(a.k.a. Jet Engine Launch Assist Concept (JELAC))
Preliminary Concept Study of Pogo, a Reusable First Stage for Spacelift Using Aircraft Jet Engines and Vertical Take-off and Landing
AbstractThis report describes the results of a preliminary concept study into using aircraft jet engines for the propulsion of a spacelift first stage, dubbed a Pogo. It compares relevant altitude, velocity, and lift capabilities of current aircraft and jet engines. It estimates the capabilities of such a first stage and the associated launch costs. The results indicate that a large cost saving and improved operability could result from implementing this concept. Many references are cited and a bibliography is included. Appendices cover a list of other uses for this technology, possible Pogo variations, and a survey of relevant supersonic inlets.
The original name of the concept is Pogo, as explained in the Background. While “Pogo” has meaning to those familiar with aircraft history it is not really descriptive, leading to one of the concerns expressed. Further, those familiar with rocketry associate the word “pogo” with an instability problem.
The name “Jet Engine Launch Assist Concept” (JELAC) is much more descriptive and may become the name as time goes by.
- Introduction, Table of Contents, Lists, and Glossary
- Background of Study
- Study Methodology
- Results of the Study
- Conclusions and Recommendations
- References and Bibliography
- Appendix A – Other Postulated Uses of Pogos
- Appendix B – Possible Variations of Pogos
- Appendix C – Survey of Supersonic Inlets
- Addendum 1 – 27 Mar 97, Update
Graphics
- Five-Engine Pogo Profiles With No Upper Stage – 12,306k
- Pogo-Pegasus Profiles – 114,347k
- Pogo-Pegasus Zooming – 4,592k
- Pegasus Firing Rocket While Pogo Returns To Base – 95,453k
- Early Pogo Configuration With Embedded Engines And Payload – 9,299k
- Early Pogo Configuration With Upper Stage Partially Embedded – 7,737k