Posts Tagged ‘density altitude’

Just ahead in the July issue

Tuesday, May 21st, 2013

GliderWhat great summer trips are you planning this year? What hot-weather issues confound you as you progress through your flight training? Our July 2013 issue, just off to the printer, touches on weight and balance, density altitude, and nailing your best glide speed in the event of an engine failure.

  • Weigh in: Why You Should Calculate Weight and Balance—Every Time: Your instructor makes you calculate weight and balance, but it shouldn’t become one of those “I’ll never need to do this again” situations once you become a certificated pilot. In fact, it will become even more critical for you to go through the calculations, as you’ll learn in this article.
  • Just Like the Real Thing: Moving Training Toward Reality: When you start training with real-world situations in mind, that simulated short-field landing on a longer runway gets a little more challenging.
  • Glider Pilot for a Day: How Fast to Fly When The Engine Quits. We take some tips from the folks for whom an engine-out is an every-day occurrence—glider pilots.
  • Technique: Short-Field Takeoff: When you absolutely, positively must get off the ground quickly.

There’s a lot more, of course, so keep an eye out for your digital edition–hitting your device May 28–or your paper copy, arriving in your mailbox after June 6. Happy reading and safe flying!—Jill W. Tallman

 To get a free six-month membership to AOPA and receive six free issues of Flight Training magazine, call 800-USA-AOPA or visit our website. To switch your paper subscription to digital, visit our website.

The Idaho crash video: This is density altitude

Monday, August 13th, 2012

If you live in the flat lands like I do (303 feet above sea level), you’ve heard about the effects of high density altitude–but maybe it’s still a tough concept to grasp. The air’s less dense so there isn’t as much lift? Huh? AOPA’s aviation subject report puts it like this: “On a hot and humid day, the aircraft will accelerate more slowly down the runway, will need to move faster to attain the same lift, and will climb more slowly.” (There’s a lot more information in the subject report. It’s worth your time to review it, and your CFI will give you a gold star.)

A pilot and three passengers in Idaho have provided us with probably the most compelling, graphic display of high density altitude’s effect on aircraft performance that you could ever hope to see. Please be advised that while all four in the aircraft survived the crash, disturbing footage of the pilot’s injuries appears at 5:20. Click here for the video. Student pilots: You’ll note that the aircraft takes a long, long, long time to lift off from the runway, which was near the Frank Church River of No Return Wilderness.  

The preliminary NTSB findings for the accident are here.–Jill W. Tallman