TM 1-1520-238-MTF
4-16
17. During operation checks, the HIT TGT margin
will fall within the upper and lower limits.
18. The following is an example of a HIT baseline
calculation:
a. FAT = 15 C
b. PRESS ALT = 500 FT
c. TGT = 665 668 667
d. Average
TGT 665 668 667
3
667C
e. Table value of TGT (for 15 C FAT + 500 FT
altitude) = 669 C
f. Average TGT minus table TGT =
667 C – 669 C = -2 C
g. TGT acceptance limit
-2 C + 20 C = + 18 C
-2 C – (20 C) = -22 C
h. Therefore an operational HIT check (TGT
margin) that is less than + 18 C and greater
than -22 C is acceptable.
J. ROTOR SMOOTHING PROCEDURES.
1. General.
a. Main rotor pitch link adjustments
approximate one inch tip travel per one flat
adjustment. Use pitch link to correct track
variances of greater than one half inch
where tip path relationships are constant
between flat pitch and hover tracks.
