1919 Cover Portable Hangar Airplane World War I M Gabriel Voisin Airdrome SCA3 TM5 Also there is a very

Also there is a very small pale spot in upper left corner

There are three small staple holes in the left margin --please see image

bottle tree

We are assuming this image was taken in either 1937 or 1938

1919 Cover Portable Hangar Airplane World War I M Gabriel Voisin Airdrome SCA3 TM5 Also there is a veryPlease note that this is a cover only. This is an original 1919 two color cover for Scientific American depicting inflatable airplane hangars used during World War I. During trench warfare, regular airdromes were used, but once the war switched to open fighting with the armies on the march, the need for portable hangars became imminent. M. Gabriel Voisin, a well known airplane constructor, came up with the idea of the inflatable shelters. Please note