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1.16 Carefully trim the damaged fabric, cutting along the damaged area line [Figure N]. Next cut
the diagonal lines connecting the corners [Figure O]. Cut all the way to the basting hole at
the inside corner.
1.17 Fold the fabric along the patch fold line and pin in place [Figure P]. This edge should be
parallel to the outside seam. Sew around the inside of the patch approximately 1/16" from
the edge and again overstitch the ends a minimum of 1.25" [Figure Q].
1.18 Release tension on the threads and trim. Remove the canopy from the machine. Inspect
completed patch.
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2.0 INSPECTION:
2.1 The ripstop weave of the patch should align with the weave of the canopy.
2.2 The patch should be square with good sharp corners.
2.3 Stitching should be even and parallel with the outside edge of the patch.
2.4 Inside corners should be square with no raw material showing. Inside row of stitching should
be parallel with the outside row.
2.5 Tension should be even from both inside and outside view.
2.6 Overstitch of the ends should be minimum of 1.25".
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Parachute Repair Procedure
TITLE: 7.1.4 Round Canopy – Panel Replacement
NUMBER OF PAGES: 2
APPLICABLE PRODUCTS: All round canopies; main and reserve.
DESCRIPTION: Complete replacement of a panel section of a gore of a round canopy.
AUTHORIZED REPAIRMEN: FAA Master Parachute Rigger
MATERIALS: E thread—color to match
Fabric—type and color to match
MACHINES: 301 Straight Stitch—Light Duty 7-11 SPI
EQUIPMENT:
Scissors
Seam ripper
Marking pencil
6" ruler
Large pin board
Straight pins
PROCEDURE
1.0 Note: This process of replacing the panel is in reality a panel patch and is similar to that used
in making a basic canopy patch. Because of the time and difficulty involved in removing and
replacing the actual panel, that technique is best left to the canopy manufacturer. This technique
is the more commonly accepted practice for major panel repair. The major issue to be
dealt with in this technique is that of the amount of shrinkage that occurs during the repair.
The larger the area of the panel, the more shrinkage there will be. The following procedure
will describe a panel replacement on a block constructed, noncontinuous line canopy. A bias
constructed canopy will be similar but more “fullness” will need to be allowed for in the cutting
of the panel and sewing.
1.1 Lay the canopy out inside out on the pin board. Pin the canopy in place placing tension on the
seams and making sure they are straight.
1.2 Cut a piece of fabric larger than the damaged panel by approximately 6" around all sides.
Make sure that the weave of the panel matches that of the canopy. For a block constructed
canopy, the bolt of fabric will run parallel down the radial seams of the canopy. For a bias
constructed canopy, the bolt will run parallel to the
diagonal seams.
1.3 Trim one side of the panel to align the ripstop
weave with the cross seam.
1.4 Fold over the edge of the panel fabric approximately
3/4" and pin in place aligning the edge with
the outside of the cross seam [Figure A].
1.5 Smooth out the panel fabric over the damaged area
and align the opposite edge over the opposite cross
seam. Cut the panel fabric approximately 1" wider
than the panel. Fold the edge under and pin in place.
You will now have the top and bottom cross seams
of the panel in place [Figure B].
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7-14
1.6 Stitch the outside row of stitching starting and finishing approximately 1" short of the radial
seams.
1.7 Take the panel fabric along the radial seam and trim approximately 3/4" from the outside
edge of the radial seam. Fold under and pin in place. Repeat for the opposite radial seam
[Figure C].
1.8 Overstitch the end of the cross seam that was left open a minimum of 2" and proceed to and
down the radial seam and then overstitch the open end of the cross seam. Repeat for the
opposite side. It is advisable to hold a bit of tension on the seams as you sew to minimize the
shrinkage.
1.9 Turn the canopy right side out. Trim out the damaged panel along the seams [Figure D], leaving
approximately 5/8". Also trim the excess edge of the panel as needed.
1.10 Fold the edge of the canopy under the panel to create the seam and pin in place.
1.11 Sew the inside of the panel seam in place. Again, hold tension on the fabric as you sew to
minimize shrinkage.
1.12 Remove the canopy from the machine being careful not to pull on the threads. Trim the
threads. Inspect the panel.
2.0 INSPECTION:
2.1 Check the weave alignment of the fabric panel to the canopy.
　
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本文鏈接地址：Parachute Rigger Handbook(72)