IMPROVED COTTON AIRPLANE FABRIC. 
17 
Table ■ 12.-— Results of tests op the Signal Corps and the Bureau of Markets on 
cotton airplane fabric made from 3/80's yarn. 
6 
Stretch in inches at different loads. 
Breaking 
strength. 
ft 
Construction. 
Test- 
ed by 
Oz. 
a 
Warp. 
Filling. 
per 
square 
o 
Warp, 
lbs. 
Fill- 
ing, 
lbs. 
yard. 
10 lbs. 
20 lbs. 65 
bs. 
10 lbs. 
20 lbs. 
65 lbs. 
l 
3/80's 68 by 68 plain weave 
made from No. 1 (fan- 
cy) Pima American 
M.... 
.36 
.54 
95 
.21 
.32 
.66 
79 
86 
} 3.9 
Egyptian gray yarn, 
single twist, 35.6; ply 
S.C. 
.43 
.59 
96 
.42 
.54 
.93 
83 
87 
twist, 20.6 
2 
Same as No. 1, except I 
made from mercerized 1 
yarn 1 
M.... 
s.c. 
.24 
.38 
.36 
.52 
67 
80 
.24 
.31 
.36 
.41 
.66 
.69 
75 
'81 
84 
82 
\ 3.9 
8 
3/80's 68 by 68 plain weave! 
made from No. 1 (fan- 
j 
cy) Pima American 
Egyptian gray yarn, 
M.... 
.24 
.38 
73 
.21 
.32 
.70 
83 
86 
} 4.06 
S.C. 
.19 
.51 
85 
.19 
.51 
.85 
86 
88 
single twist, 33.8; ply 
twist, 18.5 
9 
Same as No. 8, except 
made from mercerized 
yarn ! 
M.... 
'S.C. 
.26 
.40 
.41 
.52 
70 
80 
.18 
.38 
.33 
.46 
.67 
.76 
83 
87 
83 
86 
| 3.94 
11 
Same as No. 8 mercerized j 
in the piece and fin- j 
ished with same width j 
M.... 
.12 
.21 
42 
.20 
.32 
.63 
80 
81 
\ 3.76 
S.C. 
.25 
.33 
59 
.31 
.40 
.74 
85 
88 
as gray cloth 
12 
Same as No. 11 but 
starched with \ per 
cent corn starch 
M.... 
'S.C. 
.19 
.16 
.31 
.28 
56 
48 
.19 
.25 
- .31 
.38 
.64 
.68 
82 
81 
82 
82 
| 3.82 
13 
Same as No. 8 but in- 
creased 1 inch in width ( 
on tentering frame 
M.... 
S.C. 
.26 
.24 
.42 
.36 
79 
70 
.18 
.23 
.30 
.34 
.62 
.68 
79 
84 
91 
85 
} 4.05 
14 
Same as No. 13 but i 
starched with J per I 
cent corn starch ! 
M.... 
S.C. 
.26 
.43 
.43 
.62 
80 
96 
.19 
.31 
.35 
.45 
.71 
.79 
85 
85 
91 
96 
} 3.98 
23 
3/80's 68 by 68 plain weave 
made from Sea Island 
mercerized yarn, sin- j 
.M.... 
.39 
.56 
88 
.20 
.30 
.56 
78 
89 
} 4.01 
gle twist, 35.6; ply 
S.C. 
.46 
.62 
90 
.28 
.35 
.59 
79 
87 
twist, 20.6 
30 
3/80's 68 by 68 plain weave 
made from high grade 
Sakel; mercerized yarn. 
11.... 
.36 
.50 
78 
.15 
.22 
.43 
86 
90 
} 3.91 
Single twist, 35.6; ply 
S.C. 
.50 
.66 
93 
.21 
.31 
.50 
90 
93 
twist, 20.6 
31 
3/80's 68 by 68 plain weave 
made from lower grade 
Sake 1 ; mercerized yarn. 
M.... 
.37 
.53 
84 
.20 
.28 
.55 
83 
89 
} 4.00 
single twist, 35.6; ply 
S.C. 
.27 
.39 
64 
.19 
.29 
.51 
84 
86 
twist, 20.6 
M=Bureau of Markets; S. C.=Signal Corps. Twist is stated in turns per inch of yarn. 
185339°— Bull. 882—20- — 3 
