Tag Archives: Iris Louise McPhetridge Thaden

12 July 1936

Louise Thaden with the Porterfield Model 35-W. (FAI)

12 July 1936: Louise Thaden set a Fédération Aéronautique Internationale (FAI) World Record for Speed Over 100 Kilometers with an average speed of 176.35 kilometers per hour (109.58 miles per hour.)¹ She flew a Porterfield Model 35-W Flyabout over a course at Endless Caverns, near New Market, Virginia.

Less than two months later, 4 September 1936, Mrs. Thaden became he first woman to win the Bendix Trophy Race when she and her co-pilot, Blanche Noyes, flew a Beechcraft C17R “Staggerwing,” NR15835, from Floyd Bennett Field, Brooklyn, New York, to Mines Field, Los Angeles, California.

Harmon Aviatrix Trophy (NASM)

She was awarded the Harmon Aviatrix Trophy for 1936.

Iris Louise McPhetridge was born 12 November 1905 at Bentonville, Arkansas. She was the first of three daughters of Roy Fry McPhetridge, owner of a foundry, and Edna Hobbs McPhetridge. She was educated at the University of Arkansas at Fayetteville, a member of the Class of 1927. She was president of the Delta Delta Delta (ΔΔΔ) Sorority, Delta Iota (ΔΙ) Chapter, head sports for basketball and president of The Panhellenic.

Louise McPhetridge had been employed by Walter Beech as a sales representative at Wichita, Kansas, and he included flying lessons with her employment. She received her pilot’s license from the National Aeronautic Association, signed by Wilbur Wright, 16 May 1928. In 1929, she was issued Transport Pilot License number 1943 by the Department of Commerce. She was the fourth woman to receive an Airline Transport Pilot rating.

Miss McPhetridge married Mr. Herbert von Thaden at San Francisco, California, 21 July 1928. Thaden was a former military pilot and an engineer. They would have two children, William and Patricia.

Louise Thaden served as secretary of the National Aeronautic Association, and was a co-founder of The Ninety-Nines. She served as that organization’s vice president and treasurer. She set several world and national records and was awarded the national Harmon Trophy as Champion Aviatrix of the United States in 1936.

Louise Thaden stopped flying in 1938. She died at High Point, North Carolina, 9 November 1979.

Louise Thaden flew this Porterfield Model 35-W to set a World Record for Speed, 12 July 1936. (FAI)

The Porterfield Model 35-W was based on the prototype Wyandotte Pup, which had been designed by Noel Ross Hockaday. The airplane was built by students of the aviation club of Wyandotte High School, Kansas City, Kansas.

Noel Hackaday’s Wyandotte Pup, NX12546, circa 1932. The children are identified as Leland and Milton House. (Guy F. House, via Keith House)

Hockaday had previously been a designer for the American Eagle Aircraft Corporation and had designed that company’s Eaglet high-wing monoplane. Edward Everette Porterfield, Jr., the founder of American Eagle, was present when the Wyandotte Pup made its first flight. He bought the airplane and its production rights. American Eagle had gone out of business during the early years of The Depression, and a new company, Porterfield Aircraft Corporation, was formed to manufacture the airplane as the Porterfield Model 35.

The Porterfield Model 35 Flyabout was produced in several variants, and was available with LeBlond, Velle, Warner or Continental engines. It was was a single-engine, high-wing monoplane, which carried a pilot and one passenger in tandem in an enclosed cabin. The airplane had fixed landing gear with a tail skid. The fuselage was a welded tube structure, while the wing was built around two spruce spars, with spruce and plywood ribs. The airplane was covered with doped fabric. A distinctive feature of the Porterfield series are the parallel wing struts. (Most similar aircraft have their struts arranged in a “V”.)

Porterfield Model 35-70 Flyabout, NC 20700, powered by a LeBlond radial engine. (San Diego Air and Space Museum)

The Porterfield Model 35-W was 22 feet, 1 inch (6.731 meters) long, with a wingspan of 32 feet, 0 inches (9.754 meters), and height of 6 feet, 7 inches (2.007 meters). The main wheel tread was 5 feet, 6 inches (1.676 meters). Maximum payload was 501 pounds (227.25 kilograms).

A 1936 Porterfield Model 35-W, NC16401, serial number 301. (San Diego Air and Space Museum)

The Model 35-W was powered by an air-cooled, normally-aspirated, 301.458-cubic-inch-displacement (4.940 liter) Warner Aircraft Corporation Scarab Junior. This was a 5-cylinder radial engine with two valves per cylinder and a compression ratio of 5.2:1. The Scarab Junior was rated at 90 horsepower at 2,050 r.p.m. at Sea Level for takeoff (five-minute limit). The engine was 1 foot, 2 inches (0.356 meters) long, 3 feet, 0.5 inches (0.927 meters) in diameter, and weighed 237 pounds (107.5 kilograms). The engine was covered by a Townend Ring.

The 35-W had a cruise speed of 110 miles per hour (177 kilometers per hour) and maximum speed of 120 miles per hour (193 kilometers per hour). Its range was 340 miles (547 kilometers).

Porterfield Aircraft Corporation built approximately 240 Model 35s. Twenty-five of these were the Model 35-W.

Noel Ross Hockaday was born 24 May 1905 in Kinmundy, Illinois. He was the first of two children of Jake Fred Hockaday, a farmer, and Mary Kathryn Sills Hockaday. He married to Ruby I. Kelley at Los Angeles, 31 March 1937..

In addition to the Eaglet and Pup, Hockaday designed the Rearwin Airplanes Inc., Speedster, Sportster and Cloudster. (Rearwin, like Porterfield, was based at Fairfax Airport, Kansas City, Kansas.)

In 1940, Hockaday worked for the Lockheed Aircraft Corporation. Hockaday later formed Hockaday Aircraft Corporation at Burbank, California, to produce the Hockaday Comet.

Noel Ross Hockaday died at Los Angeles, California, 26 May 1959, at the age of 54 years.

Edward Everett Porterfield, Jr., circa 1925. (Airplanes and Rockets)

Edward Everett Porterfield, Jr., was born at Kansas City, Missouri, 7 November 1890. He was the son of Edward Everett Porterfield, Sr.,² a state circuit court judge, and Julia L. Chick Porterfield.

E.E. Porterfield, Jr., was a manager for the New England Equitable Life Insurance Company in Kansas City. On 17 January 1911, he married Miss Margaret Hughes in Nebraska. They would have two sons, both of whom died in infancy. Mrs. Porterfield sued for divorce, charging that she had been abandoned. The divorce was granted and she was awarded $30.00 per month in financial support.

Porterfield enlisted in the United States Army, 4 March 1918, and served as a sergeant with the 314th Trench Mortar Battery, 164th Field Artillery Brigade, 89th Division, American Expeditionary Forces. The division fought at the Battle of St. Mihiel and in the Meuse-Argonne Offensive. The 89th was inactivated following the war. Sergeant Porterfield was honorably discharged, 20 February 1919.

Porterfield’s second wife was Margaret Jellison Porterfield. They also divorced.

In 1925, Porterfield founded the Porterfield Flying School at Richards Field, the first airport for Kansas City, Missouri. In 1928, he founded the American Eagle Aircraft Corporation at Fairfax Airport, Kansas City, Kansas.³

E.E. Porterfield married his third wife, Mildred Shiveley, at Odessa, Missouri, 25 December 1930.

Porterfield later founded the Porterfield Aircraft Corporation in 1932. During World War II, light aircraft production ceased and the company eventually went out of business.

Edward Everett Porterfield, Jr., died at Kansas City, Missouri, 29 August 1948, at the age of 58 years. He was buried at the Mount Washington Cemetery, Independence, Missouri.

Porterfield Model 35-70 Flyabout. (San Diego Air and Space Museum)

¹ FAI Record File Number 12022

² Full Disclosure: Judge Edward Everett Porterfield, Sr., a Kansas state circuit court judge, had an involvement in the infamous Dr. Hyde murders which took place at the Colonel Thomas H. Swope mansion near Independence, Missouri (State of Missouri v. Bennett Clarke Hyde, 1910). Colonel Swope was a distant relative of TDiA.

³ The Kansas City Metropolitan Area is divided by the Missouri River, which is the boundary between the State of Missouri and the State of Kansas. Therefore, there is a Kansas City, Missouri, and a Kansas City, Kansas.

© 2018, Bryan R. Swopes

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4 September 1936

Louise Thaden with the Bendix Trophy. (Tom Sande, AP)

4 September 1936: Louise Thaden was the first woman to win the Bendix Trophy Race when she and her co-pilot, Blanche Noyes, flew a Beechcraft C17R “Staggerwing,” NR15835, from Floyd Bennett Field, Brooklyn, New York to Mines Field, Los Angeles, California, in 14 hours, 55 minutes, 1.0 seconds. With one fuel stop at Wichita, Kansas, Thaden and Noyes had averaged 165.35 miles per hour (266.11 kilometers per hour).

In addition to the trophy, Mrs. Thaden won a prize of $2,500.

Louis Thaden and Blanche Noyes are greeted by Vincent Bendix at Los Angeles, 4 September 1936.(National Air and Space Museum, Archives Division)
Louise McPhetridge, 1926. (The Razorback)

Iris Louise McPhetridge was born 12 November 1905 at Bentonville, Arkansas. She was the first of three daughters of Roy Fry McPhetridge, owner of a foundry, and Edna Hobbs McPhetridge. She was educated at the University of Arkansas at Fayetteville, a member of the Class of 1927. She was president of the Delta Delta Delta (ΔΔΔ) Sorority, Delta Iota (ΔΙ) Chapter, head sports for basketball and president of The Panhellenic.

Louise McPhetridge had been employed by Walter Beech as a sales representative at Wichita, Kansas, and he included flying lessons with her employment. She received her pilot’s license from the National Aeronautic Association, signed by Wilbur Wright, 16 May 1928. In 1929, she was issued Transport Pilot License number 1943 by the Department of Commerce. She was the fourth woman to receive an Airline Transport Pilot rating.

Louise Thaden’s original pilot license, No. 6850, issued by the National Aeronautic Association and signed by Orville Wright. (The Central Arkansas Library System)

Miss McPhetridge married Mr. Herbert von Thaden at San Francisco, California, 21 July 1928. Thaden was a former military pilot and an engineer. They would have two children, William and Patricia.

(Thaden had founded the Thaden Metal Aircraft Company, builder of the all-metal Thaden T-1, T-2, and T-4 Argonaut. Thaden went on to design molded plywood furniture for the Thaden-Jordan Furniture Corporation. His designs are considered to be works of art, and individual pieces sell for as much as $30,000 today.)

Iris Louise McPhetridge Thaden with her husband, Herbert von Thaden, in front of theBeech C17R Staggerwing, NR15385. (San Diego Air and Space Museum Archives)
National Harmon Trophy

Louise Thaden served as secretary of the National Aeronautic Association, and was a co-founder of The Ninety-Nines. She served as that organization’s vice president and treasurer. She set several world and national records and was awarded the national Harmon Trophy as Champion Aviatrix of the United States in 1936.

Louise Thaden stopped flying in 1938. She died at High Point, North Carolina, 9 November 1979.

The Beechcraft Staggerwing got its name because its lower wing was placed ahead of the upper wing (negative stagger). This improved the pilot’s visibility. It was a fast airplane for its time and set several speed and altitude records.

Louise Thaden in the cockpit of Beechcraft C-17R NR15385 at the start of the Bendix Air Race. (San Diego Air and Space Museum Archives)
Louise Thaden in the cockpit of Beechcraft C17R NR15835 at the start of the Bendix Air Race. (San Diego Air and Space Museum Archives)

The Beechcraft C17R was single-engine biplane operated by one pilot and could carry up to three passengers in its enclosed cabin. The basic structure was a welded tubular steel frame with wood formers and stringers. The wings and tail surfaces were built of wood spars and ribs. The airplane was covered with doped fabric, except the cabin and engine, which were covered in sheet metal. It was equipped with retractable landing gear.

The Beech 17 was  26 feet, 10 inches (8.179 meters) long with a wingspan of 32 feet, 0 inches (9.75 meters) and overall height of 8 feet, 0 inches (2.438 meters). It had an empty weight of 2,540 pounds (1,152.1 kilograms) and gross weight of 4,250 pounds (1,927.8 kilograms).

This photograph of Beechcraft Model 17s under construction at Wichita, Kansas, reveals the structure of the airplane. (Beech Aircraft Corporation)

The Staggerwing was offered with a selection of engines of different displacements and horsepower ratings. The C17R was powered by an air-cooled, supercharged, 971.930-cubic-inch-displacement (15.927 liter) Wright Whirlwind 440 (R-975E3) 9-cylinder direct-drive radial engine with a compression ratio of 6.3:1. The R-975E3 was rated at 420 horsepower at 2,200 r.p.m., and 440 horsepower at 2,250 r.p.m. for takeoff, burning 92-octane gasoline. The engine was 43.00 inches (1.092 meters) long and 45.25 inches (1.149 meters) in diameter. It weighed 700 pounds (318 kilograms).

This engine gave the C17R Staggerwing a cruise speed of 185 miles per hour (298 kilometers per hour) and maximum speed of 211 miles per hour (340 kilometers per hour). The service ceiling was 25,000 feet (7,620 meters) and its range was 800 miles (1,287.5 kilometers).

Beechcraft C17R NC15835 at the finish of the Bendix Trophy Race, Mines Field, Los Angeles, 4 September 1936. (National Air and Space Museum, Archives Division)

The Beechcraft C17R flown by Louise Thaden to win the Bendix Trophy, serial number 77, had already been sold, but Walter Beech let Thaden use it for the race before delivering to the owner. It was painted in Sherwin Williams blue with white stripes. The rear passenger seats were removed and a 56 gallon (212 liter) auxiliary fuel tank installed in their place.

After the race, the owner took his airplane to South America. Several Staggerwings have been registered as N15835, including s/n 74 and s/n 81. The status of the Bendix winner is unknown.

© 2017, Bryan R. Swopes

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