once described as "radar calibration aircraft". The R1s have not suffered the same rate of fatigue and corrosion as the MR2s. One R1 was lost in a flying
(原始内容存档于2012-11-23). Marc Fries (mfries01). Coloma, CA 22 Apr 2012 1452 UTC. Radar Obs of Meteor Events. 23 April 2012 [2012-04-25]. (原始内容存档于2012-04-27).