Spinash,
The 1900 tailets and finlets are there mainly to increase the CofG range from 4% MAC to 40%MAC making it real easy to load the aircraft.
The lears have a lot of problems with stability, espically up high. The dorsal fins are there to improve the dutch roll behaviour of the aircraft.
Don't worry about not understanding aerodynamics, people designing aircraft make a lot of assumtions becuase its just too hard to work out exactly whats happening. Even today no one is ever sure that a new aircraft type will come back successfully from its test flights.
John,
Never seen a table for stall speed vs CofG in any AFM or any dial/ecam/PFD symbol for CofG position in real life aeroplanes...
The amendment status of the FAR etc on the TCDS is relevent as you pointed out, but the current amendment status reflects the changes which may prevent future accidents.
Regulatory and flight test advisory data (whatever they are called I thought something else) are a good read when you trying to work out how to comply with the regs, and the reasons behind them.
I would have to blow the dust off the books to read up on the utility cat stuff (not real interested in doing that), from memory it was just load factors changing the V-n diagram, maybe the aft CofG limit has to do with the design loads on the empenage...
[This message has been edited by Zeke (edited 23 May 2001).]