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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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Flyboys World War II Perry Flag Flight
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One of history’s many rewards is discovering little known stories that enrich the significance of its mass market events, such as the surrender ceremony aboard the USS Missouri (BB-63) in Tokyo Bay in September 1945. There are a number of them, including the saga of the Perry flag, awaiting the curious in Flyboys: A True Story of Courage by James Bradley, author of Flags of Our Fathers.
The book’s core is about the fate of the flyboys, naval aviators, including George H.W. Bush, who attacked the Japanese radio station on Chichi Jima. Situated between between Japan and Iwo Jima, it was the communication link that would warn of approaching flights of B-29s from islands to the south.
Looking at the photo, you’ve likely guessed that shows General Douglas MacArthur at the surrender ceremony on the Missouri. If you look closer at the framed flag in the background, you’ll count 31 stars on it. The Perry flag, Bradley explains on page 303, is the linen US flag that Commodore Mathew Perry carried ashore when he stepped ashore in Japan in 1853. (Equally interesting, the Missouri was anchored in approximately the same position as Perry’s flotilla). But that’s not the really interesting part.
Until just before the surrender, the Perry flag was on display at a museum at the U.S. Naval Academy in Annapolis, Maryland. Someone thought its display at the surrender was significant enough to entrust it to a courier, Lt. John Bremyer. Starting from Annapolis, he took off from Iwo Jima on August 29, 1945, “the last leg of a record-breaking120-hour, 9,500-mile-long trip that had taken him through 12 time zones.”
Led astray by the record-breaking aspect of his trip, I expected to find some description of a flight on par with the Truculent Turtle, the Lockheed P2v Neptune that flew nonstop from Perth, Australia, to Columbus, Ohio—11,235 miles—in September 1946. Finding no joy, I went after Lt. Bremyer. There are a number of them, and the obituary of John K. Bremyer, a lawyer who died, at age 88, on April 17, 2008 in McPherson, Kansas, where he was born on April 5, 1920, mentioned that he’d carried Perry’s flag back to Japan.
But there was no mention of a dedicated flight. Surely there must have been one because, Bradley wrote, Bremyer completed his mission when he handed the boxed flag to Admiral Halsey on the Missouri. “Then the weary lieutenant slept for two days.” The tantalizing details eluded me, and I couldn’t quit searching for them. Then I found Bremyer’s oral history at the Nimitz Education & Research Center at the National Museum of the Pacific War.
It turns out that there was no dedicated flight, which was slightly disappointing. On the other hand, I learned about a Priority One (or One Priority) World War II military travel voucher, which guaranteed a seat on the next airplane, regardless of type or what passenger got bumped, going in the right direction. When he reported to work that morning, he didn’t expect the assignment.
Bremyer was in the air that evening, headed to San Francisco. From there he took the next plane to Hawaii, then Johnston Island, Kwajalein, Guam, and then Iwo Jima. There “they were going to to put me on a destroyer, but that would take too long, so I got on a Black Cat PBY” that took him to Tokyo Bay, where a whaleboat from the Missouri collected him and Perry’s flag.
Watching the proceedings from the above the main deck, Bremyer carried the flag, as well as news releases, photographs, and motion picture film of the surrender back to Washington. “I got on a PBM [Martin Mariner seaplane] back to Guam and basically followed the same route back to San Francisco,” the 85-year-old veteran remembered.
Perry’s flag is back on display at the Naval Academy Museum, and it is No. 89 in “A History of the Navy in 100 Objects.” It gives more background on the decision-making process that sent the flag to Japan, and it mentions Lt. Bremyer’s “record-setting” trip. But like Bradley in Flyboys, it doesn’t explain what record Bremyer’s trip set or surpassed. — Scott Spangler, Editor.
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Gliders Launch with 454 Cubic Inches of Pull
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Gliders—sailplanes—are engineless flying machines powered by gravity’s conversion of altitude into airspeed. Without a doubt, they are aviation’s purest expression of flying for fun. It is also the most social aeronautical neighborhood, because glider pilots alone cannot pull their craft aloft for a flight’s initial investment of altitude.
I discovered Sky Soaring Glider Club last year, when its Cessna 150 tow plane, with its more robust powerplant, swooped low on its touchdown pass to the club’s 3,000-foot turf strip that is perpendicular to U.S. Highway 20 in Hampshire, Illinois. Imitating an owl’s cranial rotation as we passed, I saw a gaggle of waiting gliders and a covey of humans scurrying around them. With an appointment to keep, I promised that I would return.
Because they fly for fun, I figured that the club members would be making the most of a balmy, sunny Saturday. We finally had one of those last weekend. Which was why I was worried by the silence when I rolled into the gravel parking lot. Two men were readying a Schweizer 2-33, but there was no internal combustion buzz. One of the men held the two-place glider’s wing level and, without a word, it leaped forward. After a step or two, he let go.
Around the corner of hangar, sitting under an umbrella covered picnic table, the launch director listened to the glider’s pilot calling out the airspeed and altitude. The speed was a constant 60 mph. The altitude rapidly increased to 2,000 feet above the ground, when he let go of the tow rope that has pulled him aloft.
After the launch director called ATC to file a pilot report of the glider’s release altitude, he explained it’s hard to see the quarter-inch tow rope, and hitting it would not be good. Absent a tow plane, the only launch alternative was a winch, but where was it? Pointing down the runway to the east, “a mile that way.”
As I was getting my steps in for the day, a brightly stickered Honda Accord with an unusual red roof rack was slowly driving in the opposite direction, dragging two brightly colored cords, one red, one yellow. This must be the “mule” the picnic table guys were talking about. Coming to the end of the turf strip, a half-mile into the adjoining farmers field was the orange snout of the winch, with a flashing yellow light on top of its cockpit cage.
“Normally we winch from the end of the strip,” said winch driver Don Grillo, “but the farmer hasn’t been able to get his crops in because of the weather, and he let us add another 2,000 feet.” A winch’s launch ratio is roughly 3:1, so the mile-long tow rope would get the Schweizer to 2,000 feet.
With the winch at the end of the turf strip instead of out in the farmer’s field, it will pull the 2-33, with its under nose tow hook, to 1,000 feet. The higher performance PZL Krosno KR-03, Puchatek glider pulls a bit higher because the towline attached under its CG, allowing a more acute climb angle. After either glider lets go of the two rope, a ribbon drag chute prevents its freefalling tangle.
As the mule pulled the tow ropes back for the next launches, Don explained the winch the club built on the frame of a used box truck. The two-drum Tost winch is from Germany, it’s powered by a “GMC 454-cubic-inch crate engine—same as a Corvette—with the Turbo 400 transmission locked in second gear.” Next to the tachometer is an instrument panel switch labeled N and D. On the cockpit’s right sidewall is the throttle, and left and right levers either engage each towrope to the transmission or apply the brakes to its rotation.
Don is one of the club’s four winch drivers, and all three members of the launch crew, which includes the launch director and mule driver, are club certified after successful completion of the training program. “I started driving the winch last year,” said Don. “It’s exhilarating, a lot of fun, but it’s a critical job. You have to pay attention to the glider, which you can’t see at first. You have to talk to the launch director on the radio.”
Getting ready for the next launch, Don dons his David Clark headset. Even with its muffler, the 454 running at 4,500 rpm in second gear is pretty loud. He’s also listening to the launch director and the pilot, who’s calling out the glider’s airspeed. Pull too hard and you’ll overstress the glider. To prevent that, there are several stress-calibrated break links in the towline by the drag chutes.
With the winch’s singing silenced by the engine’s effort, the Krosno rises above the horizon, climbs steeply, and disappears. When it releases, the rpm jumps suddenly. Don adjusts the throttle to maintain an even strain on the drag chute. As John Abramski connects the towropes to the mule for the next launches, Don tells me that this launch set a new club record for the Krosno of 3,100 feet AGL. — Scott Spangler, Editor
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Plane Guys: Love & Respect of Aviation
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There’s no denying that general aviation is enduring an uncertain transition from its rose-colored past to a foggy future. What worked yesterday, when aviation was more widely embraced by the offspring of those alive when Lindbergh flew the Atlantic (i.e. Baby Boomers) doesn’t hold sway with their offspring and their grandchildren, for whom a growing number wonder if they even need a driver’s license. The Plane Guys Aviation at Wisconsin’s Waupaca Municipal Airport (PCZ) is finding their way by combining old and new with a realistic love and respect for aviation.
“For the love and respect of aviation” is how Plane Guys, a family business established in 2006, begins its mission statement. Straightforward and succinct, Beth Andersen said the goal is to “keep a roof over our heads and food on the table.” Beyond that, “I want people flying whether it is with my company or if I can connect with the person they need to do what they want to do, that’s the most important thing.”
Instinctively, Beth has been working to make the airport a more integrated member of the community beyond its aeronautical contributions. “When I took over in 2016, I brought EAA Chapter 444 here, and it’s been super! They do a lot of Young Eagles flights. Then there’s the Lions Club; they are holding a pancake breakfast here this Saturday. And this year we’re hosting the Humane Center [located on the other side of the airport, she said, pointing]. We’re trying to bring more events to the airport to make it a social center so nonairport users can visit it.”
Unknowingly, she was channeling Duane Cole, who in the 1990s told me that creating a social connection with the community was the key to his successful management of small Illinois airports after World War II. Plane Guys has managed the airport since 2008, and since then they have worked to “make it not a scary place, not like bigger airports” with their 10-foot-tall chain link fences and TSA agents. “When you walk in here, hey, it’s like home. We have a couple of people come in here to do their homework, adults who’ve gone back go schools and need to get away from the kids for awhile.” And just like home, Andersen wants everyone to clean up after themselves.
Originally from Racine, the Andersens established Plane Guys Aviation in 2006, when the patriarch, Pete, a longtime pilot, retired from his day job and wanted to start an aviation company. It would be at Waupaca because Pete fell in love with the airport years before, Beth said, and in 2008 the company won the contract to manage the airport when the previous manager moved on. The Andersens are not the only ones who love Waupaca; its 19 privately owned hangars and eight rental T-hangars are full.
“It’s been quite a journey,” Beth said, and there is no implication of gender or anything else in the company’s name. “We were throwing around names, and dad said, What about Plane Guys? When you meet a group of people, you ask Hey, guys, how’s it going?” So when it comes to aviation, you want to go see the Plane Guys at the Waupaca Airport.
Training sport pilots, selling light sport aircraft, and renting aircraft were all part of the plan when the Andersens started the company. “We’ve been going to EAA [AirVenture Oshkosh] since I was potty trained,” said Beth. In 2006 they went airplane shopping. “Prices for new LSAs ranged from $60,000 to more than twice that,” said Beth. By shopping at the lower end of the spectrum, “we could have affordable rental fees, less than the $150 an hour you often see at airports for tired, middle-aged airplanes.”
They started with the Allegro 2000, Beth’s winged classroom. The RANS S7 replaced it, and a Van’s Aircraft RV-12 joined it in 2015. As a dealer for both manufacturers, “our airplanes are always for sale, which some website visitors find disconcerting,” Beth said. “If a student falls in love with the airplane, we’ll happily sell it, and replace it with a newer airplane.”
Around the time the RV joined the Plane Guys family, doctors found cancer in its patriarch. He beat it in early 2016, but related complications ended his life early that year. With the diagnosis, Beth came to work at the airport full time, and took over everything after his death (“Mom is the other owner, and she does all the books”). Learning on the job, “it’s been quite a journey,” and learning about selling airplanes is on the to-do list. Until then, she connects the interested parties with the manufacturers.
Over the years, Plane Guys has been blessed with quite a few students, and most of them fly the RV-12—”We put 300 hours a year on it,” Beth said. “We have a few students learning to fly in the RANS, but most of its pilots are earning tailwheel transitions. What’s been interesting is since Basic Med went through, we do more private pilots than sport pilots. When we started it was mostly sport pilot, new people coming into aviation, not private pilots stepping down.”
The planes are equipped to train both sport and private pilots, and the two instructors, on average, serve a half-dozen students at any given time. Located on the airport, Richard Merkley is also an airframe and powerplant mechanic with inspection authorization. Dennis Carew is an instructor who lives in Appleton. “Some people call and ask if they can learn to fly in their airplane,” Beth said. “I connect them with the instructors so they can work it out directly.”
Scrolling through the Followed Dreams, which announces student achievement on the Plane Guys website, reveals a diverse population of new pilots. “Many of them are people my age,” Beth said, “mid-40s, kids out of the house, and they find new airplanes with glass cockpits, and the price is right to make the dream a reality. We also have a number of students who are college-bound high school students” with their sights set on an aviation career. And then there are the homebuilders looking for transition training and time in type to make their insurance companies happy.
Once students earn their tickets, they join the Plane Guys family of renters, and if the preflight conversation I witnessed is typical, it is another example of a mutual love and respect for aviation, and the people that give it life. — Scott Spangler