This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Displacement roll with instruction diagram. en displacement roll is type of barrel roll used to decrease turn radius Source United States Navy Naval Air Training Command NAS Corpus Christi Texas Flight training instruction manual Rev CNATRAP tpub htm US Navy PDUSGovMilitaryNavy Air combat manoeuvring