Vmbe
I am trying to reconcile the actual with the theoretical and having trouble with it - possibly the units.
Vmbe is a function of how much kinetic energy the brakes can stop (using worn brakes to the overhaul limit).
So with 70mj brakes the kinetic energy is = 1/2mv^2.
If you know your mass (as you would for take off!) you should be able to get a reasonable approximation of V1?
However, I have tried all sorts of permutations with units but cannot make it work, even roughly. I have tried to reverse the formula using performance data but cannot get anything within the range of 70mj (in order to account for the worn brakes).
Can anyone help?