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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.
Max Trescott photo 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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New Mexico Admits Existence of Alien Spacecraft
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A friend in DC just e-mailed this update to the Jetwhine news room.
From the wastelands of New Mexico comes the news – no, Eclipse is fine, for now.
This is certain to become THE news story of 2007, from the same state that brought you presidential candidate Bill Richardson.
New Mexico has finally gone public with documentation that proves the existence of the spacecraft we all knew the government been hiding since the 40s. Jetwhine staffers have been unable to reach the candidate in Iowa for his perspective on the crisis.
Gaze now my friends upon the evidence attached here … a copy of a recently published navigational chart of the Roswell area printed by the State of New Mexico – proof positive that we have been visited by aliens and the folks in New Mexico have known all along (Note prominent spacecraft footprint on the chart).
This evidence does not confirm that the White House has any knowledge of the invasion of course. Press secretary Dana Perrino, in fact, reportedly did not recall any briefing about flying saucers since it would have occurred before she was born. The White House does not believe the saucers could be any more difficult to work around than UAVs. (more…)
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Southwest Airlines … Thank You
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As Friday’s Jetwhine posts proves yet again, I simply love to tweak the nose of practically every airline in the U.S. They just give us so bloggers so much ammunition.
I can’t seem to help myself.
It’s always been tough to say anything ugly about Southwest though. OK, maybe the dress code thing last summer came pretty close.
After Friday’s announcement that Southwest would fly home 171 soldiers for the holidays – free of charge – there’s not much you can say except thanks to Colleen Barrett and the thousands of other people who operate an airline with something no other carrier seems to think is important … a conscience … a soul … a feeling that the people they carry are just that, people … not stuff.
Here’s the gist of the Southwest News Release …
Southwest Airlines will fly 171 Texas Army National Guard soldiers from North Carolina to Texas on Sunday, Dec. 23. The 436th Chemical Company of the Texas Army National Guard is stationed at Fort Bragg, North Carolina, waiting for deployment to Afghanistan. They recently got news that their deployment has been delayed, so now they are able to spend the holidays with their families, and Southwest Airlines is making it possible! The soldiers will arrive in Austin, Dallas, and San Antonio on Sunday courtesy of Southwest. Southwest Airlines Employees and Customers will be alongside their families to welcome home the soldiers!
Thanks folks!
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The Night Before Christmas … Aviation Style
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Sunday, December 23, 2007
The Night Before Christmas
‘Twas the night before Christmas, and out on the ramp,
Not an airplane was stirring, not even a Champ.
The aircraft were fastened to tiedowns with care,
In hopes that come morning, they all would be there.The fuel trucks were nestled, all snug in their spots,
With gusts from two-forty at 39 knots.
I slumped at the fuel desk, now finally caught up,
And settled down comfortably, resting my butt.When the radio lit up with noise and with chatter,
I turned up the scanner to see what was the matter.
A voice clearly heard over static and snow,
Called for clearance to land at the airport below.He barked his transmission so lively and quick,
I’d have sworn that the call sign he used was “St. Nick”.
I ran to the panel to turn up the lights,
The better to welcome this magical flight. (more…)