Tag: AIAA Profiles Earl H. Dowell

AIAA Member Spotlight – March 2016

AIAA Profiles Earl H. Dowell

By Duane Hyland, AIAA Communications (2008–2017)
11 March 2016

Crouch will receive the 2016 AIAA Distinguished Service Award this June at the AIAA Aerospace Spotlight Awards Gala. The award celebrates his “inspirational leadership and ceaseless efforts in promoting the public understanding of the history of AIAA and the compelling aerospace achievements of its members.”

Crouch has a long record of service to AIAA. A former vice chair of the Institute’s History Technical Committee, he has done much to preserve both the history of AIAA and the history of aerospace. He is the author of Rocketeers and Gentlemen Engineers: A History of the American Institute of Aeronautics and Astronautics…and What Came Before. Published in 2006, the work covers the history of the Institute, its predecessor organizations, and the role that AIAA has played in the aerospace community. Additionally, Crouch also advised the AIAA Historic Aerospace Sites Committee and in 2011 helped designate the 1861 site of T. S. Lowe’s balloon demonstration flight as a historic aerospace site. Crouch is currently helping lead the selection committees for the Gardner-Lasser Aerospace History Literature Award, the History Manuscript Award, and the Children’s Literature Award. Crouch is an AIAA Distinguished Lecturer and presents several lectures on aerospace history each year.

Before he wrote the history of AIAA, Crouch authored The Bishop’s Boys, considered by most historians to be the definitive work on the Wright Brothers.

Crouch’s previous honors include the 2005 AIAA Gardner-Lasser Aerospace History Literature Award, and the 1977 AIAA History Manuscript Award. Among Crouch’s numerous other awards are the 2012 Paul S. Kerr History Prize; the 2003 William F. Shea Award for Distinguished Contributions to Aviation; The Smithsonian Distinguished Research Award for 2002; Aviation Trail Foundations’ 2001 Trailblazer of the Year Award and the 1989 Christopher Prize for distinguished contributions to literature affirming the highest values of the human spirit.

When I asked Crouch what attracted him to preserving the history of flight and aerospace and if there were any influential people who steered him in that direction, he replied, “Growing up at Wright-Patterson Air Force Base, the son of a father involved in engineering testing for the United States Air Force, it was hard not to be fascinated by flight. In my case, it was an interest in the history of aerospace engineering. Who figured out how to fly in the first place? How did we move from Kitty Hawk to the moon? I spent a lot of summer days riding my bike to the Air Force Museum.” He continued, “I thought that Royal Frey, who ran the research division of the museum had a pretty neat job. Over half a century later, I still think that working at an aerospace museum is a pretty satisfying way to make a living.”

Crouch’s best career memory stems from his involvement with the Centennial of Flight Commission. He noted: “President George W. Bush appointed me Chair of the Advisory Board to the Centennial of Flight Commission. It was a chance to work with some aerospace leaders to plan the commemoration of the invention of the airplane. For a historian who had spent a career researching and writing about the Wright brothers, it was a great experience.”

Because the National Air and Space Museum is the nation’s most visited museum, it is obvious that flight and its history resonates with the public. That realization led me to ask Crouch why preserving our nation’s aerospace history is so critical. He replied, “When people of the distant future look back on the 20th century, I am pretty sure they will remember it as a time when human beings traveled from the sands of Kitty Hawk to the moon in just over 66 years. It is a story of stunning achievement that is surely worth understanding in detail, preserving, and sharing.”

When asked what he would tell high school students who were thinking about pursuing a history degree to work in the field of historical preservation, Crouch offered this advice: “Follow your passion. Discover something that absolutely fascinates you, and pursue it.” He pointed back to his childhood as an example of how the past was prologue for his future, along with his budding entrepreneurial spirit: “I was ten years old when I opened my first museum – a display of my fossil collection on our back porch. A nickel admitted a neighborhood kid to see my trilobites, brachiopods, and crinoids, and listen to my talk on the ancient creatures of Ohio’s Miami Valley.” He concluded, “I’m still at it today, planning exhibits on the past that I hope will inspire others to share my passion for the events and the people who laid the foundation for the future.”

Since so much of history goes undocumented, I asked Crouch what he felt the aerospace community could do to be better stewards of our collective history. He believes that individuals should take steps to preserve and donate papers and other materials, noting: “Our modern aerospace enterprise creates tons of records, so much material that a historian can be overwhelmed. Often, the most useful records of a project or program are the personal papers of the professionals involved. So on behalf of my future colleagues, I would ask engineers and scientists to consider preserving and donating their papers to an archive of their choice.”

Because so many students aren’t fascinated by history class, I asked Crouch how teachers could engage them. Crouch feels that teachers need to move beyond having students memorize dates and facts, stating that “There is a big difference between asking students to memorize names and dates and involving them in the historical process. Encouraging kids to interview older members of their family about events, large and small, that had an impact on their lives can help build an appreciation for the past and an understanding of the role of past events in shaping the present and the future.”

Recognizing the role Crouch plays in preserving AIAA’s history, as well as the history of the aerospace community, we closed the interview by discussing AIAA’s stewardship of aerospace history. Crouch commented: “The founders of the Institute of the Aeronautical Sciences patterned their organization on the Royal Aeronautical Society, envisioning an Institute that would function as a professional society and an organization that would preserve the history and culture of flight. The IAS building in New York brimmed from basement to penthouse with collections of aeronautical memorabilia. The Institute even had a membership category for historians, and produced a publication on the history of flight.” However, times changed and, “over time, the IAS sharpened its focus on the more traditional concerns of a professional technical society.”

I asked Crouch what happened to the IAS’ collection of artifacts and he responded, “The historical treasures that the early IAS gathered found their way to the National Air and Space Museum and the Library of Congress. The shift away from historical collection is natural and understandable, but AIAA would be well served by appreciating the historical interests of its sections and individual members.” When asked why that mattered, Crouch concluded, “The study of the past plays an important role in shaping the technology of the future.”

AIAA congratulates Tom Crouch for his selection as the March 2016 Spotlight subject, and for winning this year’s AIAA Distinguished Service Award. We thank him for his valuable work in preserving and interpreting our community’s past and wish him the best on his future endeavors.

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AIAA Member Spotlight – April 2016

AIAA Profiles Earl H. Dowell

By Duane Hyland, AIAA Communications (2008–2017)
15 April 2016

Using its short stint in Washington, DC, to recharge its batteries, this month the Spotlight felt it was up to some short travel and pointed its beam south of DC to fall on Durham, North Carolina, and the campus of Duke University, illuminating Earl H. Dowell, an AIAA Honorary Fellow, and William Holland Hall professor in the university’s Mechanical Engineering department.

Dowell is this year’s winner of the AIAA Reed Aeronautics Award. He will receive the award on 15 June during the AIAA Aerospace Spotlight Awards Gala at the Ronald Reagan Building and International Trade Center in Washington, DC The award honors Dowell’s “pioneering contributions to aeroelasticity, structural dynamics, and unsteady aerodynamics, which has an enormous influence on aerospace technology.”

Dowell’s work has focused on several areas of aerospace, including studying panel flutter – or how aircraft panels behave at speed; the problem of limit cycle behavior in various military aircraft at transonic speeds; and the performance of helicopter blades. All of his work has created a wide body of literature used by researchers across the aerospace community. Among his critical contributions were recognizing the nonlinear nature of panel flutter; improving computational fluid mechanics models, as well as computational structural dynamics models; and creating a substantial body of literature for researchers to draw on in the field of Reduced Order Modeling (ROM). Dowell was among the first to recognize the important role of geometric nonlinearities on the aeroelastic stability of helicopter rotor blades. He and his colleague, Dewey Hodges, developed basic equations describing rotor blade behavior that researchers use in the analysis of hingeless rotor blades in hover and forward flight. He is the editor and co-author of “A Modern Course in Aeroelasticity,” considered to be the leading text in the field.

Dowell’s numerous honors include the 2008 Guggenheim Medal; 2007 Walter J. and Angeline H. Crichlow Trust Prize; the 2007 American Society of Mechanical Engineers (ASME) Spirit of St. Louis Medal; the 2002 AIAA von Kármán Lectureship in Astronautics; and the 1980 AIAA Structures, Structural Dynamics and Materials Award. Dowell is an elected member of the National Academy of Engineering and an ASME Fellow.

When I asked Professor Dowell what his inspiration was to pursue aerospace as a career, he noted that his inspiration came from his childhood, stating: “Growing up in a small town of less than 2,000 inhabitants in Illinois, I fantasized from about the age of ten as to where an airplane could take me,” and, illustrating that the dreams of youth are often resilient, he concluded, “and I am still enjoying that fantasy, which has often turned to reality.”

Dowell had a long list of mentors and points of inspiration for his career, noting that it his Uncle Bill, a pilot and Air Force veteran, who first inspired him. Other mentors included “Harry Hilton, a professor at the University of Illinois who is still active as he is about to celebrate his 90th birthday”; AIAA Fellow John Dugundji, Dowell’s doctoral adviser at MIT; “along with committee members – Holt Ashley, Marten Landahl, and Herb Voss.” Dowell also pointed out that Voss was his first boss at The Boeing Company, and he cited Jon Turner, Voss’ boss as another influence. He also mentioned that “Court Perkins, our Department Chair at Princeton and later President of the National Academy of Engineering, was also a powerful and much appreciated mentor,” and added, “When I came to Duke it was Terry Sanford then our President, and former governor, and future senator.”

When asked what his favorite career memory was to this point, Dowell replied, “There are far too many to name, but being in charge of a major wind tunnel test program at the advanced age of 23 with much more experienced engineers on the team was a memorable experience. Some of those fellows were over 40!” He continued, remembering his “first faculty position at Princeton was exciting as I was the most junior member of an otherwise, all-star cast.” He continued, “joining Duke as the Dean of Engineering was a major challenge that worked out well.” He reflecting that “looking back on all these experiences I am not sure why I was brave or foolish enough to take them on.”

When it came to advice for students who are seeking a career in aerospace, Dowell reached back to his childhood and shared some things his mom taught him: “The very best career advice I have ever received was from my mom. She told me ‘always try to work with people who are a step ahead of you.’” Dowell noted his mom also “really did not think it would be all that hard for me to find them.”

For young professionals just starting out in aerospace, Dowell advised: “As a parent, I discovered that when it comes to advice, often less is more. All three of our children have been personally and professionally successful even though the oldest received much more advice than the youngest. It is hard to see the difference in their subsequent success. When it comes to offering advice and mentoring, timing is critical. You look for the learning moment.”

When I asked Professor Dowell what he felt the value of AIAA was to engineers and scientists, he responded, “AIAA and I have been together since my student days and the opportunity to learn from our heroes and peers has been exciting and very rewarding.” He shared this memory: “I still remember seeing Theodore von Kármán at an AIAA meeting – at that time it was IAS – and having the courage to say hello and his gracious reply.”

We closed our talk by discussing the future of aerospace, specifically what great advances in aerospace technology and/or science are on the horizon? Dowell replied, “In my own field of aeroelasticity substantial progress has been made in understanding – and exploiting on occasion – nonlinear phenomena.” Dowell continued, “Panel flutter was an early success, but freeplay induced flutter and limit cycle oscillations and even unsteady separated flows (buffet) are beginning to be modeled with some fidelity. The holy grail in my opinion is a rational nonlinear dynamics model of turbulence and I hope to be active long enough to see us well along that path,” humorously concluding “but I may have to stay healthy for several more years.”

AIAA congratulates Earl Dowell for his selection as the April 2016 Spotlight subject, and for winning this year’s AIAA Reed Aeronautics Award.

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