ARMY TM 10-1670-276-23&P
AIR FORCE T.O. 13C5-29-2
NAVY NAVAIR 13-1-29
2-24. Gore Section (cont).
(c) Pressure-sensitive (iron-on) patch. This method of applying a basic patch is a heat and pressure (iron-on)
technique using pressure-sensitive-coated cotton balloon cloth. This method is limited to use on the cotton muslin
canopies such as the 26-foot cargo parachute. A complete canopy section replacement will be performed when an
individual section has been patched extensively with the pressure-sensitive patch material and an apparent stiffening of
the section occurs. The stiffening effect may adversely affect the proper layout and packing of a parachute canopy.
Apply a pressure-sensitive (Iron-on) patch as follows:
Smooth all wrinkles from material surrounding the damaged area.
Cut a piece of pressure-sensitive-coated cotton balloon cloth large enough to extend 1 Inch beyond all edges
of the damaged area If damaged area extends to a point within 1 inch of upper lateral band, only a sewn
patch as outlined In (b), above, will be allowed.
Place coated cloth patch over damaged area with adhesive side facing down. If damaged area has no
material missing, patch will be applied to the Inside of canopy only. Whenever damaged area has a space
between the edges of material which indicates that material is missing, patch will be applied to both inside
and outside of canopy (figure 2-43).
Using a household-type electric iron with heat regulated for cotton material, apply heat and pressure
simultaneously to patch material for at least 30 seconds. Insure that all of patch material is subjected to heat
and pressure, and that all edges of patch have adhered to canopy material. Also Insure that temperature of
iron remains constant during patch application effort and that no other part of canopy is underneath area
(4) Restenciling. As required, restencil identification markings using procedures in paragraph 2-19.
b. Replacement. When replacing gore sections, use 3.8 ounce cotton muslin cloth of same color as that being
replaced. If the same color cloth is not available, another color may be used. When replacing section 1 of gore 1,
restencil gore number and information data block on replacement section. For other gores, stencil gore numbers as
necessary using procedures in paragraph 2-19. A gore section which is damaged beyond repair will be replaced as
(1) Gore section 1.
(a) Cut a piece of 3 8 ounce cotton muslin cloth 2-1/2 inches longer and 1-1/2 inches wider than original gore
section (figure 2-44)
(b) Place cut material over damaged area and using a suitable marking device, trace outline of original gore
section, including width of radial tapes on each side of damaged area and width of skirt reinforcement tape
(lower lateral band) at bottom. Allow material to extend 1 inch beyond original gore section upper edge, 1-
1/2 Inches below lower skirt reinforcement tape, and 3/4 inch beyond outside edge of each of the radial tapes
Trim excess material, as required.
(c) On upper end of cut material, make a double 1/2 inch-wide foldunder. Secure foldunder with a single row of
stitching sewn through foldunder center across width of material. Stitching will be 7 to 11 stitches per inch.