Explorer II 1935 Stratsophere Flight Balloon; Largest Balloon Ever Built

This is a piece of the Fabric used in Explorer II. This flight was sponsored by National Geographic Society (NGS) and U.S. Army Air Corps. Format is approximately 6.25 inches by 3.25 inches. It has printing on both sides. One side has an illustration of Explorer II ascending over text that reads EXPLORER II 1935 stratosphere Flight Balloon Capt. Albert W. Stevens Flight Commander Capt. Orval A. Anderson U. S. Army Air Corps. Take-off from Black Hills of South Dakota. The other side states This is a Piece of the Fabric Used in EXPLORER II 1935 Stratsophere Flight Balloon Largest Balloon Ever Built sponsored by National Geographic Society and U.S. Army Air Corps courtesy of Goodyear Tire & Rubber Company. The balloon used for the Explorer II expedition was cut up into strips and distributed as commemorative bookmarks among the NGS members who supported the mission. It is common for one or both sides of the bookmark to be discolored as the result of the chemical reaction between sunlight and the rubber coating on the cotton fabric used to construct the balloon. The Goodyear Tire & Rubber Company was founded in 1898 by Frank Seiberling and based in Akron, Ohio. The company was named after American Charles Goodyear, inventor of vulcanized rubber. The Goodyear tires became popular because they were easily detachable and required little maintenance. Goodyear had been manufacturing airships and balloons since the early 1900s. NOTE: THIS IS DIFFERENT FROM THE NGS ISSUED BOOKMARK!!! This is more of a souvenir than a bookmark in form and format. Explorer II was a manned U.S. high-altitude balloon that was launched on November 11, 1935, and reached a record altitude of 72,395 ft. Launched at 8:00 am from the Stratobowl in South Dakota, the helium balloon carried a two-man crew consisting of U. S. Army Air Corps Captains Albert W. Stevens and Orvil A. Anderson inside a sealed, spherical cabin. The crew landed safely near White Lake, South Dakota, at 4:13 pm and both were acclaimed as national heroes. Scientific instruments carried on the gondola returned useful information about the stratosphere. The mission was funded by the membership of the National Geographic Society. In January 1934, the National Geographic Society (NGS) and the U. S. Army Air Corps decided to collaborate on a program to build and launch a manned balloon to the then record altitude of 15 mi. This vehicle would be capable of carrying a crew of three in an airtight capsule, along with a laboratory of instruments. The hydrogen balloon, named Explorer, was completed by July at a cost of around $60,000. The balloon was launched from a canyon in the Black Hills of South Dakota on July 28, 1934 and reached a near-record altitude of 60,613 ft before tears in the fabric led the crew to begin reducing their altitude. A rupture in the balloon resulted in a precipitous descent, followed by a spark that caused the hydrogen to ignite and destroy what was left of the balloon, leaving the capsule to plummet toward the ground at terminal velocity. The crew just managed to escape using their parachutes. In 1935 the NGS and Army Air Corps decided to make another attempt. Once inflated, the balloon stood 316 ft tall. The gondola was kept anchored to the earth by a team of more than 100 soldiers holding cables. The Explorer II reached a peak altitude of 72,395 ft at 12:30 pm and remained there for 80 minutes. This set a new world altitude record, and one that would last for nearly two decades. The crew became the first humans to witness the curvature of the Earth. Their photography showed the potential of high-altitude reconnaissance balloons. Explorer II included communications equipment, and constant radio contact was maintained throughout the flight with the signal being broadcast across the U.S. and in Europe. The onboard instruments collected data on cosmic rays, the ozone distribution and electrical conductivity of the atmosphere at different altitudes, the atmospheric composition o.…