FLIGHT TRAINING INSTRUCTION T-45 WEAPONS/STRIKE - Cnatra

T-45 WEAPONS/STRIKE CHAPTER THREE
5. Armament Datum Line (ADL). The origination of the sight angle, it is a fixed reference
line through the longitudinal axis of the aircraft that parallels the flight path at 450 KTAS. The
ADL can be found in the HUD by drawing a straight line across the top of the airspeed and
altitude boxes.
NOTE
At 450 KTAS, the Velocity Vector and ADL are equal in a zero
headwind / tailwind condition. With a headwind, the ADL will be
shallower than the Velocity Vector and with a tailwind, it will be
steeper than the Velocity Vector, “crabbing” the aircraft, in a
vertical plane, to maintain the aircraft’s vertical flight path (flight
path angle).
6. Sight Angle. The angle (in mils) below the ADL which is the sum of the trajectory drop,
angle of attack and parallax of a particular dive. The setting can be found on the delivery data
table.
7. Trajectory drop. The amount the weapon falls during its ballistic time of flight due to
gravity effect, measured in mils. This can be found in the delivery data table.
8. Mil. A unit of angular measurement that subtends 1 foot at 1,000 feet. It is 1/6400 of a
circle. 1 mil = 1 foot at 1,000’. There are 17.45 mils to every 1 degree.
9. Time of Fall. The time from release to impact.
WEAPONS DELIVERY THEORY AND PRINCIPLES 3-3