ELEVATOR-FREE NEUTRAL POINT
It is evident from the preceding comment that the NP of a tailed aircraft when the elevator is free is given by (2.3,23) as
(2.6,10)
Alternatively, we can derive the NP location from (2.6,5b), for we know from (2.3,5) that
(a)
Since CmSe is of different form for the two main types of aircraft, we proceed separately below.