This lot is closed for bidding. Bidding ended on 3/29/2012
Konstantin Tsiolkovsky partial document signed, written entirely in his hand, on the subject of a rocket's speed in flight. In Russian, untranslated, but bearing mathematical calculations indicating content. Two pages on one sheet measuring 4.75'' x 7.5'', undated. Dampstain to left edge, else very good condition. Rare item from the rocket designer who laid out the basic principles of modern space flight.