May 1, 2008
Understanding RPM
Whether you fly behind a fixed-pitch or constant-speed prop, a little knowledge definitely is not a dangerous thing
 It was just after 6 p.m. when I turned final for runway 4R at Honolulu International Airport. My 2,160 nm crossing from Santa Barbara, Calif., into the wind had required 13 hours and 15 minutes, yielding an average speed of 163 knots. I’d maintained 8,000 feet in the new Mooney Ovation for most of the trip, climbing up to 10,000 feet for the last 500 nm into Hawaii to take max advantage of the standard trade winds. |
The schedule was tight. Following a day on the slopes and an evening watching the Super Bowl, the pilot was a bit tired, but still had to contend with a 45-minute drive to the airport, a snowy instrument departure and a night flight to North Las Vegas Airport. He landed at VGT after the tower had closed and arrived at the hotel around 1 a.m. No rest for the wicked, however, as wake-up calls jolted him from bed in time for 7:30 meetings and a full day of walking through exhibit hall aisles. Then, after dinner at 6:30 p.m., he flew home, touching down on home turf at 3 a.m.
Right up front I should post a very clear caveat: Myths within any technological field almost always have a grain of, if not truth, at least enough fact that they have some ardent supporters who swear by them. (They “know” it’s true and can prove it because a friend of an uncle knew someone who had it happen to a cousin.)
It was 1985, and I was refueling a Cessna 425 Conquest I at Tenerife in the Canary Islands on my way to Johannesburg, South Africa. I’d instructed the fueler to fill the wing tanks first, then begin topping the three 110-gallon internal ferry tanks starting with the front tank. I turned away to fill out the necessary paperwork, heard the pump running for a few minutes and as I finished the fuel request, heard a sickening crunch behind me. 
We live in the best of times and the worst of times. Imagine flying with glass panels that allow you to visualize terrain, position, weather and traffic all at the same time. Fly coast-to-coast with only a nod to weather. Anytime, anywhere, faster than ever before.
The visibility isn’t the best going up the mountain pass. On the far side lies better weather and home. Behind are a tent, camp, cold and wet weather, and insufficient gas to go elsewhere. The pilot continues deeper into the pass, hoping conditions will improve. The ceiling is steady, but the terrain is rising. They’re headed south, and winds are westerly at 20 knots, with gusts. The pilot hugs the right side of the pass for traffic.