BREMEN, Germany — Beijing-based Space Transportation is projecting the second half of 2025 for a first test of its Cuantianhou near space reusable spaceplane prototype. Space Transportation, or Lingkong Tianxing Technology, said in late October it conducted a test flight of a prototype commercial transport plane that can travel at Mach 4. Followup assessments for its engine technology are planned for November. The company put a model of the Cuantianhou spaceplane on display at Space Tech Expo Europe here in Bremen. The prototype will have a length of 11.8 meters,…