Germay Me-262 HG III. Me-262 HG III was developed from Me-262 for more high speed & better maneuverbility. (1944). both jet engines embedded in the wing near root of wings. degree of swept wing swepd 35 degree & 45 degree in 2groups. safty margin of top speed is Mach 0.86.( if more than 0.86--> nose down trim-->death). no actual production was availablel.