a glidepath. Details like when to take over from the autopilot, how you might handle an equipment failure-if you notice it-and even whether to let Otto fly the missed approach or do it yourself need to be worked out ahead of time. Thats the short version of why we might want to consider hand-flying the approach. Lets expand on them.

One way to deal with this torrent of poorly presented information is to call Flight Service, ask for an abbreviated briefing and query the briefer about Notams for your proposed flight, and especially if theres any new FDC Notam affecting the airspace or procedures you anticipate. Listen to the briefer; there might be some nuggets you didnt know about. And at least youll be on the record when FAAs enforcement apparatus asks you about a TFR bust. -J.B.

Receiving inspection of new air filters (p/n P107336) revealed three out of four had a defective sealing surface, causing the sealing/mating surface to crack and crumble. This defective sealing surface could potentially enter the engine. The defective filters sealing surface has a light-gray color while the replacement filters we received, inspected and found to be in serviceable condition had a dark gray, almost black sealing surface. Suspect that the defective filters had improper material on the sealing surface or were improperly cured.

Remember that propeller blades are airfoils moving in a plane different from and usually perpendicular to the direction of flight. As an airfoil, the amount of lift the blade creates when moving through the air depends on its angle of attack, and its angle of attack-plus drag-can depend on a variety of factors, including the airplanes pitch attitude. Remember, too, that the outer portions of long prop blades move faster-they cover greater distance in the same amount of time-than shorter ones.