Part 5

In the early twenties, with transcontinental mail service well under way, there were many attempts made to establish air transport and cargo services. Most of these ventures were undertaken by former military aviators, using cast-off Army airplanes. Their airports usually were cow pastures. They planned their own air routes and got their weather reports from the newspapers. Bad weather would often ground a flight and passengers were almost as uncertain as the weather. Many of those pioneer operators had to depend on the dollar-a-ride hops of Sunday sightseers to “keep the wolf from the door.” One service operated 14-passenger converted Navy seaplanes on a route between New York and Havana, and another route between Cleveland and Detroit. Most of these pioneer air transport Operations lasted for only a short time, due to the heavy cost of maintaining the planes and the lack of properly marked air routes.

Difficulties had arisen in the air mail service by 1921. It had become apparent that air mail would not be valuable to the Government unless it could be flown by night as well as by day. It had been standard practice for the mail to be flown only during daylight hours and to be carried by train at night. The Government was about to abandon the air mail service when the pilots pointed out that all that was needed was a chain of airway beacons and lights for the landing fields and planes.

To prove their point a group of pilots volunteered to make a continuous night-and-day flight from San Francisco to New York. Flying in relays and guided at night by bonfires tended by friendly farmers along the route, the pilots flew the mail across the country in 33 hours and 21 minutes. The Post Office Department immediately arranged for the installation of lighted airways and the planes were equipped with navigation and landing lights.

By July, 1924, a continuous chain of lighted airway beacons marked the air mail route from coast to coast. Lighted landing fields were established at 250-mile intervals and through transcontinental air mail service, with night-and-day flying, was an accomplished fact.

AMERICA’S FIRST ALL-METAL TRANSPORT

We have spoken of the fact that in the early twenties aircraft designers were hesitant about attempting to overcome the prejudice of aviators against the internally braced monoplane design. However, there was one young man who had never been timid about the idea. He was a tall, scholarly fellow who, as a youngster, was designing and flying model planes before the Wright Brothers made their first flight. Like the Wrights he was the son of a minister. This young man, William Bushnell Stout by name, worked his way through the University of Minnesota by firing a furnace. After graduation he worked for a newspaper and edited a boys’ page, one of the first in America that gave complete directions for building model airplanes.

With the outbreak of World War I, Bill Stout became technical adviser to the Aircraft Board in Washington. His first advice to the aviation experts there was to scrap all existing designs and build a streamlined monoplane with an internally braced wing without struts or wires. They said it could not be done. Bill promptly sat down and drew workable plans for such a ship.

Eventually the Government bought Bill Stout’s design and with the money he set up his own engineering laboratory in Detroit, Michigan. He decided that wood and fabric were not suitable to stand the strain required in a modern plane. His first all-metal plane, a Navy torpedo bomber, flew successfully in test flights, but a Navy pilot wrecked it on its official trial. The Navy would not order another one, so Bill had to raise more money. He got it and built America’s first all-metal transport plane. It carried eight passengers in addition to the two-man crew. Bill knew it was a good plane and he was satisfied with it, but he did not want to be a manufacturer. He wanted instead to stay at his engineering work, so he sold his airplane company to Henry Ford, and the famous Stout-designed, Ford tri-motor, “Tin Goose” was born.

Just about the time the Ford tri-motors were proving themselves in tests an important law was passed by Congress. It was the Kelly Air Commerce Act of 1925. It authorized the Post Office Department to contract with private firms to fly the air mail routes maintained by the Department of Commerce. This law was designed to encourage private capital to enter the aviation field, with the objective of carrying not only mail but passengers. In February, 1926, officials of one of the newly formed air transport firms proudly watched their first big air transport plane take off from the Detroit airport. The big plane was a Stout-designed, all-metal Ford, the first of a series of airliners that were destined to make aviation history.

By the end of 1926, there were sixteen air transport operators holding air mail contracts. Most of the flying was still done in single-engined planes. Up to that time the weight of the big water-cooled engines in multi-engined transports left little to spare for pay loads. It was not until the development of the radial engine that commercial aviation really started.

The in-line engine required a long, heavy crankshaft with sections for each cylinder. This required that separate crankshaft bearings be used for each cylinder. The whole crankshaft assembly was heavy and cumbersome. When extra cylinders were added, the engine’s weight increased and it became longer. In the radial engine a single crankshaft hearing was used.

The radial air-cooled engine immediately showed many advantages over the in-line, water-cooled engines of that time. The use of aluminum in its construction made it lighter. It was cooled by allowing air to rush through finely spaced fins on cylinder heads and barrels. The weight of the cooling liquid (water) and the pump and mechanism to circulate it was avoided.

BETTER POWER FOR AMERICA’S AIRPLANES

The Wright Brothers’ first airplane engine had weighed 170 pounds and had produced 12 horsepower. It had used twenty-five per cent of its energy propelling itself. With the introduction of the air-cooled, radial engine twenty years later, a pound and a half of engine had been made to produce one horsepower. Thus the new 350-pound radial engine of 200 horsepower put all but a fraction of weight into load-carrying power.

While we are discussing horsepower, it might be well to find out just what we mean by the term. In connection with steam and gasoline engines it is used for the reason that the horse had for years been man’s most common power plant. One horsepower represents the power ascribed to a heavy dray horse in the days of horse-drawn vehicles. This “standard” one-horse’s-power includes the three factors, time, weight, and distance, or the length of time it takes to move a certain weight a certain distance. One horsepower in these factors amounts to the ability to lift 33,000 pounds one foot in one minute. Actual brake tests, where an experimental engine shows its ability to lift a certain number of pounds so high in one minute, gives the engineer a series of tables to be used in designing other engines. Each cylinder produces an equal share of the engine’s total horsepower. Thus each cylinder of the nine-cylinder, 200-horsepower, Wright radial engine produced slightly over 22 horsepower, or eight more than the entire four cylinders of the Wright Brothers’ 1903 engine.

With the introduction of the first practical, light-weight, air-cooled, radial engine, American aviation underwent a great change for the better.

The Lawrance-designed Wright J engines promptly began to put a long succession of famous fliers and famous airplanes in the books for one record after another. The Stout-designed Ford tri-motor transport plane was powered with Wright J3 radials. The J3 was adapted for use by the United States Navy and led the Navy to discontinue entirely its use of liquid-cooled power plants in favor of air-cooled radial engines for all its service airplanes. Wright J4 engines powered the flight of Admiral Richard E. Byrd and Floyd Bennett over the North Pole in 1926. Tony Fokker, who had designed Germany’s fighters in World War I, began to make records with his American-built planes powered with Wright radials.

With the arrival of a suitable engine, fliers all over the country began to think of the Raymond Orteig prize of $25,000 for the first nonstop flight from New York to Paris. This offer had been standing since 1919. Admiral Byrd was ready to try for it when a slim, quiet, young air mail pilot hopped off from Long Island, N. Y. Flying a Ryan monoplane powered with a Wright J5 radial, this young fellow flew the Atlantic nonstop to land, some thirty-three hours and thirty-nine minutes later, in Paris with the quiet announcement, “I am Charles Lindbergh.”

RECORD-MAKING FOKKER TRI-MOTOR TRANSPORT PLANE

The best fighter planes used by the Germans in World War I were not of German design. They were designed and built under the supervision of a young man from Holland. Tony Fokker had offered his airplane designs to his native Holland. They were refused. In turn, Fokker tried to interest the British, French, and Belgians in his airplanes, but none of them took him seriously. Just before World War I, the Germans “tied up” Fokker with a contract that kept him practically their prisoner until the war was over.

After the Armistice, Fokker fled from Germany with much of his equipment and established himself in an airplane factory in his homeland. The United States bought some of his airplanes, and in 1923 he established an aircraft factory in this country.

In April of the same year, two Army lieutenants, Oakley Kelly and John Macready, flying a Fokker T-2 powered by a _Liberty_ engine, set a world’s endurance record by remaining in the air for thirty-six hours. Later, in the same Fokker, they flew nonstop from Long Island to California at a speed of nearly one hundred miles an hour. In 1925, Fokker began building his famous Fokker tri-motor transport plane.

Among the first private firms that were successful in winning an air mail contract was the Colonial Air Transport, operating between New York and Boston. This airline was started in 1925 by a young ex-Navy flyer named Juan Trippe, descendant of an old New England whaling family. Young Trippe’s airline used a small fleet of Tony Fokker’s tri-motor transport planes. In December, 1925, Juan Trippe, Tony Fokker, Harry Bruno, and George Pond, the pilot, climbed into one of the Fokker tri-motors on what Trippe called a survey flight. The “survey” included some flying around the Florida coast and climaxed with a record nonstop flight from Miami, to Havana, Cuba.

The idea behind Juan Trippe’s “survey” flight to Florida and Havana was to extend Colonial Air Transport’s route from Boston to Florida, then on southward. His board of directors could not see his point, so Trippe left Colonial. In a matter of weeks he had rounded up a few ex-war flier friends with money, and had organized his own airline under the title, Pan American Airways. Before it was completely set up Trippe had a contract to fly the mail from Key West, Florida, to Havana, Cuba. That was in 1928. From that time on, Juan Trippe’s Pan American Airways continued to move just as fast as it had in its first few weeks of organization. Less than two years after the first Key West-Havana flight, Pan American was flying the mail to the Argentine.

AIR TRANSPORT GROWS

While Tony Fokker was producing his famous tri-motor transports for budding airlines like Juan Trippe’s Pan American Airways, Admiral Byrd and three companions had flown a tri-motored Fokker to France. Clarence Chamberlain and Charles Levine flew a Bellanca radial-powered monoplane to Germany; Army Lieutenants Maitland and Hegenberger flew 2,400 miles nonstop from Oakland, California, to Honolulu, Hawaii, in a radial-powered Fokker; Amelia Earhart and Wilmer Stultz flew a Fokker from Newfoundland to England. Amelia thus became the first woman to cross the Atlantic in an airplane. Later she was to fly the Atlantic alone.

Tony Fokker’s tri-motors and Wright radial engines predominated in the famous flights of the late twenties, but other American planes and engines were coming into prominence. The first Wright 200-horsepower radial engine was called the _Whirlwind_. It was soon followed by a more powerful Wright radial, the 400-horsepower _Cyclone_. At the same time the Pratt & Whitney organization of Hartford, Connecticut, made the 425-horsepower air-cooled _Wasp_ radial engine. Wright _Cyclones_ and Pratt & Whitney _Wasps_ were destined to power American airplanes for many years to come.

During 1927 and 1928 the map of the United States showed a continually increasing number of lines marked “Air Mail Route.” In 1926, the sixteen companies holding air mail contracts flew about 1,700,000 air miles. Much of this mileage was flown in single-engined, open-cockpit airplanes. Mail was the principal source of revenue. The few passengers who first braved the rigors of early air transport either rode on mail sacks or in small, cramped cockpits. Pilots and Operation men alike frankly admitted they were not keen about carrying passengers.

The Boeing Aircraft Company of Seattle, Washington, set up the Boeing Air Transport and took over the operation of the air mail service from Chicago to San Francisco. National Air Transport handled the Chicago-New York route, to complete the transcontinental route. Jack Frye and others established an air mail and transport service between Los Angeles, California, and Phoenix, Arizona. Western Air Express operated between Los Angeles and Salt Lake City, Utah. A number of short lines operating routes from the Great Lakes and down through the south were soon to be merged to create American Airlines.

In 1928, an air traveler making an extensive trip would be likely to fly in seven or eight different types of planes. He might step into a Fokker tri-motor, change to a single-engined Boeing, ride for some distance in a Ford tri-motor or a Whirlwind-powered _Travel Air_, and finish his trip in a Curtiss _Carrier Pigeon_. The planes usually flew low, at between one and two thousand feet. Here the air was usually rough and a good percentage of air travelers were troubled with airsickness. The planes landed every few hundred miles to refuel. They were noisy and heated only by exhaust gases from the engines, which usually furnished more sickly fumes than heat. Little food, if any, was served, and a coast-to-coast journey took thirty-three hours.

Though 1926 was the official start of American air transport, the first two years of its existence were years of experimentation. It was not until the country’s imagination had been fired by the flights of Lindbergh, Byrd, Chamberlain, and others that air transport emerged from its experimental stage. By 1927 the bigger minds in airline services had realized that the time was coming when provisions must be made to carry passengers on a large scale. It was not until 1928, with the arrival of powerful radial engines and better airplane designs, that air transport began to show real prospects. It was two years after the first beginnings of air transport that John Monk Saunders, the author, paid over $400 for an air passage from Los Angeles to New York, and became the first transcontinental air passenger.

Although its aircraft production had been mainly for the Army and Navy, the Boeing Aircraft Company also was in the air transport business through its Chicago-San Francisco air mail route. Boeing’s inventive genius was turned to air transport problems and created, first, the Boeing 40-B4 four-passenger and mail plane. Then came the big twelve-passenger, radial-powered, tri-motor plane, called the “Pioneer Pullman of the Air.” This ship, Boeing 80-A, helped to reduce the coast-to-coast transport time to twenty-seven hours. When the 80-A was introduced the Boeing Air Transport and the National Air Transport had been merged to form United Air Lines, the first transcontinental airline.

With air transport five years old, by 1930 the speed of planes was only about 100 miles per hour. Engineers and transport men agreed that the air transport plane must be faster. The planes of that day still had a considerable amount of external bracing and many of them were biplanes with strut and wire wing bracings. This caused the drag that was holding down the speed of the transport. Many of these planes had so many bracings that they whistled as they flew. To make a profit, the air transport operators had to have faster, quieter, and yet more comfortable airplanes. They must also be more easily maintained.

In 1921, Boeing came up with a plane that, while not the final answer to the air transport problem, was to point the way to the modern all-metal, monoplane type of air transports. This plane was the Boeing _Monomail_. The _Monomail_ was big, fast, and comfortable, and it carried a big pay load. It was the first practical low-wing, all-metal transport to be put into service in this country. It carried five passengers, their baggage, and 1,750 pounds of mail or cargo, at a cruising speed of 140 miles per hour. The _Monomail_ was the sensation of air transport in 1931, and set the pace for future transport planes.

DONALD DOUGLAS’ DREAM COMES TRUE

The Boeing people, though pleased with the reception and performance of the _Monomail_, knew that the single-engine plane was not the final answer. If the engine failed, the plane must land. If the plane was over rough or mountainous country, forced landings meant danger. A big plane must have two engines, one of which could keep the plane flying if the other failed. Boeing went to work with this in mind.

Near Los Angeles, the young man who had been dreaming of big commercial transport planes since the Wright Brothers’ trials at Fort Meyer, also was thinking of two-engined transports that could fly on one engine. From the time Donald Douglas’ _World Cruisers_ had circled the globe, his aircraft had grown larger and larger. His orders, however, were for Army, Navy, and Coast Guard planes; not for great commercial airliners.

Although Donald Douglas had achieved a great deal of international fame as the result of the round-the-world flight and was highly respected in military circles, few other people knew him. A quiet, industrious young man, he had put all his earnings back into his business and had continued to work on his dream of big, roomy, smooth-flying airliners. He visualized air transport flying from coast to coast and from country to country in a great network of airlines that would link the whole world.

On a hot, dry day in the summer of 1933, in Winslow, Arizona, a new two-engined transport took off from one of the highest airports on the Transcontinental & Western Airways route. Gaining altitude, the pilot cut off one of its two engines, then flew more than 200 miles over the Rockies to Albuquerque, New Mexico. Returning, the pilot cut off one engine on the take-off. With one _Cyclone_ radial roaring, the transport took off easily and climbed steadily. The first Douglas DC-1 transport had proved itself and a dream had come true.