CT7 turboprop&colon; Turboprop version of CT7. Tiltrotor aircraft vector thrust via rotating turboprop engine nacelles. It excludes turboprop and reciprocating engine powered airliners. There are still further subdivisions for piston-engined, turbojet, turboprop, and rocket-engined aircraft. Services at the airport are limited to aviation fuel for both piston and jet/turboprop aircraft. This included a new fleet type consisting of three ATR 42 Turboprop aircraft. Some were rebuilt and re-engined with turboprop engines. They are expected to compete with single turboprop aircraft. Reviews have compared its performance to high-performance single turboprop aircraft. It was also the first four-engined turboprop. The President also has military aircraft, helicopters and a presidential turboprop for his use. O-435 engine with a Pratt & Whitney PT6A-20 turboprop powerplant. The general layout of a turboshaft is similar to that of a turboprop. Apart from the above, there is very little difference between a turboprop and a turboshaft. Production continued with further variants introducing pressurisation and turboprop engines.