assumed temp
Hy
One question regarding assumed temperature and selected speeds for take off.
Untill now we used to do like this:
I.e : TOW 48T.....check assumed temp calculations and find out we can use max temp 50C -coresponding to a max TOW 53T. Then go with the temp on other tables ,and find out speeds for 48T,then correction for 50C ,add-- resulting final take off speeds.
Now ,there seems to be some other idea on our company:
48T-find out 50C,and take the speeds from the assumed table,even though this speeds are calculated for a max TOWOF 53T.
The differences can be high,especially at low weights:
V1-119kts for TOW 45ts and V1-135 or more for 53T (from memory )
What do you think?
Is it unsafe?Is it like doing improved climb ?
From what I remember the braking force is directly corespondant to the mass of the object:higher the mass ,higher the braking action.
So,for a low TOW-low V1,higher TOW ,higher V1.
Then ,I guess is not safe to use v1 coresponding to a higher TOW for a lower TOW.Even though inertia would be bigger for a higher TOW,the braking action will be higher.For lowr TOW,lower inertia but also lower braking force,so if you use higher than calculated v1-an invitation for overrun.Am I right?
Thks..
Brgds Alex