11. The solid rocket propulsion unit was developed by CITEFA. 12. Vehicles can then climb the tether and reach orbit without the use of rocket propulsion . 13. Robert L . Forward pioneered interstellar propulsion concepts including photon propulsion and antimatter rocket propulsion . 14. The propulsion laboratory also demonstrated experiments on rocket propulsion . 15. Environmental Aerospace Corporation ( eAc ) was incorporated in 1994 to develop hybrid rocket propulsion systems. 16. Increasing the amount of propellant risked damaging the occupant's spine, so experiments with rocket propulsion began. 17. The Squall system includes rocket propulsion technology that Russian designers claim is unmatched in the West. 18. From 1946 until the mid 1990s, the site was the home of the Rocket Propulsion Establishment. 19. In 1931, the two began experimenting with various types of rocket propulsion systems, including liquid propellants. 20. Another beacon is destroyed despite their best intentions, and the fragments are stolen using rocket propulsion .
