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This information comes from the biographical file for pilot Hegenberger, CH-281000-01 et seq., reviewed by me in the archives of the National Air & Space Museum, Washington, DC.

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Your copy of the "Davis-Monthan Airfield Register" with all the pilots' signatures and helpful cross-references to pilots and their aircraft is available at the link. Or use this FORM to order a copy signed by the author. ISBN 978-0-9843074-0-1.

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"Winners' Viewpoints: The Great 1927 Trans-Pacific Dole Race" is available at the link. Use this FORM to order a copy signed by the author. What was it like to fly from Oakland to Honolulu in a single-engine plane during August 1927? Was the 25,000 dollar prize worth it? Did the resulting fame balance the risk? For the first time ever, this book presents the pilot and navigator's stories written by them within days of their record-setting adventure. Pilot Art Goebel and navigator William V. Davis, Jr. take us with them on the Woolaroc, their orange and blue Travel Air monoplane (NX869) as they enter the hazardous world of Golden Age trans-oceanic air racing. ISBN 978-0-9843074-3-2.

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Miller, John M. "Flying Stories: A Chronicle of Aviation History from Jennys to Jets by the Pilot Who Flew Through It All". It was published by The American Bonanza Society in 2002, and is available from them at www.bonanza.org . Follow their Marketplace link.

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Another Register pilot, William C. Ocker, is credited with experimenting with some of the key flight instruments used for blind flight. Curiously, even though both pilots worked contemporaneously, I found no connections made between Hegenberger's and Ocker's work.

Yet another, Clarence Culver, was involved even earlier with radio voice communications between aircraft and the ground.

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ALBERT F. HEGENBERGER

THE VERY FIRST SOLO BLIND FLIGHT

Albert F. Hegenberger was born September 30, 1895 and died in Florida on August 31, 1983. He graduated from MIT with a degree in aeronautical engineering. He was well-equipped for his stellar career in aviation.

He signed into the Davis-Monthan Register as a passenger on June 20, 1927. He was flying with Lester Maitland and they were on their way to San Francisco to begin a flight that would take them across the Pacific Ocean to Hawaii. They would be the first pilots to do so. Please follow this link to view a short motion picture clip of Hegenberger and Maitland with their airplane on the ground at Tucson.

Their airplane was an Army Fokker C-2 trimotor transport, 26-202, specially outfitted, strengthened and equipped for the flight. They wrote "Honolulu or bust" in the remarks column of the Register. Click here to see an image of Hegenberger and Maitland on this site when they stopped at Tucson. This image most certainly was taken near the time of filming the motion picture above. They did make it to Wheeler Field, Oahu on June 29, 1927 in 25 hours and 43 minutes. Hegenberger and Maitland received the Distinguished Flying Cross for their flight. Below, courtesy of site visitor Roger Holden, Hegenberger sits at the radio table in 26-202. Note the wet cell battery and the light-weight wicker chair.

Albert Hegenberger at the Radio Table in Fokker 26-202, Date & Location Unknown (Source: Holden)
Albert Hegenberger at the Radio Table in Fokker 26-202, Date & Location Unknown (Source: Holden)

Below, a succinctly tabulated artifact from the trans-Pacific flight, found in the NASM dossier cited in the left sidebar. It is their flight log, with timing and positional information, hand-written by Hegenberger. Imagine today, in the age of the satellite-based Global Positioning System, traversing 2,400 miles of open ocean based on your "most probable fix". If you are a navigation buff, you'll enjoy this raw, Golden Age treasure.

Flight Log for the Trans-Pacific Flight
Trans-Pacific Log

Hegenberger and Maitland were the first ones successfully to fly all the way across the Pacific (a Navy team in flying boats made the attempt in 1925, landed in the water 450 miles short of Hawaii, and sailed the rest of the way). They were soon followed by two civilian teams. First, Ernest L. Smith and Emory Bronte flew a Travel Air across on July 14, 1927.

The link states that Maitland and Hegenberger had returned from Hawaii before Smith and Bronte departed, and that, "... when Smith signaled his readiness to take off that July 14 morning. Maitland and Hegenberger had come to the field and wished their former rivals luck." Below, we see Hegenberger on the left with Smith, probably during those good luck wishes. Although the photo is dated July 20th, the caption says, "Lieut. Albert Hegenberger, who accompanied Lieut. Maitland, conquerors of the Pacific, walking with Ernest L. Smith just before the takeoff."

Albert Hegenberger (L) and Ernest L. Smith, July 20, 1927 (Source: Underwood)
Albert Hegenberger and Ernest L. Smith, July 20, 1927

This moment in time, in photograph and caption, is shared with us by friend of dmairfield.org, John Underwood.

Caption, Albert Hegenberger and Ernest L. Smith, July 20, 1927 (Source: Underwood)
Caption, Albert Hegenberger and Ernest L. Smith, July 20, 1927 (Source: Underwood)

Second, on August 17, 1927, the team of Register pilot Art Goebel and William V. Davis, Jr. participated in and won the trans-Pacific Dole Race. Their flight is detailed in the book written by your Webmaster, "Winners' Viewpoints..." cited in the left sidebar. They and the second place airplane flown by Martin Jensen and Paul Schluter, were the only people to fly the Pacific during the 1920s. The next attempt was made during January 1935, when, successfully, it was made by Register pilot Amelia Earhart flying solo from west to east from Honolulu to San Francisco. It is significant that three of the four successful Pacific flights of the 1920s were flown by Register pilots.

Now back to Hegenberger. He is one of the many examples of Davis-Monthan pilots who made significant contributions to the science and practice of military aviation, with its attendant spinoffs to civil flying. His trans-Pacific flight is a key contribution, well-documented on the Web, and generally considered the highlight of his career. In a minor sense, he coined a word that us used today to describe the intimate connection between navigation and aviating. The word is "avigation." The following from the Bureau of Aeronautics Newsletter of November 30, 1927 reports.

Bureau of Aeronautics Newsletter, November 30, 1927 (Source: Webmaster)
Bureau of Aeronautics Newsletter, November 30, 1927 (Source: Webmaster)

However, less appreciated but more impactful to this day, on May 9, 1932 Hegenberger piloted the very first official solo blind instrument flight. The key words here are 'official' and 'solo'. Let me explain. Earlier, in 1926 Howard Stark developed his "1-2-3 System" of blind flying by reference to the turn coordinator (see page 9 of the Miller reference in the left sidebar). According to Miller, Stark flew many unofficial, straight and level blind flights over the Connecticut hills carrying mail between New York and Boston. His primary instrument to give him horizontal reference was his turn coordinator. Even though the enroute sections of the flights were performed blind, the takeoffs and landings were in visual conditions.

Likewise, in September 1929 Jimmy Doolittle flew an airplane from the ground, around a planned course, and returned it successfully to a landing by reference to instruments alone (it was a fair-weather day and he was under a canvas hood and could not see out of the cockpit). But, he had a check pilot with him in the other cockpit who could see. Doolittle flew on a clear day and was not solo.

Hegenberger, however, withstood the hammer test by making his 'official' 1932 flight 'solo.' The flight was documented in Popular Aviation, March, 1934 (PDF 1.9Mb) at the link. Note that the article suggests that Hegenberger also flew under a hood over the cockpit, but he was solo. If you are an instrument-rated pilot and read this article, you will be amused at how little changed over the years regarding the mechanism of the instrument approach. Use of Global Positioning System satellites has changed everything now, but the principles still apply.

Hegenberger's feat is further documented simply and tersely on a page from his pilot log, preserved in his dossier at the National Air & Space Museum. This (image below) is how it was noted:

May 9, 1932 First Solo Instrument Flight Logged
Hegenberger Pilot Log

The key wordings on this image are difficult to read, but his star indicates the date of the first solo instrument flight. The starred and circled footnote, barely readable on the original, says: "One of the [nine] flights on 9 May 1932 was the solo flight. First ever."

Take another good look at this image, ladies and gentlemen. It documents and represents a profound turning point in aerial science and practice. Before the star, all flight was dependent upon good visibility. After the star, we ventured alone into clouds with impunity. And so it was, recorded tersely in the flight log of a modest pilot.

Lest you think the Army didn't recognize the importance, below is a page and a half spread dedicated to Hegenberger's flight that appeared in the popular Air Corps Newsletter of May 28, 1932. I spliced the pages together using PhotoShop. If you'd like a hard copy of the article to study, it's at the link (PDF, 2Mb).

Air Corps Newsletter, May 28, 1932 (Source: Web)
Air Corps Newsletter, May 28, 1932 (Source: Web)

To be sure, this event was not an overnight accomplishment. Hegenberger began his efforts to understand the needs, requirements and technologies of military instrument flying back in 1918. Through years of incremental experimentation and refinement he brought the system to an operational point in 1933 where it was installed at four Army flying fields. Two classes of flying officers were trained on its use (under the order and support of B.D. Foulois, then Chief of the Air Corps). The officers received it enthusiastically.

Collier Trophy Award, Popular Aviation, November, 1935 (Source: PA)

 

Although the development of the system took over a decade, its deployment was very rapid after its value, robustness and safety were proven. The second of the two classes of instrument-trained officers was deployed to the four Army fields to act as instructors for other pilots. Register pilot Robert Henderson was one of the instructors responsible for rolling out the training.

By September 1934 the military was inviting, via an intense public relations program through the Department of Commerce (see Register pilot Gilbert Budwig to understand the DOC's early interest in this program), civilian air lines to send selected groups, including operations and technical personnel as well as pilots, to Patterson Field in Dayton, OH to participate in individual demonstrations of the system. It was rolled out rapidly to airways and airfields that formed the early network of commercial air transport across the country.

A Blind Landing Award
The Collier Trophy has been awarded
to Capt. Albert F. Hegenberger, for his
work in perfecting blind-landing and
blind-flying systems based on the use
of the Fairchild-Kruesi "radio compass."

In 1934 Hegenberger received the oak leaf cluster to his Distinguished Flying Cross, and won the Collier Trophy for his work with instrument flying. The article, above, left, from Popular Aviation (PA) magazine, November, 1935 documents the award of the Trophy by president Roosevelt.The brief "filler" article, right, appeared in the August 8, 1935 issue of the British journal Flight (p. 152).

Hegenberger was the second of seven Davis-Monthan Register pilots and passengers to receive the Collier trophy between 1921 and 1955, a brilliant testimony to the competence of the people who signed our Registers so long ago.

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UPDATE OF 03/16/10 I read of an interesting passage in an oral history given by Register pilot Clarence M. Young in July, 1971. This passage gives evidence that another pilot, besides Howard Stark and Doolittle, flew under instrument conditions. Although the exact date is not clear from the transcript, it was probably near 1932. Does anyone KNOW?

In his transcript, Young stated that several Federal agencies,

COL . YOUNG: "... cooperated on the development of blind flying . It was demonstrated by one of our pilots, the late Jim Kinney. I went along as emergency pilot . He flew from Washington to Newark "under the hood", following a radio beam system that had been worked out, and landed at Newark Airport without having seen a thing.

MR . HENLE [the interviewer]: That early? Remarkable : What a brave young fellow he was.

COL. YOUNG: It was not so much bravery as it was skill, and the radio equipment that had been developed.

MR. HENLE: This was a pilot in the 1930s, during Mr. Hoover's Presidency, flying blind and seeing nothing -- seeing nothing except his instrument?

COL. YOUNG: Yes; otherwise I would not have been there as check pilot. On arrival at the airport there were two reporters, one from the New York Times and one from the New York Tribune. They knew we were coming in, and, being true reporters, they had to see it to believe it. So we invited each of them to take a quick trip as emergency pilot . They did and they were convinced of the efficacy of the instrument that first made "blind flying" possible. It has had some improvements through the years, but the principle is still the same.

MR. HENLE: That is a fascinating facet of this story. You were faced here with doing things that would increase public confidence in aviation.

COL . YOUNG: Yes. That was a primary objective all the way through . We realized that flying had to be demonstrated to be safe -- that there had to be rules, regulations, limitations, etc . By the time President Hoover left office in March 1933, the groundwork had been done in the way of lights, communications, instrument flying, with many men from all departments and bureaus contributing their time and energy to lay the foundation of what is now our airways system.

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Dossier 2.2.102

THIS PAGE UPLOADED: 01/14/07 REVISED: 04/02/07,11/19/08, 01/24/09, 03/06/10, 03/16/10, 02/01/11, 12/05/12, 06/30/14, 09/12/14

 
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OTHER BOOKS FOR YOU

"Military Aircraft of the Davis Monthan Register, 1925-1936" is available at the link. This book describes and illustrates with black & white photographs the majority of military aircraft that landed at the Davis-Monthan Airfield between 1925 and 1936. The book includes biographies of some of the pilots who flew the aircraft to Tucson as well as extensive listings of all the pilots and airplanes. Use this FORM to order a copy signed by the author. ISBN 978-0-9843074-2-5.

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http://www.cafepress.com/content/global/img/spacer.gifThe Congress of Ghosts is an anniversary celebration for 2010.  It is an historical biography, that celebrates the 5th year online of www.dmairfield.org and the 10th year of effort on a project dedicated to analyze and exhibit the history embodied in the Register of the Davis-Monthan Airfield, Tucson, AZ. This book includes over thirty people, aircraft and events that swirled through Tucson between 1925 and 1936. It includes across 277 pages previously unpublished photographs and texts, and facsimiles of personal letters, diaries and military orders. Order your copy at the link, or use this FORM to order a copy signed by the author.  ISBN 978-0-9843074-4-9.

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