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13th July 2016 | 12:58

#98 (permalink)

Onceapilot

Joined: Oct 2012

Posts: 1,765

Likes: 3

From: UK

Reusable/semi-reusable solid or liquid hydrogen + oxygen boosters will remain the cheapest payload to orbit, this side of the discovery of dilitiumn crystals.

OAP

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