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Rocket Propulsion Fundamentals and Examples

Explore the basics of rocket propulsion and learn about various propulsion systems and their performance metrics. Topics include laser propulsion, solar sails, Alka Seltzer rockets, and more. Dr. Andrew Ketsdever from UCCS provides insights into thermodynamics in launch vehicle analysis.

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Rocket Propulsion Fundamentals and Examples

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  1. MAE 5495: Launch Vehicle AnalysisLesson 4: Introduction to Thermodynamics Dr. Andrew Ketsdever UCCS

  2. Rockets of the Day • Laser Propulsion • Laser Pointer: 5 mW, Spot size 3-4 mm diameter • For normal incidence and r = 1 F = 33 picoNewtons Isp = ∞ (almost) • Solar Sail: P = 1358 W/m2; F/A = 9 microNewtons / m2 • Saturn V First Stage, F = 6.7 megaNewtons, Isp = 295 s

  3. Rockets of the Day • Alka Seltzer Rocket • NaHCO3 + H2O  CO2 + H2O + OH + Na (eventually) • Mprop = 0.01 kg • Vburnout = Vcrash = 0.5 g (TOF)2 = 5 m/sec • Itot = ∆p = mempty Vcrash = 0.05 kg x 5 m/s = 0.25 N-sec • F = I / tburn = 0.25 N-sec / 0.1 sec = 2.5 N • Isp = I / (Mprop go) = 2.5 sec • Shuttle Main Engines: F = 1.7 MegaNewtons, Isp = 450 sec

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