«Father of Russian Aviation» : How do people learn to fly

* Temperature classification is given on K.F.Bogorodnts-

But while instructors consider: that is accessible to Yefimov, is unattainable for others.

— Catch!

In general, the project basically the realizable. But represent, how many it would be necessary pair, water and fuel that though a little to fly by where it is necessary? Therefore to project realisation at all were not accepted.