arla-lt2.htm
If a combustor is used as the launch tube gas generator one way of controlling the flame is to use a screen. When both the fuel and oxidizer are gasses they can be blown into a mixing chamber which has a screen a little ways downstream. If built right, the mixture can be ignited downstream of the screen without the flame getting near the injectors.
=========================================Properties of some tubes I've found
Material Diameter Pressure Cost Notes Used in psi per ft Rain for Rent Aluminum 12 180 $16 Irrigation Pipe, (1) 10 190 8 225 8 (2) 6 300 4 400 3 500 (1) May be rented for the first month at $2.02/ft. Each additional month for $1.01/ft. (Rain for Rent) (2) May be rented for the first month at $0.90/ft. Each additional month for $0.45/ft. (Rain for Rent) Prices includes Victaulic couplings. Denver International Steel and Pipe Supply Co http://www.disps.com/pipe5.htm Stainless 24 OD x 0.500 wall - $31.50/ft Steel 8 OD x 0.105 wall - 4.25 6 OD x 0.134 wall - 3.95 8 5/8 x 0.172 used- 1.95 36 OD x 0.625 wall - 59.95 Coated Aluminum 4 1/2 x 0.500 - 15.50 Drill Pipe Desert Industrial Supply ABS 8 8.03 Steel 8 3,200 10.66 Regular 8 16.25 Seamless Butterfly Valve, 8 in 350 guess Endura Steel Steel 8 (0.134 wall) $9.45 Guage Pipe 8 18.50 Seamless .134 wall Other Valves 12 $1,000-1,400 8 800-1,000=========================================
Thermoplastic Parts, Specs, and Costs PVC - Schedule 40 TUBES (Pipes) Dia OD ID Wall Pressure Threaded Collapse Cost in in in in psi psi psi $/ft 1 1.315 1.033 0.133 450 2 2.375 2.049 0.154 280 0.45 3 3.500 3.042 0.216 260 4 4.500 3.998 0.237 220 6 6.625 6.021 0.280 180 8 8.625 7.943 0.322 160 10 10.750 9.976 0.365 140 12 12.750 11.890 0.406 130 24 24.000 22.544 0.687 120 36 Note: Different MFGs have the same ODs and pressure ratings but can vary IDs and wall thicknesses to account for variations in materials. 1 in. Inline Splice $ 0.76 1 in. T 1.39 1 in. End Cap 0.89 2 in. Ball Valve 12.99 2 in. Union 7.99 2 in. Elbow 1.29 2 in. T 1.39 2 in. Male Adaptor 1.29 PVC - Schedule 80 Dia OD ID Wall Pressure Threaded Collapse Cost/ft in in in in psi psi psi $ 1 1.315 0.840 0.147 630 320 540 2 2.375 1.881 0.218 400 200 190 3 3.500 2.820 0.300 370 190 155 4 4.500 3.737 0.337 320 160 115 6 6.625 5.646 0.432 280 NR 80 8 8.625 7.490 0.500 250 10 10.750 9.407 0.593 230 12 12.750 11.197 0.687 230 24 24.000 21.418 1.218 210 36 NR = Not Recommended PVC - Schedule 120 Dia OD ID Wall Pressure Threaded Collapse Cost/ft in in in in psi psi psi $ 1 1.315 0.891 0.200 720 2 2.375 1.845 0.250 470 3 3.500 2.758 0.350 440 4 4.500 3.572 0.437 430 6 6.625 5.434 0.562 370 8 10 12 24 36 ABS - Schedule 40 Dia OD ID Wall Pressure Threaded Collapse Cost in in in in psi psi psi $/ft 1 2 0.56 3 1.01 4 1.65 6 8 10 12 24 36 3 in. Female Adaptor $2.79 3 in. Plug 3.19 4 in. Female Adaptor 3.99 4 in. Plug 2.30 4 in. Elbow, 90 deg 4.99 4 in. Elbow, Long 8.99 ABS - Schedule 80 Dia OD ID Wall Pressure Threaded Collapse Cost in in in in psi psi psi $/ft 1 2 3 4 6 8 10 12 24 36 ABS - Schedule 120 Dia OD ID Wall Pressure Threaded Collapse Cost in in in in psi psi psi $/ft 1 2 3 4 6 8 10 12 24 36 TEMPERATURE DERATING for PVC F Factor 73 1.00 80 0.88 90 0.75 100 0.62 110 0.50 120 0.40 130 0.30 140 0.22 150 Not Recommended THREADED FITTING DERATING FOR PVC Derate by 0.50 VALVES PVC Ball Valves, 2-4 in. Pressure Rated for Continuous Use at 150 psi Matco B3 8 in valve $260-280 OTHER NOTES Water Tank Max working pressure = 150 psi Proof tested = 300 psi 2 in. Steel, Galvanized Nipple, 4 in. $ 2.29 Double Wall Vent, Galvanized, 24 in. 10 4 in. outside, 3 in. inside Pumice Block, 3.25 x 3.25 x 8 in. $ 5.79 Synthetic 4 x 4 x 8 in. 1.97
This Page Last Updated 13 Dec 98