In a previous article, Matt Young said:
my head and I thought I'd throw it out for the flying gurus to take a
stab at if I can explain my question.

I can't give you a full answer, but the start of that answer is something
like "pendulous vanes". The AI is corrected to local horizontal.


--
Paul Tomblin http://xcski.com/blogs/pt/
"Mission Control clears SMS-1 to Canaveral via thrust vectors, Up, Hold
Earth, right turns, expect further clearance in ten days."
http://www.avweb.com/news/usedacft/181561-1.html