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Making the Brazilian ATR-72 Spin
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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…)
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How the FAA Let Remote Tower Technology Slip Right Through Its Fingers
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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…)
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Review: YouTube’s Ward Carroll, F-14 RIO
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A pandemic addiction to YouTube has delivered consistently interesting, entertaining, and educational interludes when its selection algorithm introduced me to Ward Carroll, a retired naval flight officer who spent most of his career as a radar intercept officer, aka RIO, in the F-14 Tomcat.
Based on my past searches and binges, YouTube’s algorithm served up “21 Cringeworthy Errors in the Movie TOP GUN.” This film sustained me during my recovery from Hepatitis A in 1987. Having worn out my VHS copy that summer, I’d noticed a few errors, and I was curious to learn what I missed, and I had 9 minutes and 35 seconds to spare.
It was a worthwhile investment of time, and I subscribed to Carroll’s channel when the episode concluded. I won’t spoil, but I will tease. What hooked me was his conversational finite detail. Only someone intimately familiar with the F-14 would know the dimensions of the Tomcat’s vertical stabilizers and that they would have tangled with the fuselage of the “MiG” in the famous inverted dive scene where Maverick “communicated” with the bogey’s pilot.
Intrigued by its title, I cued up “The REAL Truth About Kara Hultgreen’s F-14 Tomcat Mishap.” In the same conversational style I learned about that the F-14A was prone to compressor stalls and how that affected the Tomcat aerodynamically. But what got me to ring his channel’s notification bell was a discussion and display of the BOLDFACE recovery steps that aviators must memorize because these NATOPS procedures “are written in blood.”
For those unfamiliar, NATOPS is the Naval Air Training and Operating Procedures Standardization, the Navy’s aircraft specific general flight and operation instructions. Safety seems to be a consistent theme in many of his episodes, and this made sense when explaining “RIO Responsibilities” using examples from his career. It turns out he did a tour as editor of Approach, “The Navy and Marine Corps Aviation Safety Magazine.”
Having interacted with a number of aviators during my six years’ service in the Navy, I respected their abilities, but I have new respect for RIOs and their successors, WSOs (weapon systems operators, pronounced “whizz-oh”) after Carroll expanded my knowledge and understanding of their duties and responsibilities. And he’s earned my respect and admiration for not spewing an endless stream of Mil-speak and aviation jargon.
But I guess that’s not surprising, given that Carroll is also a novelist published by the Naval Institute Press. (The Punk’s War trilogy is now on my to-read list.) When he utters an acronym, he spells it out in English, and as applicable, he gives a topic deeper context by relating it to a scene in Top Gun or other film. (Don’t miss “The Truth About the F-14 and Goose’s Death.”)
Carroll’s YouTube channel will satisfy more than an individual’s Tomcat curiosity. It offers valuable insight for anyone interested in pursuing military aviation, including those considering the US Naval Academy or US Military Academy. A 1982 graduate, and later in his career an instructor at the Naval Academy, his episode on “The Real Story Behind the West Point Cheating Scandal” is a concise summary of a challenging educational environment that any prospective student should watch before seeking an appointment.
But I’ve gone on too long here. Check out Ward Carroll’s channel for yourself. I’m going to see what he has to say in “Chuck Yeager and True American Greatness.”
If you enjoyed this story, why not SUBSCRIBE to JetWhine, if you haven’t already, and please share it with anyone who might find it interesting. — Scott Spangler, Editor
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AirVenture 2021: Like Starting From Scratch
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Covid’s disruption of uninterrupted participation at EAA AirVenture Oshkosh in 2020 was (we hope) a one-time disappointment. Like any break in a desired routine, resuming the activity is often like starting again from scratch. Whether you are flying in or driving, don’t rely on the mental muscle memory developed over a decade or more of previous Oshkosh adventures. Prepare now for the new AirVenture routines. Don’t be that person who hinders the efficient flow of traffic because they arrived oblivious to the changes.
If you are flying in, get the EAA AirVenture Oshkosh 2021 NOTAM now! The link gets you the 32-page PDF for free! Read it. Highlight the changes. Read it again as part of your preflight briefing before launching for Oshkosh in July because things have changed, starting with the NOTAM’s effective dates. This year it becomes effective at 1200 Central Daylight Time on July 22, 2021 and expires at 2000 Central Daylight Time on August 1, 2021.
On the plus side, the taxiway that becomes Runway 18L/36R during the show is now 60-feet wide. On the negative side (especially if you still rely on solely VOR navigation), the FAA has decommissioned Falls VOR/DME (FAH) at Sheboygan, Wisconsin, and Kankakee (Illinois) VOR/DME (IKK). On the just different side, the FAA has added a number of transitions to the Fisk Arrival. When the controllers use them to ease holding and congestion, they will announce them on the Oshkosh Arrival ATIS. Don’t be surprised by them; read about each of them in the NOTAM, each with a Not for Navigation Chart.
Those of us driving to Wittman Regional Airport need to be just as diligent in our preparation because EAA has changed the incoming traffic flows for exhibitors and civilians. And just to make things interesting, they have changed up the parking lots. To expedite parking, EAA is also selling advance auto parking online at $10 a day (or member-only for $60 a week). Paying for parking at the gate will cost you $15 a day in hard cold cash. Volunteers will be on duty at 0600, and they WILL NOT ACCEPT CREDIT OR DEBIT CARDS FOR PARKING.
You can get into all the public lots (Brown, Gray, Yellow, and Pink) from Poberezny Road, and EAA recommends exiting Interstate 41 at Highway 26 (Exit 113) south of the airport. The Gray lot is new; it fills the space south of the Media Check-in Quonset Hut on Waukau Ave., The Blue lot is now designated the D Lot and reserved for public vehicles with state-issued disabled/handicapped license plates or hang tags. Entering from Knapp St., which runs along the North 40 fence line, exhibitors will now park in the G Lot, which fills the fields between road and fence line that is the western border of homebuilt camping and eastern shoreline of Lake Louise by the Memorial Chapel.
To reduce conflicts with pedestrians, EAA has eliminated the parking lots that require specific permits to use, such as the media parking lot where I usually start my day at AirVenture. I haven’t found or heard or seen anything that gives me a hint where I’ll need to go, so I guess I’ll learn that when I pick up my credentials on Zero Day (Sunday, July 25). I hope to see you there.
If you enjoyed this story, why not SUBSCRIBE to JetWhine, if you haven’t already, and please share it with anyone who might find it interesting. — Scott Spangler, Editor
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Preflight Weather Briefings: Words vs. Pictures
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When preparing for a flight, it would be a safe assumption that pilots never consider their dominant learning style when ferreting out the information for their preflight weather briefing. Time, technology, and the recently published Advisory Circular 91-92, Pilot’s Guide to a Preflight Briefing, has made an individual’s learning style a key factor in acquiring—and understanding—this critical information because they can now seek out the sources of information best suited to their needs.
There are four fundamental learning styles—visual, auditory, read & write, and kinesthetic—but you can divide them into words and pictures. Visual learners prefer, and learn best from images, maps, and graphics. Auditory learners best acquire new knowledge through the spoken word. Read & write learners gain information from seeing words. Kinesthetic learners best understand something new by getting hands-on, which is an impractical process for a preflight weather briefing. Going outside might work okay for a local flight, but they will have to adapt their learning style when going cross-country.
There was a time when words were the only option for pilots who had to call 1-800-WX-BRIEF. Visual learners could see pictures if they were on an airport that was home to a Flight Service Station. DUATS offered more words and picture options, if you had access to a computer with a modem, but the words and pictures were not real time, and pilots needed patience while waiting for the images to coalesce on the screen. Modems gave way to broadband and while weather words pretty much stuck to their time-honored schedules, pictures marched closer and closer to real time.
And now, if properly equipped, weather words and pictures are available in the cockpit. Before compiling the list of preflight weather briefing resources in the appendix of resources in AC 91-92, pilots might want to first assess their learning style, if they don’t already know.
If you enjoyed this story, why not SUBSCRIBE to JetWhine, if you haven’t already, and please share it with anyone who might find it interesting. — Scott Spangler, Editor