-
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.
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…)
-
Skywriting: Who Says a Flying Job Can’t be Fun?
by
[sc name=”post_comments” ][/sc]
I walked out in the alley on Saturday near my home just north of Chicago and was surprised to see a bunch of kids all staring up at the azure-blue sky to the north. “Hey guys. What’s going on?” I asked. One small boy said nothing and only pointed up to the sky. That’s when I was treated to an aerial display I hadn’t seen in at least 20 years … a skywriter.
When I was a kid – yes, long before the 20 years so no smart aleck remarks – skywriting was a part of the integrated mix of marketing messages a company used to blast its message to thousands of people in a moment. I towed banners from a 7KCAB Citabria many years ago, but skywriting looks like way more fun than I ever had dragging rags.
-
Where is the Best Aviation Blog?
by
[sc name=”post_comments” ][/sc]
As much as stay awake at night wondering how many people around the globe are clicking through the stories here at Jetwhine, I know we are only one small fish in the sea of people who think they know just about everything when it comes to air travel.
So as a public service – and because the curiosity is simply keeping me awake at night – I hope you’ll tell us here at Jetwhine what other aviation blogs you read and why. They might be about air travel, or ATC, or airline flying or learning to fly. Your choice.
Why Bother?
Seriously, blogging is all about sharing the conversation with others. If you check out our blogroll here on the right, you’ll find some of the blogs I read.
What about you? Let’s gather them up and I’ll post a final list before the blogger-fest at AirVenture next month.
Technorati tags: Blogging, AirVenture 2008, pilot, airline, air travel, flight training, light sport aircraft, air traffic control -
Backyard Flying: Fun & Cheap
by
[sc name=”post_comments” ][/sc]
Would you be interested in a ready-to-fly single seater, complete with engine for $12,000 to $15,000? How about a two-seater with a BRS ballistic chute for $25,000 to $30,000. Yeah, me too!
Dicks Starks is a long-time friend, and I always stop what I’m doing when his messages appear in my in box because they always bear interesting tidbits, and his goofy good nature always makes me smile.
If that name sounds familiar, maybe you’ve seen his articles in magazines like EAA Sport Pilot or Kitplanes. Or you’ve read his book, You Want to Build and Fly a What?, which chronicles his start in flying and how he and some friends built Volkswagen-powered Nieuports and formed the Kansas City Dawn Patrol.
Dick wrote recently to say his new book, Fokkers at Six O’clock, which picks up where the first book left off, was at the printer and that he hoped to make Author’s Corner at EAA AirVenture. And he sent some photos of his wife’s new plane, a Morane parasol designed by Robert Baslee of Airdrome Aeroplanes, the same guy who built four full-scale Nieuport 17s for the movie Fly Boys.
Then he recounted his trip to Valley Engineering/Culver Props in Rolla, Missouri. The father and son team of Gene and Larry Smith make engines, reduction drives, and props. Their Big Twin, a four-cycle 38-hp V-twin powers the Morane, and they also make fuel-sipping VW-based engines that Dick raves about.