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==Turboprops==
[[File:Piaggio P-180 Avanti Rennes 2010 (cropped).jpg|thumb|[[Piaggio P.180 Avanti]]|left]]The [[Fédération Aéronautique Internationale|FAI]] lists a [[Piaggio P.180 Avanti]] as the fastest propeller-driven aircraft with a speed of {{Convert|927.4|km/h|mph kn|abbr=on}} "over a recognized course", in this case [[Fort Worth]] to [[Atlanta]], set on 6 Feb 2003 by Joseph J. Ritchie.<ref>{{cite web |title=FAI record 7627 |date=10 October 2017 |url=https://fai.org/record/7627 |access-date=4 September 2020 |ref=fai-recognized-course}}</ref>[[File:Russian Bear 'H' Aircraft MOD 45158140.jpg|thumb|[[Tupolev Tu-95]]MS]]Previously, the ''[[Guinness World Records|
Overall, probably the fastest aircraft ever ''equipped with'' (but not driven exclusively by) an operating propeller was the experimental McDonnell XF-88B, which is a variant of the jet-powered [[XF-88 Voodoo]] made by installing the [[Allison T38]] [[turboprop]] engine in its nose while retaining its original [[turbojet]] engines.<ref>{{Cite book |last=Becker |first=John Vernon |url=https://books.google.com/books?id=OVjp4CxuMhQC&newbks=0&printsec=frontcover&pg=PA136&hl=en |title=The High-speed Frontier: Case Histories of Four NACA Programs, 1920-1950 |date=1980 |publisher=Scientific and Technical Information Branch, National Aeronautics and Space Administration |volume=NASA SP-445 |location=Washington, D.C. |page=136 |pages= |language=en |chapter=IV |asin=B0006E40HY |lccn=80607935 |oclc=1017203631}}</ref> This unusual aircraft was intended to explore the use of propellers in high-speed flight and, when operating in conjunction with the turbojet engines, has achieved speeds of approximately Mach 0.90 in level flight. In a dive, it has achieved supersonic speeds, up to slightly above Mach 1.<ref>{{Cite journal |last=Hammack |first=Jerome B. |last2=Kurbjun |first2=Max C. |last3=O'Bryan |first3=Thomas C. |date=1957-07-10 |title=Flight Investigation of a Supersonic Propeller on a Propeller Research Vehicle at Mach Numbers to 1.01 |url=https://ntrs.nasa.gov/citations/19930090296 |journal=NACA Research Memorandums |chapter= |series= |language=en |location=Washington, D.C. |publisher=National Advisory Committee for Aeronautics |page=11 |s2cid=118005344}}</ref>
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