METAL BODY REPAIR - OD1653 - LESSON 2/TASK 2
(4) Honeycomb Core. One form of the honeycomb core has slot-like water
passages extending vertically through the core between sections of honey-
like air coils. Each section has an offset stamped metal ribbon around the
outside and bent fins within.
Adjacent sections are soldered at the
offsets, which are about 1/4 inch wide and extend about 1/4 inch in from
each face of the core. The ribbon at the top of a section is called the
header strip. These ribbons are overlapped, forming a seam, to construct a
single tube or section. Note that this seam, extending from the center of
the header strip downward to span the side walls of three entire cells,
provides a broad contact area to seal the ribbons. So many different shaped
air cells have been used in honeycomb construction that it is impracticable
to discuss them all.
After learning to recognize a few representative
types, the repairman should be able to analyze the construction of any other
core. In a U-shaped air-cell core, air cells are formed by U-shaped fins
which zigzag from the tip of the core to the bottom, deflecting the air.
The water drops almost directly from the upper tank to the lower tank in