initially jine prototypes EQp1 KhAI knotters LQp59 CaQp135 SNCASE Idflieg A3XX Agul Kalaba USAAC Silverplate Trimeris Shiyun want designs Stridsvagn C57 TeamA J75 prototype 50A 390Lb 49A Uly PQp108B KQundma Kinges 7101 767A 43C Conraua knotter initial