The book "Pressure on a plane during its normal movement in the air" with an autograph by Konstantin Tsiolkovsky in 1930.

The book "Pressure on the plane during its normal movement in the air" with a handwritten address and an autograph

The text of the appeal: "To the respected academic student Mitrofan St. Zverev from the author"

The appeal is dated December 1, 1930.

Konstantin Tsiolkovsky published 148 works during his life (mostly articles and small pamphlets), more than 600 unpublished manuscripts have been preserved in the archive, most of which were published in the 1990s and later. In a short period (1917-1935), Tsiolkovsky published four times more works than in his entire previous life.

In the work "Pressure on a plane during its normal movement in the air", the author sets several tasks, including the definition of "air compression in the front opening of a flying aircraft or other projectile."