98mm 75 in motor data 0.0-580 0.5-580 2.4-700 5.0-880 6.4-620 7.6-260 8.7-120 9.5-0 31# TOTAL IMPULSE POUND-SECONDS = 5395 TOTAL IMPULSE NEWTON-SECONDS = 23996.96 AVERAGE THRUST NEWTONS = 2525.995789 AVERAGE THRUST POUNDS = 567.894737 SPECIFIC IMPULSE (LB-SEC/LB) = 174.032258 1.450 1.560 46.25 1.505 ave 218.6 sqin 1.775 25.75 1.668 ave 134.9 sqin 72.00 353.5 squn Motor Design Program Include end grain? Y=1 N=0 0 Grain OD inches = 3.25 Core Dia inches = 1.55 Total Grain(s) Length = 72 Number of grain segments = 1 Target KN = 225 Area inches ^2 = 363.40872 Area inches ^2 = 353.5 THROAT= 80.00/64 Kn = 288.07 THROAT= 81.00/64 Kn = 281.00 THROAT= 82.00/64 Kn = 274.19 THROAT= 83.00/64 Kn = 267.62 THROAT= 84.00/64 Kn = 261.28 THROAT= 85.00/64 Kn = 255.17 THROAT= 86.00/64 Kn = 249.27 ** 1.34 THROAT= 87.00/64 Kn = 243.58 THROAT= 88.00/64 Kn = 238.07 THROAT= 89.00/64 Kn = 232.75 THROAT= 90.00/64 Kn = 227.61 THROAT= 91.00/64 Kn = 222.63 ** 1.42 THROAT= 92.00/64 Kn = 217.82 THROAT= 93.00/64 Kn = 213.16 THROAT= 94.00/64 Kn = 208.65 THROAT= 95.00/64 Kn = 204.28 THROAT= 96.00/64 Kn = 200.05 ** 1.50 Test2 flight THROAT= 97.00/64 Kn = 195.94 THROAT= 98.00/64 Kn = 191.96 THROAT= 99.00/64 Kn = 188.11 THROAT= 100.00/64 Kn = 184.36 THROAT= 101.00/64 Kn = 180.73 THROAT= 102.00/64 Kn = 177.20 THROAT= 103.00/64 Kn = 173.78 THROAT= 104.00/64 Kn = 170.45 THROAT= 105.00/64 Kn = 167.22 THROAT= 106.00/64 Kn = 164.08 THROAT= 107.00/64 Kn = 161.03 THROAT= 108.00/64 Kn = 158.06 THROAT= 109.00/64 Kn = 155.17 THROAT= 110.00/64 Kn = 152.37 THROAT= 111.00/64 Kn = 149.63 THROAT= 112.00/64 Kn = 146.97 THROAT= 113.00/64 Kn = 144.38 THROAT= 114.00/64 Kn = 141.86 THROAT= 115.00/64 Kn = 139.40 THROAT= 116.00/64 Kn = 137.01 THROAT= 117.00/64 Kn = 134.68 THROAT= 118.00/64 Kn = 132.41 as tested * THROAT= 119.00/64 Kn = 130.19 THROAT= 120.00/64 Kn = 128.03 * file:///Macintosh%20HD/-organized/v-serv.com/theproject/8.5KS680.htm Igniter grain 1x2x3/8c 11/64T Motor Design Program Copyright 1988 Jerry Irvine Copyright 1987 U.S. Rockets KNe.bas ** When in doubt, type zero. ** Select Grain Geometry: Core=1,Moon=2,Slice=3,C=4,swipe=5,endburner=6 Multi-C=7, Multi-slice=8, Multi-core=9, Quit=99: 1 Include end grain? Y=1 N=0 0 Grain OD inches = 1.25 Core Dia inches = .375 Total Grain(s) Length = 2 Number of grain segments = 1 Target KN = 225 Area inches ^2 = 4.589535 If you wish to modify area, enter new value: 0=no 0 Throat Diameter = 10.314176 /64 At Kn=100 throat= 15.471264 /64 At Kn=150 throat= 12.632234 /64 At Kn=200 throat= 10.939835 /64 At Kn=300 throat= 8.932338 /64 Area inches ^2 = 4.589535 Kn for a specific throat=1, Range of throats by 64ths=2 None=0 10 degree 4x105" 55# 420 planform 0 lift 0.65 cd 80 deg 29 inhg Chipmunk BASIC v3.5.0 >run "trajec01.chip" Program name TRAJEC01.BAS ENTER NAME OF ROCKET (50 OR LESS LETTERS) 4 TIME INCREMENT FOR RUNGE-KUTTA CALCULATIONS (SEC) .1 PRINT OUT EACH ITERATION? (YES=1 N0=2) 2 ENTER WEIGHT OF ROCKET VEHICLE (LBS) 55 REPRESENTATIVE SUBSONIC CD, CDr AT R 10^6 AND 10^7 .65 ENTER MAXIMUM DIAMETER OF ROCKET (INCHES) 4 ENTER LENGTH OF ROCKET (INCHES) 105 ENTER COEFFICIENT OF LIFT OF ROCKET 0 ENTER PLANFORM AREA OF ROCKET (IN^2) 420 RENTRY VEHICLE WILL SEPARATE AT APPOGEE ENTER RENTRY VEHICLE WEIGHT (LBS) 25 REPRESENTATIVE SUBSONIC CD, (CDr) OF RENTRY VEHICLE .65 ENTER MAX DIAMETER OF RENTRY VEHICLE (INCHES) 4 ENTER LENGTH OF RENTRY VEHICLE (INCHES) 105 COEFFICIENT OF LIFT OF RENTRY VEHICLE 0 ENTER PLANFORM AREA OF RENTRY VEHICLE (IN^2) 420 MAX BURN TIME IS INCREMENT TIMES 2000 ENTER ROCKET ENGINE BURN TIME (SEC) 9.5 ENTER ROCKET ENGINE PROPELLANT WEIGHT (LBS) 31 ENTER TEMPERATURE OF AIR AT LAUNCH SITE (DEG F) 80 ENTER AIR PRESSURE AT LAUNCH SITE (IN-HG) 29 SPEED OF SOUND AT LAUNCH SITE (FT/SEC)= 1138.822251 ENTER CRITICAL ENDPOINTS OF ROCKET ENGINE THRUST CURVE IN TIME INCREMENTS OF NO LESS THAN 0.1 SEC (ROCKET ENGINE BURN TIME LIMITS ARE DT=0.01 20 SEC DT=0.10 200 SEC) AT TIME=0.0 SEC THRUST=0.0 LBS AT TIME=BURN TIME THRUST=0.0 LBS ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 0 ENTER THRUST (LBS)= 580 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= .5 ENTER THRUST (LBS)= 580 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 2.4 ENTER THRUST (LBS)= 700 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 5 ENTER THRUST (LBS)= 880 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 6.4 ENTER THRUST (LBS)= 620 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 7.6 ENTER THRUST (LBS)= 260 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 8.7 ENTER THRUST (LBS)= 120 ENTER NEXT ENDPOINT; ENTER TIME (SEC)= 9.5 ENTER THRUST (LBS)= 0 VERIFY THE THRUST CURVE? (YES=1 NO=2) 2 ROCKET STARTING ON A LAUNCHER (1) OR IN THE AIR (2)? 1 ENTER LAUNCHER LENGTH (FT) 12 ENTER LAUNCH ANGLE FROM VERTICAL (DEG) 10 ROCKET NAME= 4 TIME THRUST CD VEL REL V VERTICAL V HORIZ. ALT RANGE (SEC) (LBS) (FT/SEC) (FT/SEC) (FT/SEC) (FT) (FT) ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- 0.00 0.00 INFINITE 0.00 0.00 0.00 0.00 0.00 0.50 580.00 0.63 156.84 153.63 31.58 38.26 7.61 1.00 611.58 0.62 324.02 316.40 69.85 155.25 32.75 1.50 643.16 0.62 504.97 492.14 113.13 356.87 78.31 2.00 674.74 0.62 699.16 680.42 160.79 649.52 146.63 2.50 706.92 0.62 905.79 880.53 212.42 1039.29 239.78 3.00 741.54 0.88 1122.22 1089.93 267.26 1531.84 359.65 3.50 776.15 1.01 1332.67 1293.33 321.44 2127.62 506.79 4.00 810.77 0.95 1548.78 1502.04 377.62 2826.20 681.46 4.50 845.38 0.89 1771.78 1717.29 436.05 3630.77 884.79 5.00 880.00 0.84 2002.17 1939.55 496.82 4544.68 1117.91 5.50 787.14 0.79 2209.20 2139.06 552.23 5566.04 1380.59 6.00 694.29 0.75 2373.11 2296.73 597.22 6676.63 1668.37 6.50 590.00 0.73 2494.21 2412.90 631.69 7855.84 1976.06 7.00 440.00 0.72 2554.03 2469.72 650.80 9079.11 2297.36 7.50 290.00 0.72 2546.12 2461.04 652.71 10314.44 2623.93 8.00 209.09 0.72 2487.90 2403.72 641.70 11531.53 2947.78 8.50 145.45 0.74 2405.62 2323.17 624.40 12714.21 3264.56 9.00 75.00 0.76 2275.50 2196.47 594.51 13848.31 3570.43 9.50 0.00 0.80 2084.75 2011.29 548.53 14901.39 3856.51 11.50 0.00 0.95 1480.77 1424.69 403.66 18282.82 4794.49 13.50 0.00 1.05 1117.27 1070.59 319.56 20751.98 5510.85 15.50 0.00 0.62 918.22 874.77 279.12 22673.97 6102.80 17.50 0.00 0.62 785.83 742.76 256.58 24287.28 6637.40 19.50 0.00 0.62 675.54 631.64 239.55 25658.86 7132.78 21.50 0.00 0.62 580.67 534.73 226.38 26823.27 7598.17 23.50 0.00 0.62 497.20 447.82 216.03 27804.42 8040.16 25.50 0.00 0.62 422.72 368.11 207.82 28619.34 8463.70 27.50 0.00 0.62 355.99 293.63 201.29 29280.33 8872.57 29.50 0.00 0.62 296.89 222.94 196.07 29796.36 9269.73 31.50 0.00 0.62 246.66 154.97 191.90 30173.90 9657.55 33.50 0.00 0.62 208.43 88.91 188.52 30417.52 10037.85 35.50 0.00 0.63 187.21 24.15 185.65 30530.41 10411.96 37.50 0.00 0.63 -187.28 -39.62 183.04 30514.79 10780.61 39.50 0.00 0.62 -207.43 -102.45 180.36 30372.55 11144.05 41.50 0.00 0.62 -241.59 -164.06 177.34 30105.81 11501.82 43.50 0.00 0.62 -283.57 -224.05 173.82 29717.39 11853.07 45.50 0.00 0.62 -329.07 -281.91 169.75 29211.04 12196.74 47.50 0.00 0.62 -375.41 -337.17 165.09 28591.49 12531.68 49.50 0.00 0.62 -420.88 -389.34 159.86 27864.43 12856.72 51.50 0.00 0.62 -464.33 -438.02 154.09 27036.46 13170.75 53.50 0.00 0.62 -504.93 -482.80 147.83 26114.96 13472.75 55.50 0.00 0.62 -542.10 -523.40 141.14 25108.04 13761.78 57.50 0.00 0.62 -575.42 -559.58 134.10 24024.31 14037.07 59.50 0.00 0.62 -604.63 -591.19 126.78 22872.77 14297.99 61.50 0.00 0.62 -629.58 -618.18 119.27 21662.64 14544.06 63.50 0.00 0.62 -650.25 -640.59 111.65 20403.12 14774.99 65.50 0.00 0.62 -666.71 -658.55 104.02 19103.25 14990.66 67.50 0.00 0.62 -679.15 -672.26 96.46 17771.76 15191.13 69.50 0.00 0.62 -687.80 -682.01 89.04 16416.85 15376.60 71.50 0.00 0.62 -692.98 -688.13 81.83 15046.13 15547.42 73.50 0.00 0.62 -695.02 -690.98 74.88 13666.52 15704.08 75.50 0.00 0.62 -704.20 -700.78 69.26 12277.65 15847.83 77.50 0.00 0.62 -714.46 -711.57 64.23 10864.55 15981.32 79.50 0.00 0.62 -720.52 -718.08 59.27 9434.23 16104.79 81.50 0.00 0.62 -722.86 -720.81 54.42 7994.76 16218.46 83.50 0.00 0.62 -722.00 -720.29 49.76 6553.18 16322.61 85.50 0.00 0.62 -718.49 -717.06 45.31 5115.42 16417.64 87.50 0.00 0.62 -712.83 -711.64 41.11 3686.40 16504.03 89.50 0.00 0.62 -705.49 -704.51 37.18 2269.99 16582.27 91.50 0.00 0.62 -696.91 -696.10 33.52 869.19 16652.93 trajec01.bas Copyright 1983-2001 Jerry Irvine END OF PROGRAM RUN. GET HIGH. AND FAST.