普惠发动机产品图集Pratt & Whitney Engine Products Atlas
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<P>Contact: Patrick Louden<BR>Tel: (561) 796-6793<BR>Web Site: www.pw.utc.com<BR>Pratt & Whitney Space Propulsion - Booster Separation Motors (BSMs)<BR>Booster separation motors (BSMs) are vital for NASA’s Space Shuttle launches.<BR>Approximately two minutes into flight, 16 of these small but powerful motors (4 each<BR>mounted on the aft and forward sections of the two solid motor boosters) execute split<BR>second timing to provide the precise thrust required for safe separation of the spent<BR>boosters away from the main fuel tank and the orbiter. During more than 100 space<BR>shuttle missions, every one of the more than 1,700 BSMs has performed flawlessly.<BR>P&W has been the sole supplier to the Shuttle program since its inception in the late<BR>1970s, first directly to NASA in the early 1980s and then to the NASA subcontractors<BR>USBI (up to late 1999) and United Space Alliance (USA), which is the current<BR>subcontractor.<BR>Characteristics (100% power)<BR>Average thrust : 18,500 lb<BR>Length: 31 in.<BR>Diameter: 13 in.<BR>Loaded weight: 167 lb<BR>Action Time: 0.805 sec<BR>Total impulse: 14,000 lb sec</P>
CECE
COBRA
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<P>Contact: Patrick Louden<BR>Tel: (561) 796-6793<BR>Web Site: www.pw.utc.com<BR>Pratt & Whitney Space Propulsion - COBRA<BR>Pratt & Whitney and Aerojet have teamed to provide the widest range of main propulsion<BR>options in support of second generation, reusable launch vehicles (2GRLV). Pratt &<BR>Whitney’s strengths in reusable rocket turbo-machinery and health and maintenance<BR>management systems used for jet engines complement Aerojet’s strengths in combustion<BR>devices and the integration and production of large propulsion systems such as those used<BR>for Titan.<BR>Propulsion systems offered by Pratt & Whitney-Aerojet Propulsion Associates cover a<BR>wide range of thrust, for both hydrogen and hydrocarbon propellants, allowing the<BR>greatest flexibility for vehicle customers and NASA to select and execute optimum<BR>2GRLV architecture.<BR>One of these propulsion systems is the COBRA, a long-life, moderate-to high-thrust,<BR>reusable booster engine that incorporates a safe, low-cost, low-risk, LH2/LOX single<BR>burner, fuel-rich, staged combustion cycle. Mature, flight proven Space Shuttle Main<BR>Engine alternate turbopumps reduce technical, schedule, and programmatic risk while at<BR>the same time meet safety and reliability goals.<BR>Description<BR>􀂃 Single pre-burner, fuel-rich staged combustion cycle<BR>􀂃 Double containment, failsafe powerhead, hot gas system<BR>􀂃 Incorporates flight-certified SSME Block II turbopumps<BR>􀂃 Long-life, robust, milled-channel nozzle construction eliminates hot side weld<BR>joints<BR>􀂃 Smooth start transients avoid life-limiting thermal stress<BR>􀂃 Blanch-shielded, formed-platelet liner technology reduces hotwall stress<BR>􀂃 Turbine inlet temperature reduced 500°F relative to the SSME, promotes longer<BR>life<BR>􀂃 Integrated engine controls and health management system enhance safety and<BR>maintainability<BR>􀂃 Low development cost/risk based on use of flight-qualified hardware and mature<BR>technologies<BR>Characteristics<BR>Thrust (vac): 200,000-1,000,000 lbf<BR>Dry Weight (at 600k thrust): 8,000 lbm<BR>Specific impulse (vac): 455 sec<BR>Cycle: Staged combustion<BR>Propellants: Liquid hydrogen / liquid oxygen<BR>Mixture ratio: 5.5:1 to 6.5:1<BR>Shutdown reliability: 0.9995<BR>Catastrophic reliability: 0.999995<BR>Mission life: > 100 missions<BR>Time between overhauls: > 50 missions<BR>Scheduled maintenance per flight: < 100 man-hours<BR>Turnaround between flights: < 16 hours</P> 原来普惠什么发动机都做啊 :lol 长见识了 <P>好资源，必须顶起来！！</P> 楼主辛苦，学习了~~ 这个东西电子的不多，谢谢 看看先，谢谢楼主啦 很好很强大，