Journal Articles
1. Christensen, K.L.,“Equation for the Additive Drag Coefficient at Static Conditions”, AIAA Journal of Propulsion and Power, Vol. 18, No. 1, 2002, pp. 211-213.
2. Christensen, K.L.,"Comparison of Methods for Calculating Turbine Work in the ATR Including Effects on Specific Impulse", AIAA Journal of Propulsion and Power, Vol. 17, No. 2, 2001, pp.256-261.
3. Christensen, K.L.,"ATR/Vehicle Performance Comparison", AIAA Journal of Propulsion and Power, Vol. 15, No. 5, 1999, pp.706-712.
Conference Papers
1. Thomas, M., Herdy, R., Troy, J., Christensen, K.L., and Cohn, R., "Air-Turbo-Rocket Propulsion for Small Launch Vehicle Operations", presented at the 54th Joint Army-Navy-NASA-Air Force (JANNAF) Propulsion Meeting, Denver, Colorado, 14-17 May, 2007. [Distribution limited to U.S. Government agencies. Other requests for this document shall be referred to TBD.]
2. Christensen, K.L.,"ATR Specific Impulse vs Fuel/Air Ratio: Theoretical and Data Comparison" (invited paper), presented at the 1998 JANNAF Propulsion Meeting in Cleveland, Ohio July 15-17, 1998.
3. Christensen, K.L., "ATR/Vehicle Integration', ICAS Paper No. ICAS-96-2.8.2 presented at and published in the Proceedings of the 20th Congress of the International Council of the Aeronautical Sciences held in Sorrento, Italy, 8-13 September 1996.
4. Christensen, K.L., "Comparison of Solid Rocket Motor, Turbojet and Air TurboRamjet Propulsion Systems for Volume Limited Vehicle Applications', published in Proceedings of the Missouri Space Grant Consortium Fifth Annual Meeting held in St. Louis, Missouri 19-20 April, 1996.
5. Christensen, K.L., "Vehicle Performance Optimization Utilizing the Air TurboRamjet (ATR) Propulsion System; Methodology Development and Applications: A Status Report', published in Proceedings of the Missouri Space Grant Consortium Fourth Annual Meeting held in Springfield, Missouri, 21-22 April 1995.
6. Thomas, M.E. and Christensen, K.L., "Air-Turbo-Ramjet Propulsion for Tactical Missiles', AIAA Paper No. AIAA-94-2719 presented at the 30th AIAA/ASME/SAE/ASEE Joint Propulsion Conference held in Indianapolis, Indiana, 27-29 June 1994.
7. Christensen, K.L., Pengelly, Stan L, Lilley, Jay S., "Design of a 250 lbf Thrust Hydrazine Fueled Air TurboRamjet', PRR-SA-MICOM, 10 September 1990, presented at JANNAF Propulsion Meeting 1990. [Distribution limited; requests for this document must be referred to USAMICOM, AMSMI-RD-PR-E, Redstone Arsenal, Alabama 35898.]
8. Christensen, K.L., "ATR Preliminary Design', PRA-SA-MICOM #795 15 May 1990, AIAA Paper No. AIAA-90-2515 not presented at AIAA/ASME/SAE/ASEE 26th Joint Propulsion Conference held in Orlando, Florida, 16-18 July 1990.
9. Bossard, J.A., Christensen, K.L. and Poth, G.E., "ATR Propulsion System Design and Vehicle Integration", AIAA Paper No. AIAA-88-3071 presented at the 24th AIAA/ASME/SAE/ASEE Joint Propulsion Conference held in Boston, Massachusetts, 11-14 July 1988
10. Fedun, M.H., and Christensen, K.L., "Solid Fuel Gas Generator ATR Testing at Aerojet: Latest Results", presented at 24th AIAA/SAE/ASME/ASEE Joint Propulsion Conference held in Boston, Masachusetts, 11-14 July 1988.
11. Bossard, J.A., Christensen, K.L., Fedun, M.H., "Return of the Solid Fuel Gas Generator ATR", PRA-SA-ASD/WPAFB 22 June 1987, AIAA Paper No. AIAA-87-1997, presented at 23rd AIAA/SAE/ASME Joint Propulsion Conference, San Diego, California, June 29 - July 2, 1987.
12. Calvo, W.C., Christensen, K.L. and Fedun, M.H., "Solid Fuel Gas Generator ATR Test Program, Predictions and Results", AIAA Paper No. AIAA-86-1682 presented at the 22nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference held in Huntsville, Alabama, 16-18 June 1986.
13. Andrus, S. R., and Christensen, K.L., "ATR Propulsion System Sizing and Performance for Standoff Missile Applications", presented at JANNAF Propulsion Meeting, 1985. [Distribution limited to U.S. Government agencies. Other requests for this document shall be referred to AFWAL/POR, Wright-Patterson AFB, Ohio 45433-6563.]
14. Christensen, Kirk L., Kelly, M. S., and Sacane, L. J., "Peacekeeper Stage IV Propulsion System", presented at 19th AIAA/SAE/ASME Joint Propulsion Conference held in Seattle, Washington 27-29 June 1983.
15. Christensen, Kirk L., and Mellish, J. A., "Liquid Rocket Engine Tecnology for Orbit Transfer Vehicles", presented at 17th AIAA/SAE/ASME Joint Propulsion Conference held in Colorado Springs, Colorado 27-29 July, 1981.
16. Christensen, Kirk L., and Kent, Stan, "Advanced Rocket Engines for Earth to Orbit Transportation", presented at 1980 AIAA National Meeting held in Baltimore, Maryland 5-11 May, 1980.
17. Christensen, Kirk L., "The Mixed Mode Principle and Advanced Chemical Rocket Engine Concepts", published in Conference Proceedings and presented at AAS Conference held in San Francisco, California, 20-21 July 1979.
Dissertation/Reports
1. Christensen, K.L.,"Vehicle Performance Optimization Utilizing the Air TurboRamjet (ATR) Propulsion System; Methodology Development and Applications", Ph.D. Dissertation, 1997.
2. Thomas, Matthew E., and Christensen, K.L., "Tactical Missile Air-Turbo-Rocket Propulsion System", CFD Research Corporation Final Report, CFDRC Report No. 4295/1 for U.S. Army Missile Command, Redstone Arsenal, Alabama, Contract DAAH01-93-C-R095, September 1993.
3. Christensen, Kirk L., "AirTurboRamjet (ATR) Study, Aerojet Final Report (2 Volumes)", Report No. AFAPL-TR-85-2096, Contract F33615-84-C-2482, for Aeropropulsion Lab at Wright-Patterson AFB, Dayton, Ohio, January 1986.
4. Thomas, M.E., and Christensen, K.L., "Analysis of Air Turbo Rocket Propulsion for Use in USAF Tactical Missiles, Final Report", WL-TR-94-2088, July 1994. [Distribution authorized to DoD components only; other requests for this document shall be referred to WL/POPR WPAFB Ohio 45433-7650.]
5. Christensen, Kirk L., "High Performance Spaceplane Study Program, Aerojet Final Report", Contract C-10486 for SRI International, Menlo Park, California, 2 July 1982.
Magazine Articles
1. Christensen, Kirk L., Writing Easy to Use Programs for Computers, presented at 1983 National Design Engineering Conference held in Chicago, Illinois 28-31 March 1983.
Published in September 1983 issue of Mechanical Engineering (ASME)
Published in March 1984 issue of Design Engineering (UK publication)
2. Christensen, Kirk L., Writing Easy to Use Programs for Computers, Machine Design, 26 August 1982.