Mr Vickers... let's set the record straight - I'm always confused.
Mr Piper... I understand perfectly why you would defend your FDE
files as I have learnt they take a considerable amount of effort
and time to produce and you don't want people or companies
pilfering for profit, so i share your concern but probably not to quite the same degree as I have to get good at this first.
Victor - thank you for the formula - as previously stated it did
help in a round about way.
Dyl Roberts - spot on mate - .... it's a hobby and from my point
of view I'm doing this for nostalgic reasons and hopefully to give
others pleasure.
D0mokun - No......

send me a private email instead stating
exactly the information you require and I'll try and help you. I
have to connect via a slowbile phone and it takes ages for the
forum to show up on my PC. Helps to know the SHP in the first
place and remember there is a slight difference between SHP
and HP but what I’ve found is that a small margin of error here
doesn't overly affect the final performance - a slight adjustment
of gear reduction ratio can make all the difference, but obviously
other factors come into play.
As a final footnote to this, The reason I asked the question in the
first place was because there doesn't seem to be any definitive
documentation that explains flight dynamics and all the various
conversion factors for flightsim.
Luckily my father is quite well versed in most of it but I wouldn't
have asked the question if he had known.