rootbrowseIAC-06E4session 33. Scientific & Technical ReviewsPapers1. X-15B: The Spaceplane That Almost Was2. Swedish Sounding Rocket Projects3. Maruca: an early French navy liquid-fuelled rocket4. Fluorine rocket engine demonstrators 5. Goddard's 85 Years Optimal Ascent Problem Finally Solved6. The Fabric of Flight: From Early Balloons to Modern Spacecraft