21. The newer Williams International F112-WR-100 turbofan engine increased range by about 50 %. 22. The power plant used is the Lotarev D-36 turbofan engine . 23. The upgrade to turbofan engines provided a significant increase in performance, safety and reliability. 24. The aircraft are powered by two Garrett TFE731-2 turbofan engines . 25. _1961 : The turbofan engine , an industry first, is introduced. 26. A separate partnership was formed between Adour afterburning turbofan engine . 27. The 737 Classics added capacity and incorporated CFM56 turbofan engines along with wing improvements. 28. The X-50A was powered by a single conventional turbofan engine . 29. The aircraft seats 9, and features twin Pratt & Whitney Canada PW306D turbofan engines . 30. The Superjet uses PowerJet SaM146 turbofan engines developed by PowerJet that provide of thrust.