www.grc.nasa.gov

Score	Article	Date	Citations
2.9	Isentropic Flow Equations https://www.grc.nasa.gov/www/BGH/isentrop.html	N/A	1
2.9	Turboprop Thrust https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/turbprp.html	N/A	1
2.9	Brief History of Rockets https://www.grc.nasa.gov/www/k-12/TRC/Rockets/history_of_rockets.html	N/A	1
2.9	Engines https://www.grc.nasa.gov/www/k-12/UEET/StudentSite/engines.html	N/A	1
2.9	What is Thrust? https://www.grc.nasa.gov/www/k-12/VirtualAero/BottleRocket/airplane/thrust1.html	N/A	1
2.9	Rocket History – 13th Through 16th Centuries https://www.grc.nasa.gov/WWW/K-12/rocket/BottleRocket/13thru16.htm	N/A	1
2.9	Gas Turbine Core Engine https://www.grc.nasa.gov/www/k-12/airplane/Animation/turbtyp/etcs.html	N/A	1
2.9	Types of Gas Turbines https://www.grc.nasa.gov/www/k-12/airplane/trbtyp.html	N/A	1
2.9	Turbine Engine Thermodynamic Cycle - Brayton Cycle https://www.grc.nasa.gov/www/k-12/airplane/brayton.html	N/A	1