Hi, i have become a regular reader of this forum and learnt much from it, but this is my first post: a question about take-off power settings.I am aware that for cost & engine longevity reasons, de-rated power take-offs are normal procedure in real-life.Today i have downloaded the new file '767_PIC_checklist.zip' from AVSIM. I was particularly interested to see the 'thrust reference' table giving what i assume are the temperatures to enter into the FMC for a de-rated take-off, and the resultant N1 power setting. My question: is there a table or graph available anywhere (even approximate - i realise that this is a simulation) showing aircraft weight & runway length, and giving the reduced power N1 setting for these values. I would then be able to enter a de-rated temperature setting into the FMC for take-off at the particular weight and known runway length.The original Wilco 767 PIC manual merely states that the above is 'beyond it's scope'.Any help & advice much appreciated.Geoff

The answer is here:http://forums.avsim.net/dcboard.php?az=sho...ing_type=searchGreat question - a search provided the answer.Daryl ShuttleworthDS 3339http://vatsim.pilotmedia.fi/statusindicato...tor=OD1&a=a.jpg

Thanks Daryl,Indeed, very informative but I wonder if the original posters might be willing to provide the diagrams again. They are long gone off the servers so the points made are kind of useless.Ben

Hi Geoff,I know this is not for the 767 but you may find the info here useful.http://www.b737.org.uk/assumedtemp.htm

HiThanks for the replies.Another request for the posters of the original article to provide the diagrams again please.Interesting to note the correct terminology from the 737 article referred to above; 'De-rate' being something quite different!Regards, Geoff

You can only merely take a wild guess at what the assumed temperature will be in 767PIC, no matter what tables/charts/runway lengths/weight's you use.Real world operators use performance manuals, a graph for each airfields runways they fly to and the given conditions (slope, pressure, wind component and temperature).You might aswell guess, it's just as realistic.Cheers[br][/img][/font][/b]