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 TM 55-1905-222-14
6-23
REPAIR PROPELLER AND PROPELLER SHAFT (Continued).
d. Damaged. Notched Edies. The edges of
the straightened propeller shown in
the
figure have notches. Normally notches of
the size shown are not filled If other
vessels are deadlined for repair. Damaged
edge repair is covered In paragraphs i, j
and k below.
e. Repairs by Welding. The location of the
repair governs the kind of weld used and
the care necessary. Root sections of the
blade carry more stress than sections near
the tip and therefore are critical. All
metal deposits above the surface of the
blade will have to be removed.
f.
Repair of Root Sections. Because of the
high stress on the blade between the hub
and 0 4 radius, any repair In the root
section is considered major repair, and a
welding procedure that can be depended
upon to produce a strong, sound weld
substantially free of residual stresses
should be used. Metallic arc welding,
multiple-layer gas welding, and the hot-flow
process are approved methods for root
section repair.
g. Repairs In Sections Outside The 0.4
Radius.
Repairs In these areas are
relatively minor and can be accomplished
with the use of multiple-layer gas welding
or metallic arc welding.
NOTE
The use of silver brazing alloy or any other low temperature brazing alloy is not
erosive action of high velocity water.
6-123
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