Me 163 references

The second part by Stephen Ransom and Hans-Hermann Cammann is equally well researched as part one.

Some errata reported by readers:

• page 391: in note 9 it is stated that 945 km/h is Mach .85 at sea level. This is actually .77 at standard sea level conditions (the tests were in autum at Karlshagen). That explains why Hohmann didn't experience Mach-related problems.