e. Tie a plumb bob or any heavy
object to end of a long string.
Hold other end of string at
intersection of side plate and
extension plate behind drivers
hatch (M577A2 and M1068
only).
f. If plumb line aligns with third
track shroud cover screw, slope
is about 30%. This is
maximum slope. Entry is OK
at crawl speed. If plumb line
falls to rear of screw, slope is
less than 30% and entry is
OK (M577A2 and M1068
only).
7. Determine slope
TM 9-2350-261-10
percentage by
measurement as follows:
a.
b.
c.
Height of slope. Measure
vertically from top of slope to
base of slope.
Length of slopes base.
Measure horizontally from
base of slope to point where
slope starts.
Divide base into height then
multiply answer by 100 to
obtain slope percentage.
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