The Ryan PT-22 Recruit was the first monoplane primary trainer aircraft used by the United States Army Airforces. The PT-22 had a notoriously high landing speed for a primary trainer, specified to give pilots a realistic experience when compared to fighter aircraft. The PT-22 used a Kinner engine with a particularly idiosyncratic exhaust configuration which gives the aircraft its very particular sound and sonic signature.
Ryan PT22 Recruit, recorded June 2007
Ryan PT-22 Recruit recorded August 2009 at the Shuttleworth Collection, Old Warden Aerodrome.