Mail Delivery By Rockets

The history of the postal system is inextricably tied to the history of transport. Advances in transportation technology have not only allowed people to travel farther and explore more territory, it also allowed the postal system to expand their influence over a larger area. As new inventions and discoveries shortened the time of travel, messages and letters began to reach distant recipients in lesser time, and the postal system became more efficient. By the time the first trans-pacific airmail was delivered, the postal service had tried every mode of transport available to man, including rockets.

The cover of a rocket mail delivered in the state of Sikkim, India, on 28 September, 1935. Photo credit: regencystamps.com

The earliest type of missile mail was one which you’ve probably seen in historical movies where a parchment is wrapped around the shaft of an arrow and shot through the air into a castle or enemy territory. A more modern version of the idea was presented to an astonished audience by a German poet and dramatist, Heinrich von Kleist, through a newspaper article in 1810. At that time rocketry was still in its infancy. Rockets of that age were gunpowder powered and were primarily used as artillery in battlefields. Kleist amused himself by calculating that a rocket could deliver a letter from Berlin to Breslau, a distance of 180 miles, in half a day or one-tenth of the time required by a horse mounted carrier.

Kleist’s theory was put into practice on the small Polynesian island of Tonga, halfway around the world, by a British inventor, Sir William Congreve, using rockets he designed. But the rockets were so unreliable that the idea of using them in mail delivery was summarily dismissed, and no further thought was put into it until nearly a century later, when Hermann Julius Oberth, a German physicist and engineer and one of the founding fathers of rocketry, revisited the topic in 1927.

Hermann Oberth (center, in profile) demonstrates his tiny liquid-fuel rocket engine in Berlin in 1930. Photo credit: National Air and Space Museum, Smithsonian Institution

In June 1928, Professor Oberth delivered a convincing lecture on the occasion of the annual meeting of the Scientific Society of Aeronautics in Danzig, where he proposed the development of small rockets with automatic guidance that could carry urgent mail over distances of 600 to 1,200 miles. Professor Oberth’s lecture generated a great deal of interest throughout the world, and even the American ambassador to Germany took note. But it was a young Austrian engineer that became a pioneer in this field.

Living in the Austrian Alps, the young engineer Friedrich Schmiedl was well aware of the fact that mail delivery was extremely painful between mountain villages. What could be an eight hour walk between two villages could be only two miles apart as the rocket flies. Friedrich Schmiedl was already experimenting with solid-fuel rockets, and in 1928 undertook experiments with stratospheric balloons. After several unsuccessful attempts, Schmiedl launched the first rocket mail in 1931 and delivered 102 letters to a place five kilometers away. The rocket was remotely controlled and landed using a parachute. His second rocket delivered 333 letters.

A graphic from a 1954 science magazine showing the trajectory of Schmiedl’s rocket mails. On the right is a page from an Austrian magazine from the 1930s talking about Friedrich Schmiedl's rocket postal service.

Schmiedl’s rocket mails inspired several other countries such as Germany, England, the Netherlands, USA, India and Australia to conduct similar experiments with varying degree of success. In 1934, in an attempt to demonstrate to the British the viability of his rocket delivery system, a German businessman named Gerhard Zucker loaded a rocket with 4,800 pieces of mail and launched it from an island in Scotland. Government officials watched as the rocket soared into the sky and exploded, scattering scorched letters all over the beach like confetti. After his failed demonstration, Zucker was deported back to Germany where he was immediately arrested on suspicion of espionage or collaboration with Britain.

Experiments on rocket mail were largely successful in India, where a pioneering aerospace engineer named Stephen Smith perfected the techniques of delivering mail by rocket. Between 1934 and 1944, Smith made 270 launches, at least 80 of which contained mail. Smith created history when he delivered by rocket the first food package containing rice, grains, spices and locally-made cigarettes to the earthquake wracked region of Quetta, now in Pakistan, across a river. Later, Smith tied a cock and a hen together to one of his rockets and launched the frightened birds across another river. Both birds survived the trip and were donated to a private zoo in Calcutta after their ordeal. His next parcel contained a snake and an apple.

Despite his quirky nature and questionable choice of payload, Stephen Smith was wholeheartedly supported by the Maharaja of Sikkim, a British Protectorate in the eastern Himalayas, where he carried most of his rocket experiments.

A 1934 Indian Rocket Mail. Photo credit: www.stampcircuit.com

Another Indian Rocket Mail from 1934. Photo credit: www.stampcircuit.com

Things didn’t really took off in the US until 1959, when the Post Office Department fired a Regulus cruise missile with its nuclear warhead replaced by two mail containers, towards a Naval Station in Mayport, Florida. The 13,000-pound missile lifted off with 3,000 letters and twenty-two minutes later struck the target at Mayport, 700 miles away. The letters were retrieved, stamped and circulated as usual.

All 3,000 letters were copies of the same written by the Postmaster General. Each crew member of the submarine that launched the missile received a copy of the letter, so did President Eisenhower and other US leaders as well as postmasters from around the world.

“The great progress being made in guided missilery will be utilized in every practical way in the delivery of the United States mail,” the letter read. “You can be certain that the Post Office Department will continue to cooperate with the Defense Department to achieve this objective.”

The successful delivery of the mails prompted Postmaster Summerfield to enthusiastically declare that “before man reaches the moon, mail will be delivered within hours from New York to California, to Britain, to India or Australia by guided missiles.”

But it was not to be. The cost of rocket mail was too high—that little experiment with the Regulus cruise missile cost the US government $1 million, but generated only $240 in revenue by sale of postage stamps. Neither the Post Office nor the Department of Defense could justify the cost of using missile mail, especially when airplanes were already making mail deliveries across the world in a single night at the fraction of a cost.

And that was the end of the program. No further attempts to deliver mail by rockets have been made since then.

One of the mail containers used to carry letters aboard the Regulus missile. 

The firing of the Regulus I missile from USS Barbero, June 8, 1959.