Actually I have been flight simming for over two years now. I prefer to make it as accurate while still holding that there are limitations. Over the years I have flown many great payware craft such as the A319, A320, A321, 757, 737NGX, DC10, the list goes on. The only thing I was searching to do with this thread is flesh out fuel planning. Until this point I have, for the most part, depended on other sources for fuel calculations. I did not fully understand aspects such as bias, which doesn't apply to flight sim unless you are flying the 737NGX, supplemental fuel, the applications of crosswinds, tailwinds, and headwinds, et. el. So fun is always first and has been over the years. Not an issue at all but thank you for mentioning it. In hind sight I think I should have opened this thread in the general area since I was not asking about the 727 in specific.