U-10A The first military "Super Courier" re-designated from L-28A flown in 1957, certified in 1958 Lycoming GO-480-G1A6 (295 HP) 3000 lbs. gross, although flown in service at higher weights, the civilian H-395's are considered the best performing Helio's because of their relatively light-weight 170mph cruise up high 7500ft.
The H-392 "Strato-Courier" was powered by the GSO-480 (340 hp) only one built and set an altitude record over Mexico City in OCT. 1957 @ 31,200FT max. cruise 184mph. 03/01/2006 @ 07:14 [ref: 12658]