Question


I am running a run file with multiple limits.

The first run file has two limits defined using the OR statement.

LIMIT(1) ANGLE FROM EQUIL TO RA0 OR FLD > 10
LIMIT(2) AREA FROM EQUIL TO RA0 OR FLD > 2.82

The second run file has the two limits (as stated above) seperated into four
limits without using the OR command.

LIMIT(1) ANGLE FROM EQUIL TO RA0 > 10
LIMIT(2) ANGLE FROM EQUIL TO FLD > 10
LIMIT(3) AREA FROM EQUIL TO RA0 > 2.82
LIMIT(4) AREA FROM EQUIL TO FLD > 2.82

The output is radically different and inconsistent with our experience.


Answer

After RA0 the righting arm is negative and the area begins decreasing.
If a terminating angle such as FLD occurs after RA0 it would give a lesser
value for the area than the area to RA0 -- the greater the FLD angle the less
the area!  Therefore you would not normally use an area limit without the RA0
being one of its termination angles.