Pratt & Whitney Canada (P&WC) appears to be working on a successor to the best-selling PT6 turboprop engine it refers to as the PT9A-11 according to regulatory filings with the US Federal Aviation ...
Pratt & Whitney Canada (P&WC) is still working on a new turboprop engine called the PT9A-11 and is also continuing to seek certification of a new helicopter turboshaft powerplant called the PW220A.