enacademic.com
impact pressure - Aviation dictionary - Enacademic

i. The pressure of a moving fluid brought to rest that is in excess of the pressure the fluid has when it does not flow (i.e., total pressure less static pressure).

enacademic.com
Pratt & Whitney Canada PT6

The PT6, manufactured by Pratt Whitney Canada, is the most popular turboprop aircraft engine in history. [ [http://www.utc.com/profile/facts/history.htm United Technologies history] ] It is produced in a wide variety of models, covering the…