[Spaceships] Real Life Non-Super Science Reactionless Engines

[malloyd]

Originally Posted by Anthony

So? I'm talking about the observer frame. This is simply an assertion that there exists a frame from which all FTL is forward in time. This can actually be true without the special frame being privileged by anything but coincidence, the wormhole network with virtual particle collapse create a preferred frame that matches the wormhole network.

There is no "observer" frame. The problem necessarily involves two observers in different frames - neither of which is necessarily stationary with respect to the ship.

FTL travel is by definition forward in time in the frames it is FTL in, that's inherent in the definition of the word "faster", which assumes you can define velocity sensibly somehow. The problem is that if some observer can see something move FTL, some other observer can see it arrive long enough before it departs to send a signal to abort the departure.