|
Table A-2. 8-sided Spar, Round Exterior
|
|
Ratio A
or
I.D./O.D.
|
Ratio (M)
or
(O.D./L)
|
Ratio (K)
or
(H/L)
|
Weight Saving at same size
|
Strengh Loss at same size
|
Outside Waste
|
Size Increase for same strength
|
Weight Saving at same strength
|
Arbitrary Score
|
|
|
|
|
(%)
|
(%)
|
(%)
|
(%)
|
(%)
|
|
| 0.99 |
2.445 |
0.104 |
88.24 |
96.06 |
32.09 |
124.45 |
40.76 |
-83.69 |
| 0.98 |
2.448 |
0.116 |
86.47 |
92.24 |
29.18 |
89.45 |
51.43 |
-38.02 |
| 0.97 |
2.451 |
0.127 |
84.71 |
88.53 |
26.80 |
71.83 |
54.86 |
-16.97 |
| 0.96 |
2.455 |
0.139 |
82.97 |
84.93 |
24.81 |
60.51 |
56.13 |
-4.38 |
| 0.95 |
2.458 |
0.150 |
81.25 |
81.45 |
23.13 |
52.38 |
56.47 |
4.10 |
| 0.94 |
2.462 |
0.162 |
79.55 |
78.07 |
21.70 |
46.14 |
56.33 |
10.19 |
| 0.93 |
2.465 |
0.174 |
77.87 |
74.81 |
20.47 |
41.15 |
55.91 |
14.76 |
| 0.92 |
2.468 |
0.185 |
76.20 |
71.64 |
19.39 |
37.03 |
55.31 |
18.28 |
| 0.91 |
2.472 |
0.197 |
74.56 |
68.57 |
18.45 |
33.56 |
54.61 |
21.05 |
| 0.90 |
2.475 |
0.209 |
72.93 |
65.61 |
17.61 |
30.58 |
53.83 |
23.25 |
| 0.89 |
2.479 |
0.220 |
71.31 |
62.74 |
16.88 |
28.00 |
53.00 |
25.01 |
| 0.88 |
2.482 |
0.232 |
69.72 |
59.97 |
16.22 |
25.72 |
52.14 |
26.42 |
| 0.87 |
2.486 |
0.244 |
68.14 |
57.29 |
15.63 |
23.70 |
51.26 |
27.56 |
| 0.86 |
2.489 |
0.256 |
66.59 |
54.70 |
15.09 |
21.89 |
50.36 |
28.46 |
| 0.85 |
2.493 |
0.268 |
65.05 |
52.20 |
14.61 |
20.27 |
49.45 |
29.18 |
| 0.84 |
2.496 |
0.279 |
63.53 |
49.79 |
14.18 |
18.79 |
48.53 |
29.73 |
| 0.83 |
2.500 |
0.291 |
62.02 |
47.46 |
13.79 |
17.46 |
47.61 |
30.15 |
| 0.82 |
2.503 |
0.303 |
60.54 |
45.21 |
13.43 |
16.23 |
46.69 |
30.45 |
| 0.81 |
2.507 |
0.315 |
59.07 |
43.05 |
13.10 |
15.11 |
45.76 |
30.65 |
| 0.80 |
2.510 |
0.327 |
57.62 |
40.96 |
12.80 |
14.08 |
44.84 |
30.76 |
| 0.79 |
2.514 |
0.340 |
56.19 |
38.95 |
12.53 |
13.13 |
43.93 |
30.80 |
| 0.78 |
2.517 |
0.352 |
54.78 |
37.02 |
12.28 |
12.25 |
43.02 |
30.76 |
| 0.77 |
2.521 |
0.364 |
53.38 |
35.15 |
12.05 |
11.44 |
42.11 |
30.67 |
| 0.76 |
2.524 |
0.376 |
52.00 |
33.36 |
11.84 |
10.68 |
41.20 |
30.52 |
| 0.75 |
2.528 |
0.388 |
50.64 |
31.64 |
11.65 |
9.98 |
40.30 |
30.33 |
| 0.74 |
2.531 |
0.400 |
49.30 |
29.99 |
11.47 |
9.32 |
39.41 |
30.09 |
| 0.73 |
2.535 |
0.413 |
47.98 |
28.40 |
11.31 |
8.71 |
38.52 |
29.81 |
| 0.72 |
2.539 |
0.425 |
46.67 |
26.87 |
11.17 |
8.14 |
37.64 |
29.50 |
| 0.71 |
2.542 |
0.437 |
45.38 |
25.41 |
11.03 |
7.60 |
36.76 |
29.16 |
| 0.70 |
2.546 |
0.450 |
44.12 |
24.01 |
10.91 |
7.11 |
35.89 |
28.79 |
| 0.69 |
2.550 |
0.462 |
42.86 |
22.67 |
10.79 |
6.64 |
35.03 |
28.39 |
| 0.68 |
2.553 |
0.475 |
41.63 |
21.38 |
10.69 |
6.20 |
34.17 |
27.97 |
| 0.67 |
2.557 |
0.487 |
40.42 |
20.15 |
10.60 |
5.79 |
33.32 |
27.53 |
| 0.66 |
2.561 |
0.500 |
39.22 |
18.97 |
10.51 |
5.40 |
32.47 |
27.07 |
| 0.65 |
2.564 |
0.512 |
38.04 |
17.85 |
10.44 |
5.04 |
31.64 |
26.60 |
| 0.64 |
2.568 |
0.525 |
36.88 |
16.78 |
10.37 |
4.70 |
30.81 |
26.11 |
| 0.63 |
2.572 |
0.537 |
35.73 |
15.75 |
10.31 |
4.38 |
29.98 |
25.60 |
| 0.62 |
2.575 |
0.550 |
34.61 |
14.78 |
10.25 |
4.08 |
29.17 |
25.09 |
| 0.61 |
2.579 |
0.563 |
33.50 |
13.85 |
10.21 |
3.80 |
28.36 |
24.56 |
| 0.60 |
2.583 |
0.576 |
32.41 |
12.96 |
10.17 |
3.53 |
27.55 |
24.02 |
| 0.59 |
2.587 |
0.588 |
31.34 |
12.12 |
10.13 |
3.28 |
26.76 |
23.48 |
| 0.58 |
2.590 |
0.601 |
30.29 |
11.32 |
10.10 |
3.05 |
25.97 |
22.92 |
| 0.57 |
2.594 |
0.614 |
29.25 |
10.56 |
10.07 |
2.83 |
25.19 |
22.36 |
| 0.56 |
2.598 |
0.627 |
28.23 |
9.83 |
10.06 |
2.62 |
24.42 |
21.80 |
| 0.55 |
2.602 |
0.640 |
27.23 |
9.15 |
10.04 |
2.43 |
23.66 |
21.23 |
| 0.54 |
2.605 |
0.653 |
26.25 |
8.50 |
10.03 |
2.25 |
22.90 |
20.66 |
| 0.53 |
2.609 |
0.666 |
25.29 |
7.89 |
10.02 |
2.08 |
22.16 |
20.08 |
| 0.52 |
2.613 |
0.679 |
24.34 |
7.31 |
10.02 |
1.92 |
21.42 |
19.50 |
| 0.51 |
2.617 |
0.692 |
23.42 |
6.77 |
10.03 |
1.77 |
20.69 |
18.92 |
| 0.50 |
2.621 |
0.705 |
22.51 |
6.25 |
10.03 |
1.63 |
19.97 |
18.34 |
| 0.49 |
2.625 |
0.718 |
21.62 |
5.76 |
10.04 |
1.50 |
19.25 |
17.76 |
| 0.48 |
2.628 |
0.731 |
20.74 |
5.31 |
10.06 |
1.37 |
18.55 |
17.18 |
| 0.47 |
2.632 |
0.745 |
19.89 |
4.88 |
10.07 |
1.26 |
17.86 |
16.60 |
| 0.46 |
2.636 |
0.758 |
19.05 |
4.48 |
10.10 |
1.15 |
17.18 |
16.02 |
| 0.45 |
2.640 |
0.771 |
18.23 |
4.10 |
10.12 |
1.05 |
16.50 |
15.45 |
| 0.44 |
2.644 |
0.785 |
17.43 |
3.75 |
10.15 |
0.96 |
15.84 |
14.88 |
| 0.43 |
2.648 |
0.798 |
16.65 |
3.42 |
10.18 |
0.87 |
15.18 |
14.31 |
| 0.42 |
2.652 |
0.811 |
15.88 |
3.11 |
10.21 |
0.79 |
14.54 |
13.75 |
| 0.41 |
2.656 |
0.825 |
15.13 |
2.83 |
10.25 |
0.72 |
13.91 |
13.19 |
| 0.40 |
2.660 |
0.838 |
14.41 |
2.56 |
10.29 |
0.65 |
13.29 |
12.64 |
| 0.39 |
2.664 |
0.852 |
13.69 |
2.31 |
10.34 |
0.59 |
12.68 |
12.09 |
| 0.38 |
2.668 |
0.866 |
13.00 |
2.09 |
10.38 |
0.53 |
12.08 |
11.55 |
| 0.37 |
2.672 |
0.879 |
12.33 |
1.87 |
10.43 |
0.47 |
11.49 |
11.02 |
| 0.36 |
2.676 |
0.893 |
11.67 |
1.68 |
10.48 |
0.42 |
10.92 |
10.49 |
| 0.35 |
2.680 |
0.907 |
11.03 |
1.50 |
10.54 |
0.38 |
10.35 |
9.97 |
| 0.34 |
2.684 |
0.920 |
10.41 |
1.34 |
10.59 |
0.34 |
9.80 |
9.47 |
| 0.33 |
2.688 |
0.934 |
9.80 |
1.19 |
10.65 |
0.30 |
9.26 |
8.97 |
| 0.32 |
2.692 |
0.948 |
9.22 |
1.05 |
10.72 |
0.26 |
8.74 |
8.48 |
| 0.31 |
2.696 |
0.962 |
8.65 |
0.92 |
10.78 |
0.23 |
8.23 |
8.00 |
| 0.30 |
2.700 |
0.976 |
8.10 |
0.81 |
10.85 |
0.20 |
7.73 |
7.52 |
| 0.29 |
2.704 |
0.990 |
7.57 |
0.71 |
10.92 |
0.18 |
7.24 |
7.07 |
| 0.28 |
2.708 |
1.004 |
7.06 |
0.61 |
10.99 |
0.15 |
6.77 |
6.62 |
| 0.27 |
2.712 |
1.018 |
6.56 |
0.53 |
11.07 |
0.13 |
6.31 |
6.18 |
| 0.26 |
2.716 |
1.032 |
6.09 |
0.46 |
11.15 |
0.11 |
5.87 |
5.76 |
| 0.25 |
2.721 |
1.046 |
5.63 |
0.39 |
11.23 |
0.10 |
5.44 |
5.34 |
| 0.24 |
2.725 |
1.060 |
5.19 |
0.33 |
11.31 |
0.08 |
5.03 |
4.95 |
| 0.23 |
2.729 |
1.075 |
4.76 |
0.28 |
11.40 |
0.07 |
4.63 |
4.56 |
| 0.22 |
2.733 |
1.089 |
4.36 |
0.23 |
11.49 |
0.06 |
4.25 |
4.19 |
| 0.21 |
2.737 |
1.103 |
3.97 |
0.19 |
11.58 |
0.05 |
3.88 |
3.83 |
| 0.20 |
2.742 |
1.117 |
3.60 |
0.16 |
11.67 |
0.04 |
3.52 |
3.48 |
|