Grigorovitch M9 Also called ShCh M-9 or Shchetinin M-9 this Russian ww1 biplane flying boat was a development of the M-5, ready in the fall of 1915, which first flew on January 9, 1916 at Baku. By September 17, 1916, Jan Nagórski, test pilot, became the first to make a loop with a flying boat, worldwide. A good indicator of its agility and handling characteristics. The Grigorovitch M9 became the best-seller of the company, being produced by the hundreds (an estimated 500+) by Shchetinin up to the civil war. This…