I found the error in my blade load program. It now agrees better with John Lynch
and Vance Jaqua programs. Something was wrong with the dimensions part.
Inches instead of feet or some such.
I started from scratch and rewrote the whole thing.
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
http://home.earthlink.net/~rotaryeng/ http://www.linux.org
DEFSNG A-Z
'centrifugal force = mv^2/r
MaxRadius = 3.05 'in feet
Increment = .05 'in feet .6 inch
NumOfInc = 3.05 / .05
BladeWght = 8 'in pounds
IncWght = BladeWght / NumOfInc 'in pounds
Slugs = IncWght / 32
Pi = 3.1416
RPM = 3000
RPS = RPM / 60 'revs per second
CLS
OPEN "bladload.dat" FOR OUTPUT AS #1
PRINT #1, " Blade weight in pounds"; BladeWght
PRINT #1, "Max radius of Blade in Feet"; MaxRadius
PRINT #1, " Increment"; Increment
PRINT #1, " Number of Increments"; NumOfInc
PRINT #1, "Incremental weight of blade "; IncWght
PRINT #1,
PRINT #1, " radius radian Velocity incremental total"
PRINT #1, " feet per sec feet load load"
PRINT #1, " * radius per sec "
PRINT #1, "------------------------------------------------------------------"
FOR RadiusFt = Increment TO (MaxRadius + .3) STEP Increment
num = num + 1
PRINT #1, USING "##"; num;
PRINT #1, USING "###.##"; RadiusFt;
RadPerSec = 2 * Pi * RPS
PRINT #1, USING "##########.###"; RadPerSec * RadiusFt;
Circum = 2 * RadiusFt * Pi 'in feet
VelFtSec = Circum * RPS
PRINT #1, USING "##########.###"; VelFtSec;
IncLoad = Slugs * (VelFtSec) ^ 2 / RadiusFt
PRINT #1, USING "##########.###"; IncLoad;
TotLoad = TotLoad + IncLoad
PRINT #1, USING "############.##"; TotLoad
NEXT RadiusFt
SHELL "more < bladload.dat "
Blade weight in pounds 8
Max radius of Blade in Feet 3.05
Increment .05
Number of Increments 61
Incremental weight of blade .1311475
radius radian Velocity incremental total
feet per sec feet load load
* radius per sec
------------------------------------------------------------------
1 0.05 15.708 15.708 20.225 20.22
2 0.10 31.416 31.416 40.449 60.67
3 0.15 47.124 47.124 60.674 121.35
4 0.20 62.832 62.832 80.899 202.25
5 0.25 78.540 78.540 101.123 303.37
6 0.30 94.248 94.248 121.348 424.72
7 0.35 109.956 109.956 141.573 566.29
8 0.40 125.664 125.664 161.798 728.09
9 0.45 141.372 141.372 182.022 910.11
10 0.50 157.080 157.080 202.247 1112.36
11 0.55 172.788 172.788 222.472 1334.83
12 0.60 188.496 188.496 242.696 1577.53
13 0.65 204.204 204.204 262.921 1840.45
14 0.70 219.912 219.912 283.146 2123.59
15 0.75 235.620 235.620 303.370 2426.96
16 0.80 251.328 251.328 323.595 2750.56
17 0.85 267.036 267.036 343.820 3094.38
18 0.90 282.744 282.744 364.045 3458.42
19 0.95 298.452 298.452 384.269 3842.69
20 1.00 314.160 314.160 404.494 4247.19
21 1.05 329.868 329.868 424.719 4671.90
22 1.10 345.576 345.576 444.943 5116.85
23 1.15 361.284 361.284 465.168 5582.02
24 1.20 376.992 376.992 485.393 6067.41
25 1.25 392.700 392.700 505.617 6573.03
26 1.30 408.408 408.408 525.842 7098.87
27 1.35 424.116 424.116 546.067 7644.93
28 1.40 439.824 439.824 566.291 8211.23
29 1.45 455.532 455.532 586.516 8797.74
30 1.50 471.240 471.240 606.741 9404.48
31 1.55 486.948 486.948 626.965 10031.45
32 1.60 502.656 502.656 647.190 10678.64
33 1.65 518.364 518.364 667.415 11346.05
34 1.70 534.072 534.072 687.639 12033.69
35 1.75 549.780 549.780 707.864 12741.56
36 1.80 565.488 565.488 728.089 13469.64
37 1.85 581.196 581.196 748.313 14217.96
38 1.90 596.904 596.904 768.538 14986.50
39 1.95 612.612 612.612 788.763 15775.26
40 2.00 628.320 628.320 808.987 16584.25
41 2.05 644.028 644.028 829.212 17413.46
42 2.10 659.736 659.736 849.437 18262.90
43 2.15 675.444 675.444 869.661 19132.56
44 2.20 691.152 691.152 889.886 20022.45
45 2.25 706.860 706.860 910.111 20932.56
46 2.30 722.568 722.568 930.335 21862.89
47 2.35 738.276 738.276 950.560 22813.45
48 2.40 753.984 753.984 970.785 23784.24
49 2.45 769.692 769.692 991.009 24775.25
50 2.50 785.400 785.400 1011.234 25786.48
51 2.55 801.108 801.108 1031.459 26817.94
52 2.60 816.816 816.816 1051.683 27869.63
53 2.65 832.524 832.524 1071.908 28941.53
54 2.70 848.232 848.232 1092.133 30033.67
55 2.75 863.940 863.939 1112.357 31146.02
56 2.80 879.648 879.648 1132.582 32278.61
57 2.85 895.356 895.356 1152.807 33431.41
58 2.90 911.064 911.063 1173.031 34604.45
59 2.95 926.771 926.771 1193.256 35797.70
60 3.00 942.479 942.479 1213.481 37011.18
61 3.05 958.188 958.187 1233.705 38244.89
62 3.10 973.895 973.895 1253.930 39498.82
63 3.15 989.603 989.603 1274.155 40772.98
64 3.20 1005.311 1005.311 1294.380 42067.36
65 3.25 1021.019 1021.019 1314.604 43381.96
66 3.30 1036.727 1036.727 1334.829 44716.79
67 3.35 1052.435 1052.435 1355.053 46071.84