[Jukka Juutinen]

Adriano:

1. The best source for information on issues like spinning characteristics are original test report by either manufacturer or government testing facilities' test pilots. For example, the USN required that companies demonstrate their fighter designs to meet certain spinning and recovery standards. Now, the woeful state of literature on German aircraft in English is demonstrated by the fact that I never seen in any book what were the RLM's airworthiness requirements for spinning. Probably there is a book on whether Adolf Galland wanked with his left or right hand...

2. German pilot manuals are very poor in providing any sort of non-numerical handling information. E.g. the Bf 109 "pilot's notes" is basically a description of flight controls and systems.

3. As the recent engine book by Calum Douglas demonstrates, there are massive amounts of new discoveries possible in the German archives with thorough research.

4. The Luftfahrt Dokumente volume on the Ar 234 is also a testimony on the existence of such technical documentation that supposedly does not exist.