Quote from TO MEMO:
But still can`t get it why after all calculations "with clearway" option gave me a lower TO weight than "without clearway". It should be the opposite.
[Unquote]
I'm not sure either. Is there any chance that you could post all the actual figures you are using for the two cases?
There's no doubt that the DECREMENT for the "with clearway" case should be greater than the one for the "no clearway" case. But that does not in itself mean that the resulting figure for contaminated RTOW will be lower than the contaminated RTOW if the clearway is closed down. But, as I said when editing my first post, each decrement has to allow for the "worst" case, and your 10% clearway is comparatively short.
If you run the actual figures past us, there's a good chance that I or someone else will be able to sort this out from the unhurried comfort of our armchairs... [I well remember what it's like trying to make sense of decrements in the left seat of an A320, or whatever, as schedule approaches.]
Chris