2. Wood Contour Supports
A. When using wood contour supports (cradles) under the fuselage, make sure to place them such that the cradle is centered on the frame station centerline.
B. When using cradles under the wings, make sure to place them only in the areas defined on Figure 3-65.
C. The cradle supports must be fabricated to conform closely with the lower surfaces of the wings and the fuselage. This will eliminate the potential for excessive point loads which could damage the airplane. Make the supports with five laminations of 1 inch (25 mm) wood (plywood) and some 1/2 inch (13 mm) diameter bolts. Put four pads of 1/2-inch (13 mm) material (grey felt or rubber) with a 10-ounce cover (duck canvas or equivalent) on the interface surfaces.
D. Figure 3-65 through Figure 3-68 provide data on construction of cradles and the support structures (cribs) below them. Figure 3-66 provides the specific wing fuselage ‘‘slope radius’’ and dimensions for wing station 231.5. See Figure 3-68 for an example of the use of cradle supports and associated cribbing to support the fuselage during a recovery operation.
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Figure 3-65 WING CRADLE DETAILS
[1] SCRIBE OR PAINT ON CRADLE (F.S. EQUALS FRONT SPAR)
[2] SEE Figure 3-66 FOR WING CRADLE CONTOUR COORDINATES
[3] SEE Figure 3-67FOR CRADLE CONSTRUCTION DETAILS
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Figure 3-66 WING CRADLE CONTOUR COORDINATES
F.S. CONTOUR COORDINATES
X *[1] Y
INCH CM INCH CM
-5 -12.7 16.4 41.66
0 0 15.2 38.61
+5 +12.7 14.2 36.07
10 25.4 13.3 33.78
15 38.1 12.45 31.62
20 50.8 11.76 29.87
25 63.5 11.15 28.32
30 76.2 10.65 27.05
35 88.9 10.25 26.04
40 101.6 9.92 25.20
45 114.3 9.68 24.59
50 127.0 9.50 24.13
55 139.7 9.40 23.88
60 152.4 9.30 23.62
65 165.1 9.30 23.62
70 177.8 9.30 23.62
75 190.5 9.32 23.67
80 203.2 9.36 23.77
85 215.9 9.42 23.93
90 228.6 9.48 24.08
95 241.3 9.50 24.13
100 254.0 9.55 24.35
105 266.7 9.62 24.43
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