Stans, 11th April (seen outside on a short stop in morning); - PC 7 Mk II for IAF sn 730, P 141 (HB-HDO), engine tests - PC 21 for RSAF sn 163, 909 (HB-HWI), engine tests sn 162, 908 (HB-HWH), flying sn 158, 904 (HB-HWD), flying sn 157, 903 (HB-HWC), flying Interesting: Yesterday, the PC 21, sn 177,...