Skylon is Hypersonic Space Aircraft

Skylon is a design for a single-stage-to-orbit spaceplane by the British company Reaction Engines Limited (REL), using SABRE, a combined-cycle, air-breathing rocket propulsion system, potentially reusable for 200 flights. In paper studies, the cost per kilogram of payload carried to low earth orbit in this way is hoped to be reduced from the current £15,000/kg (as of 2011),including research and development, to around £650/kg, with costs expected to fall much more over time after initial expenditures have amortised. In 2004, the developer estimated the total lifetime cost of the programme to be about $12 billion

[@tronghai55]

The skylon is feasible for low earth orbit as a breakthrough, but I doubt it could be reliable for an upper orbital vehicle especially with a open air design structure without an integrated orbital guidance for re-entry if not proven wrong otherwise by the specialists in orbital flight.

[@omega4chimp]

+Hai Nguyen Trong it would be really good to make a water dump giant jug inside of it to dump water off on the moon and mars and that's it just send hundreds of skyline space planes.

[@omega4chimp]

Use them to dump water off on the moon and mars.