Hi all in the forumI am at the stage in the advanced tutorial where I have read every word and catagorised "what I understand" and "what I will understand with research" and "what I cannot find an aswer to", and there is only one question in the last topic (at least til I try and fly it) and that is regarding de-rated take offs. I understnd why it is done and how it is done. What I do not unerastand is: The OAT is entered into the fmc in degrees C because that is the format entered. But is the de-rated temperature of 58 degrees in Farenheit or Centigrade? as I do not just like to enter it as directed and not understand the units I am dealing with. If it os degs. C then the de-rate is by a difference of 53 degs C. If it is in degs F then the difference is 17 degrees F. I have never used the de-tated take off and have no idea what a realistic difference would be. Also coming from the UK amd always entering fuel in Kg *1000 its quite a learning curve to convert and enter in lbs*1000. any help would be appreciated then I feel i have got enough understanding to try out the tutorialJohn Calleja (BAW 352 armchair pilot)

Hi all in the forumI am at the stage in the advanced tutorial where I have read every word and catagorised "what I understand" and "what I will understand with research" and "what I cannot find an aswer to", and there is only one question in the last topic (at least til I try and fly it) and that is regarding de-rated take offs. I understnd why it is done and how it is done. What I do not unerastand is: The OAT is entered into the fmc in degrees C because that is the format entered. But is the de-rated temperature of 58 degrees in Farenheit or Centigrade? as I do not just like to enter it as directed and not understand the units I am dealing with. If it os degs. C then the de-rate is by a difference of 53 degs C. If it is in degs F then the difference is 17 degrees F. I have never used the de-tated take off and have no idea what a realistic difference would be. Also coming from the UK amd always entering fuel in Kg *1000 its quite a learning curve to convert and enter in lbs*1000. any help would be appreciated then I feel i have got enough understanding to try out the tutorialJohn Calleja (BAW 352 armchair pilot)

Hi!Do a search about FLEX temp in this forum. There are lots of article about it.Converting Lbs and Kgs is quite simple. If you have 100 000 Lbs then you have 100 000/ 2,2046= 45 360 kgIf you have 45 360 Kg then you have 45 360 x 2,2046=100 000 LbsSo use 2,2046 figure for your conversion. It