[Randallw]

Baron Munchausen said:
That's a cool idea but has one fatal flaw. What if you request a ship for immediate use -- like in defense of the planet where the Temporal Space Yard is located -- and lose the battle. If the TSY is destroyed by orbital bombardment on the same or next turn after completing the ship, is it possible for the ship to have been completed in the 'future' after the battle?

This is why I mentioned the "Bill and Ted" factor

"Only the one who wins can travel to the past"