-
Making the Brazilian ATR-72 Spin
by
[sc name=”post_comments” ][/sc]
Note: This story was corrected on August 10th at 10:23 am, thanks to the help of a sharp-eyed reader.
Making an ATR-72 Spin
I wasn’t in Brazil on Friday afternoon, but I saw the post on Twitter or X (or whatever you call it) showing a Brazil ATR-72, Voepass Airlines flight 2283, rotating in a spin as it plunged to the ground near Sao Paulo from its 17,000-foot cruising altitude. All 61 people aboard perished in the ensuing crash and fire. A timeline from FlightRadar 24 indicates that the fall only lasted about a minute, so the aircraft was clearly out of control. Industry research shows Loss of Control in Flight (LOCI) continues to be responsible for more fatalities worldwide than any other kind of aircraft accident.
The big question is why the crew lost control of this airplane. The ADS-B data from FlightRadar 24 does offer a couple of possible clues. The ATR’s speed declined during the descent rather than increased, which means the aircraft’s wing was probably stalled. The ATR’s airfoil had exceeded its critical angle of attack and lacked sufficient lift to remain airborne. Add to this the rotation observed, and the only answer is a spin.
Can a Large Airplane Spin?
The simple answer is yes. If you induce rotation to almost any aircraft while the wing is stalled, it can spin, even an aircraft as large as the ATR-72. By the way, the largest of the ATR models, the 600, weighs nearly 51,000 pounds.
Of course, investigators will ask why the ATR’s wing was stalled. It could have been related to a failed engine or ice on the wings or tailplane. (more…)
-
How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
by
[sc name=”post_comments” ][/sc]
In June 2023, the FAA published a 167-page document outlining the agency’s desire to replace dozens of 40-year-old airport control towers with new environmentally friendly brick-and-mortar structures. These towers are, of course, where hundreds of air traffic controllers ply their trade … ensuring the aircraft within their local airspace are safely separated from each other during landing and takeoff.
The FAA’s report was part of President Biden’s Infrastructure Investment and Jobs Act enacted on November 15, 2021. That bill set aside a whopping $25 billion spread across five years to cover the cost of replacing those aging towers. The agency said it considered a number of alternatives about how to spend that $5 billion each year, rather than on brick and mortar buildings.
One alternative addressed only briefly before rejecting it was a relatively new concept called a Remote Tower, originally created by Saab in Europe in partnership with the Virginia-based VSATSLab Inc. The European technology giant has been successfully running Remote Towers in place of the traditional buildings in Europe for almost 10 years. One of Saab’s more well-known Remote Tower sites is at London City Airport. London also plans to create a virtual backup ATC facility at London Heathrow, the busiest airport in Europe.
A remote tower and its associated technology replace the traditional 60-70 foot glass domed control tower building you might see at your local airport, but it doesn’t eliminate any human air traffic controllers or their roles in keeping aircraft separated.
Inside a Remote Tower Operation
In place of a normal control tower building, the airport erects a small steel tower or even an 8-inch diameter pole perhaps 20-40 feet high, similar to a radio or cell phone tower. Dozens of high-definition cameras are attached to the new Remote Tower’s structure, each aimed at an arrival or departure path, as well as various ramps around the airport.
Using HD cameras, controllers can zoom in on any given point within the camera’s range, say an aircraft on final approach. The only way to accomplish that in a control tower today is if the controller picks up a pair of binoculars. The HD cameras also offer infrared capabilities to allow for better-than-human visuals, especially during bad weather or at night.
The next step in constructing a remote tower is locating the control room where the video feeds will terminate. Instead of the round glass room perched atop a standard control tower, imagine a semi-circular room located at ground level. Inside that room, the walls are lined with 14, 55-inch high-definition video screens hung next to each other with the wider portion of the screen running top to bottom.
After connecting the video feeds, the compression technology manages to consolidate 360 degrees of viewing area into a 220-degree spread across the video screens. That creates essentially the same view of the entire airport that a controller would normally see out the windows of the tower cab without the need to move their head more than 220 degrees. Another Remote Tower benefit is that each aircraft within visual range can be tagged with that aircraft’s tail number, just as it might if the controller were looking at a radar screen. (more…)
-
Cessna’s Tom Aniello Talks Wide-Body Details
by
[sc name=”post_comments” ][/sc]
If you’ve been a regular Jetwhine reader, you know we seldom cover breaking news.
Today is an exception for a number of reasons.
Just a few minutes after Cessna’s vice president of marketing Tom Aniello briefed his sales force with the just released details of the new Cessna Wide Body business aircraft – the Columbus – Addison Schonland from IAG and I spoke to Tom about the excitement surrounding the airplane. My guess is pilots and passengers are going to love this one. Cessna is happy to have one more member of the family too I’ll bet.
The second reason we’re really excited here in Chicago is that this represents another new podcast from Jetwhine. Here’s our podcast of the Cessna interview.
Cessna also went live today with details of the Columbus on the Cessna.com web site.
Watch out airlines. Here comes another competitor.
Technorati tags: Cessna Aircraft Company, Cessna Columbus, business aviation, air travel, pilots
-
A Jet Powered by French Fries … Almost!
by
[sc name=”post_comments” ][/sc]
By Scott Spangler – scott@jetwhine.com
Learning that Green Flight International had made its first jet flight powered by bio fuel in October 2007 shouldn’t have surprised me, but it did. After all, turbines were all the rage when I was growing up in the 1950s and “60s, and I was suitably impressed that they would run on anything that burned, kerosene, gas, perfume, so why not bio-diesel? Somehow it seems fitting that the GFI test aircraft is a 1968 Czechoslovakian L-29 Delfin trainer and its stock single-stage turbojet engine.
Being good test pilots, they started with a mix of jet and biofuel and worked their way up to the October’s 100-percent vegetable oil flight, which climbed to 17,000 feet. In May of this year Green Flight and its partner, Biodiesel Solutions, will start their high-altitude tests, starting at 24,000 feet and working their way up to 40,000 feet. From my truck driving days I remember that diesel doesn’t do well when it’s real cold out, and it seems that biofuel wants to become gelatin when the temps head to zero and below. It will be interesting to see how they deal with this, heated tanks or blending bio with jet fuel or other additives.
If the high-altitude flights go well, the team is planning an eight-city cross-country flight, and a trip to AeroShell Square at EAA AirVenture 2008. Their really big adventure is planned for 2009, a 22,000-mile bio-flight around the world in a Lear 25. I’m sure they will learn lots, deal with the technical challenges that arise, and make the flight, and that in itself is worth the effort.
But bio-flight won’t go beyond experimental use until it is available at airports everywhere, and that’s not going to happen until some company – like McDonald’s perhaps – realizes their old French fry oil is worth big bucks.
Technorati tags: AirVenture, alternative fuel, Green flight international, L-29 Delfin, pilot, Scott Spangler, Jetwhine
-
Jetwhine Welcomes a New Voice: Scott Spangler
by
[sc name=”post_comments” ][/sc]
Do you know this fellow?
Scott Spangler and I recently met for the first time at a Starbucks in Oshkosh, land of each summer’s AirVenture . Although this was our first meeting in person, Scott and I have corresponded by letter, e-mail and phone calls for over a decade. He’s the former editor of EAA’s Sport Aviation magazine.
Funny how this industry has a way of bringing people together even after all that time. I remembered Scott as the guy who granted me permission to run one of his excellent editorials about the flight training industry in the first edition of a book, Professional Pilot Career Guide. When I was editor at IFR Refresher magazine, I also recalled that he was smart enough to tell me he hadn’t flown in the clouds in years when I tried to recruit him as a writer there.
But we always stayed in touch. Now that Jetwhine has grown beyond the ability of one beleaguered writer – that would be me – I am really pleased to have Scott add his voice to our industry chorus.
He’ll be adding his two cents about a wide variety of topics, flight training, sport aviation and perhaps even the occasional glimpse of new flight technologies. I’m trying to get him to tell me more about the powered parachutes I see buzzing around at AirVenture each summer. These are akin to the motorized backpacks my friend Norman Rhodes at The Digital Aviator keeps telling me about.