 A flapped version called the G104 Speed Astir was also produced.The latest in the Astir line is the G102 Standard Astir III, designed by Burkhart Grob and built by Grob Aircraft as a development of the original G-102.One Astir (now residing at the Steven F. Udvar-Hazy Center), flown by Robert Harris, broke the world absolute altitude record at 49,009 ft (14,938 m) on 17 February 1986.