The rigid airship Graf Zeppelin, LZ 127, under the command of Dr. Hugo Eckener, departed Lakehurst Naval Air Station, New Jersey, 8 August 1929, heading east across the Atlantic Ocean on the first aerial circumnavigation by air. The flight was sponsored by publisher William Randolph Hearst, who had placed several correspondents aboard.
Graf Zeppelin was named after Ferdinand Adolf Heinrich August Graf von Zeppelin, a German general and count, the founder of the Zeppelin Airship Company. The airship was constructed of a lightweight metal structure covered by a fabric envelope. It was 776 feet (236.6 meters) long. Contained inside were 12 hydrogen-filled buoyancy tanks, fuel tanks, work spaces and crew quarters.
A gondola mounted underneath contained the flight deck, a sitting and dining room and ten passenger cabins. The LZ-127 was manned by a 36 person crew and could carry 24 passengers.
LZ-127was powered by five water-cooled, fuel injected 33.251 liter (2,029.1 cubic inches) Maybach VL-2 60° V-12 engines producing 570 horsepower at 1,600 r.p.m., each. Fuel was either gasoline or blau gas, a gaseous fuel similar to propane. The zeppelin’s maximum speed was 80 miles per hour (128 kilometers per hour).
After refueling at the Kasumigaura Naval Air Station, Tokyo, Japan, Graf Zeppelin started east across the Pacific Ocean on 23 August, enroute to Los Angeles, California. This leg crossed 5,998 miles (9,653 kilometers) in 79 hours, 3 minutes. This was the first ever non-stop flight across the Pacific Ocean.
LZ 127 arrived at Mines Field (now, LAX) at 1:50 a.m., 26 August 1929. There were an estimated 50,000 spectators.
16 August 1927: Not long after Charles A. Lindbergh had flown solo across the Atlantic Ocean, James D. Dole, founder of the Hawaiian Pineapple Company (HAPCO, now the Dole Foods Company, Inc., Westlake Village, California) offered a prize of $25,000 to the first pilots to fly from Oakland Field, Oakland, California, to Wheeler Field, Honolulu, Oahu, Territory of Hawaii. A $10,000 prize was offered for a second-place finisher.
There were 33 entrants and 14 were selected for starting positions. After accidents and inspections by the race committee, finalists were down to eight.
Accidents began to claim the lives of entrants before the race even began. A Pacific Aircraft Company J-30 (also known as the Tremaine Hummingbird) flown by Lieutenants George D. Covell and Richard S. Waggener, U.S. Navy, named The Spirit of John Rodgers, crashed into the cliffs of Point Loma in heavy fog 15 minutes after takeoff from North Island Naval Air Station, San Diego, California, enroute to Oakland Field. Both naval officers were killed. They had drawn starting position 13. Arthur V. Rogers was killed after takeoff from Montebello, California, in his Bryant Monoplane, Angel of Los Angeles. One airplane, Miss Doran, made an emergency landing in a farm field, and a fourth, Pride of Los Angeles, crashed into San Francisco Bay while on approach to Oakland. The occupants of those two airplanes were unhurt.
By the morning of 16 August, there were eight entrants. There starting positions had been selected by a random draw. A little before 11:00 a.m., the first airplane, a Travel Air 5000, registered NX911 and named Oklahoma, took off but soon aborted the flight because of engine trouble. El Encanto, a Goddard Special, NX5074, crashed on takeoff. A Breese-Wilde Monoplane, Pabco Flyer, NX646, crashed on takeoff. The crews of these three airplanes were not hurt.
The next airplane to take off was Golden Eagle, the prototype Lockheed Vega. Registered NX913, it was flown by Jack Frost with Gordon Scott as the navigator. It soon disappeared to the west.
The Lockheed was followed by the Buhl CA-5 Air Sedan, NX2915, named Miss Doran. Repairs from its unscheduled landing in the farmer’s field had been accomplished. It was flown by John “Auggy” Pedlar with Lieutenant Vilas R. Knope, U.S. Navy, as navigator. Also aboard was a passenger, Miss Mildred Doran, the airplane’s namesake. She was a 23-year-old fifth-grade school teacher from Flint, Michigan, who knew William Malloska, owner of the Lincoln Petroleum Company (later, CITGO) and convinced him to enter an airplane in the Dole Air Race and allow her to fly along. Two local air circus pilots reportedly flipped a coin for the chance to fly the airplane. Auggy Pedlar won the toss. Just ten minutes after takeoff from Oakland Field, Miss Doran returned with engine problems.
Next off was Dallas Spirit, a Swallow Special, NX941, with William P. Erwin, pilot and Alvin H. Eichwaldt, navigator. It also quickly returned to Oakland.
The last two entrants, a Breese-Wilde 5 Monoplane, NX914, Aloha, with Martin Jensen, pilot, and Paul Schluter, navigator, and Woolaroc, a Travel Air 5000 took off without difficulty.
Miss Doran made a second attempt and took off successfully. Pabco Flyer also tried again, crashing a second time.
Woolaroc, with Arthur C. Goebel as pilot and William J. Davis, Jr., as navigator, flew across the Pacific and arrived at Honolulu after 26 hours, 17 minutes, to win the race. Aloha arrived after 28 hours, 16 minutes.
Golden Eagle and Miss Doran never arrived. A search by more than forty ships of the United States Navy was unsuccessful. Dallas Spirit was repaired and Erwin and Eichwaldt took off to join the search for their competitors. They, too, were never seen again.
29 July 1938: At 12:08 p.m., local time, the Pan American Airways flying boat Hawaii Clipper lifted off from the waters of Apra Harbor on the west side of Guam, an island in the western Pacific Ocean. The Clipper was on a planned 12½ hour flight to Manila in the Philippine Islands. On board were a crew of nine, with six passengers.
Hawaii Clipper never arrived at its destination. What happened to it and the fifteen persons on board remains one of the enduring mysteries of aviation history.
The flight was designated Trip #229. It had originated at Alameda, on San Francisco Bay, California, and flew to Honolulu in the Hawaiian Islands, then on to Midway Island, Wake Island, and Guam.
The Pan Am crew consisted of Captain Leo Terletzky, First Officer Mark A. Walker, Second Officer George M. Davis, Third Officer Jose M. Sauceda, Fourth Officer John W. Jewett, Engineer Officer Howard l. Cox, Assistant Engineer Officer T.B. Tatum, and Radio Officer William McGarty. The passengers were attended by Flight Steward Ivan Parker.
Captain Terletzky held a Transport Pilot’s License issued by the Aeronautics Branch of the United States Department of Commerce. He had flown more that 9,200 hours, and 1,614 hours in the Martin M-130.
Captain Terletzky (there are alternate spellings, such as Terletsky, and he was also known as Leo Terlitz) was born 18 January 1894 at Odessa, Imperial Russia (now, Ukraine).
Following the Russian Revolution, he left his native country and traveled to Omsk, Siberia, and then to Yokohama, Japan, where he embarked on S.S. Empress of Japan, on 28 March 1919. The passenger liner arrived at Vancouver, British Columbia, Canada, 6 April. He then traveled on to Seattle, Washington, via the Canadian Pacific Railroad, arriving there on 9 April 1919.
Terletzky became a naturalized citizen of the United States, 15 December 1924. On 1 July 1919, he married Miss Helen Sarepta Bowman at Miami Beach, Florida.
The airliner’s six passengers were: Lieutenant Commander Edward E. Wyman, United States Naval Reserve, of Bronxville, New York. Commander Wyman was the former assistant to Juan Trippe, the founder of Pan American Airways. He was now employed by Curtiss-Wright. Pan American’s traffic manager, Kenneth A. Kennedy, was also on board. Colonel Earl E. McKinley, M.D., United States Army Reserve, Dean of Medicine at George Washington University in Washington, D.C., a bacteriologist, and Fred C. Meier, Ph.D., were collecting airborne bacteriological samples to research transocean bacterial transfer. Major Howard C. French, Air Corps, United States Army (Reserve), the commanding officer of the 321st Observer Squadron based at Vancouver, Washington. Finally, there was Choy Wah Sun (also known as “Watson Choy”), of New Jersey. Mr. Choy was believed to be transporting $3,000,000 in U.S. Gold Certificates for the Kuomintang, the Nationalist Party of China, which was headed by Chiang Kai-shek.
Hawaii Clipper was a Martin M-130, NC14714. It was the first of three of the type built for Pan American Airways. With the experimental registration NX14714, it had made its first flight at Middle River, Maryland, 30 December 1934.
When Hawaii Clipper departed Alameda, it had flown 4,751:55 hours, TTAF. When it made its last position report, it had flown another 55 hours, 58 minutes.
The Martin M-130 was a large, four-engine flying boat of all-metal construction, designed to carry as many as 36 passengers on transoceanic flights. The M-130 was 90 feet, 10.5 inches (27.699 meters) long with a wingspan of 130 feet, 0 inches (39.624 meters). It was 24 feet, 7 inches (7.493 meters) high. The flying boat had a maximum takeoff weight of 52,252 pounds (23,701 kilograms).
The M-130 was powered by four air-cooled, supercharged Pratt & Whitney Twin Wasp S2A5-G two-row 14-cylinder radial engines with a compression ratio of 6.5:1. The S2A5-G had a Normal Power rating of 830 horsepower at 2,400 r.p.m. to 3,600 feet (1,097 meters), and 950 horsepower at 2,550 r.p.m. for takeoff, using 87-octane gasoline. The engines drove three-bladed Hamilton Standard Hydromatic constant-speed propellers through a 3:2 gear reduction. The S2A5-G was 4 feet, 8.75 inches (1.442 meters) long, 3 feet, 11.88 inches (1.216 meters) in diameter, and weighed 1,235 pounds (560 kilograms).
The airplane had a maximum speed of 180 miles per hour (290 kilometers per hour), and a cruise speed of 130 miles per hour (209 kilometers per hour). The service ceiling was 10,000 feet (3,048 meters). Its range was 3,200 miles (5,150 kilometers).
Hawaii Clipper departed its mooring at Apra Harbor at 11:39 a.m., local time (3:39 a.m., Manila time) and lifted off 29 minutes later. In addition to its six passengers, the airliner was carrying 1,138 pounds (516 kilograms) of cargo. The duration of the flight was estimated as 12 hours, 30 minutes. The M-130 carried sufficient fuel for 17 hours, 30 minutes of flight. Its gross weight was 49,894 pounds (22,632 kilograms) at takeoff, well under its maximum takeoff weight.
At 04:11 Greenwich Civil Time (12:11 p.m., local time), Radio Officer McGarty sent Hawaii Clipper‘s coded 04:00 Ded Reckoning ² position report. The deciphered message read:
“Flying in rough air at 9,100 feet. Temperature 13 ˚C., wind 19 knots from 247˚ Position N. 12˚27, E 130˚40, ground speed made good, 112 knots, desired track 282˚. Rain. During past hour conditions varied. 10/10ths sky above covered by strato cumulus clouds, base 9,200 feet. Clouds below 10/10ths sky covered by cumulus clouds whose tops were 9,200 feet. 5/10ths of the hour on instruments. Last DF bearing from Manila 101˚”
This placed the Clipper approximately 582 nautical miles (670 kilometers) east southeast of Manila. The transmission was acknowledged. When the land-based radio operator tried to make contact one minute later to provide updated weather information, he received no reply. There were no further radio transmissions received.
When Hawaii Clipper did not arrive at Manila, a large ocean search was begun. On 30 July, the Unites States Army transport ship USAT Meigs discovered an oil slick approximately 28 nautical miles (52 kilometers) south southeast of the flying boat’s last reported position. The slick was described as being approximately 1,500 feet (457 meters) in circumference.
No physical evidence of the Martin M-130 has ever been found. What happened to cause its disappearance is unknown.
While it is assumed that the airplane went down at sea, that might not have been the case.
A telephone company employee on Lahuy Island (a small island of the coast of Luzon, east southeast of Manila) reported having heard a large airplane above clouds at 3 p.m. Manila Time. In 1938, the number of large airplanes operating in the Philippine Islands must have been fairly limited.
As with the disappearance of Amelia Earhart and Fred Noonan the previous year, there was no shortage of “conspiracy theories.” An example is that agents of the Empire of Japan had stowed away aboard Hawaii Clipper, hijacked the airplane and it was flown to Ulithi, and then Truk. The story goes on the the passengers and crew were murdered and their bodies were buried under the foundation of a hospital under construction.
Another story is that the Clipper was intercepted by a Japanese flying boat, such as the Kawanishi H6K Type 97 Large Flying Boat, which forced it to an unknown destination, similar to the story above.
Only six months earlier, another Pan American flying boat, Samoan Clipper, a Sikorsky S-42B, NC16734, disappeared about two hours out of Pago Pago. The airliner is believed to have exploded in midair. In that case, an oil slick and wreckage were found.
¹ Following the United States’ entry into World War II, Captain Terletzky’s widow, Mrs. Sarepta B. Terletzky, (née Helen Sarepta Bowman), a graduate of Smith College, joined the United States Navy. She was commissioned as a Lieutenant, W-VS, United States Naval Reserve, 4 August 1942. On 1 December 1945, she was promoted to the rank of lieutenant commander, and to commander, 1 January 1950. Mrs. Terletzky had been born at New York City, New York, 28 September 1895. She died at Miami, Florida, 4 August 1970.
² Ded Reckoning (Deductive Reckoning, often erroneously referred to as “dead reckoning,” is a method of navigation which uses a previously known position, time of flight, estimated speed of the aircraft based on forecast weather conditions, etc., to estimate the current geographical position. It is the standard method of navigation in the absence of radio aids or satellite position.
2 July 1937: At approximately 10:00 a.m., local time, Amelia Earhart and Fred Noonan departed Lae, Territory of New Guinea, aboard their Lockheed Electra 10E Special, NR16020, enroute to Howland Island, 2,556 miles (4,113.5 kilometers) east-northeast across the South Pacific Ocean. The airplane was loaded with 1,100 gallons (4,164 liters) of gasoline, sufficient for 24 to 27 hours of flight.
28 June 1927: At 7:09 a.m., PDT, 1st Lieutenant Lester J. Maitland and 1st Lieutenant Albert F. Hegenberger, Air Service, United States Army, took off from Oakland Municipal Airport, California, aboard an Atlantic-Fokker C-2, serial number A.S. 26-202, Bird of Paradise. Their destination was Wheeler Field, Honolulu, Territory of Hawaii, 2,407 miles (3,874 kilometers) across the Pacific Ocean.
The Air Service had been planning such a flight for many years. Specialized air navigation equipment had been developed, much of it by Lieutenant Hegenberger, and simulations and practice flights had been carried out.
Bird of Paradise was built by the Atlantic Aircraft Co., the American subsidiary of Fokker. Derived from the civil Fokker F.VIIa/3m, a three-engine high-wing passenger transport with fixed landing gear, it had been adopted by the Air Service as a military transport. A.S. 26-202 was modified with a larger wing, increased fuel capacity, and the installation of Hegenberger’s navigation equipment.
It was powered by three 787.26-cubic-inch-displacement (12.901 liter) air-cooled Wright Aeronautical Corporation Model J-5C Whirlwind nine-cylinder radial engines with a compression ratio of 5.1:1. The J-5C was rated at 200 horsepower at 1,800 r.p.m., and 220 horsepower at 2,000 r.p.m. They turned two-bladed Standard adjustable-pitch propellers through direct drive. The Wright J-5C was 2 feet, 10 inches (0.864 meters) long and 3 feet, 9 inches (1.143 meters) in diameter. It weighed 508 pounds (230.4 kilograms).
The C-2 was fueled with 1,134 gallons ( 4,293 liters) of gasoline and 40 gallons (151 liters) of oil.
Maitland and Hegenberger planned to fly a Great Circle route to Hawaii and to use radio beacons in California and Hawaii to guide them, in addition to celestial navigation. For most of the flight, however, they were not able to receive the radio signals and relied on ded reckoning.
After 25 hours, 50 minutes of flight, Bird of Paradise landed at Wheeler Field, 6:29 a.m., local time, 29 June 1927. It had completed the first Transpacific Flight.
For their achievement, both officers were awarded the Distinguished Flying Cross.