Nice entries Fenya and Starhawk I admit this challenge has turned out to be geared more for long distance rather than size, and I can fix that for next time but I'm not the sort to go changing rules part-way though and spoil anyone's fun, If I had we'd not have seen just how far such small craft as those presented here could really be made to go. Restrictions can take the fun out of things, keep it simple, that's the key As for Tank, he was trying for a while in IRC and his craft looks like it can do it, though you'll notice that for his entry and your own, the highest speed achieved is strangely only 750m/s so I think there's a few bugs in the flight log, and his last pic shows an elapsed time of zero so he must have left the scene and returned. It's also possible his total MET was 1 day, 0 hours 38 minutes and 24 seconds, but I doubt that, I'll ask him about it Edit: Something is afoot!