Assumed temp. calculation B737
(Yes, I have used the search function)
I think I understand the basics of assumed temperature - the whys and partly the hows. There seems to be a formula, using Kelvin - not Celsius;
Reduced N1 = Full N1 x Square route of (Ambient temp / Assumed temp)
...this from Chris Brady's web page.
This formula does not take into consideration the aircraft mass and available runway - so there HAS to be something more to it. How does the FMC use the excess runway available, and actual take-off mass, to calculate the N1 for take-off?
Does it do a series of calculations or interpolations? Is it really a single formula? What have I missed?
Anyone care to shed some light on the subject?