Please keep in mind that A2A is not equal to real life flight tests. These comparisons say and mean nothing.

That is not to say that the CoD data is correct but who knows about the truthfulness of A2A data.

Just because A2A claims their models be absolutely accurate (that's their selling claim) does not make them absolutely accurate per se.

Interesting stuff, Snapper, thanks for posting, even if it is a depressing read....

The A2A data doesn't enter into it. Please read my post more carefully next time. I was drawing attention to CoD's offline vs online performance data. However, 1C should already be aware of this discrepancy -- it IS their sim after all.

Just a wild guess and don't laugh...is possibly a head wind:-P

Definitely a good thought, Slip. I don't believe winds are programmed in either the offline or online (ATAG server). Even so, I'm not sure wind would have too much (if any) effect on INDICATED airspeed per my chart. It certainly would on TRUE air speed.

Yea I remember having trouble turning on ground in ATAG 1

I'll check into that. Engine torque would also affect ground handling AFAIK.

BTW, I'm no test pilot -- real life or virtual. I certainly invite anyone/everyone to try this or any variation and/or aircraft. It was Camber's post somewhere in this forum that got me to wondering about offline to online. The A2A data I had done earlier for my own interest -- apples to oranges as I've already expressed on this forum.

Wind does not/cannot affect IAS or TAS (True) , it will affect Ground Speed. From IAS you determine TAS you then apply the wind effect to get Ground Speed.

I reasoned that wind would be the only variable between the on-line and off-line test's done by Snapper...pitot tubes have been installed in RL with environmental faults (inherent errors) magnified due to placement error, and after all we are dealing with a game here, and proper coding being done.:-P

Thanks for the clarification, IvanK!