I don't know how many people are aware of this voyage, but some reborn Vikings built a longship after studying ancient techniques. The longship is called the Harald HÃ¥rfagre and is currently making the voyage between Norway and the Great Lakes.
http://drakenexpeditionamerica.com/I have always been looking for sources on how long trips by longship would take, and we've put the averages in Denizens of the North. But this is expedition really helps nail down the numbers. Obviously there are better sea charts these days, but the crew (as great as they are), won't have the same knowledge of sea-faring as did the Viking ancestors who were born to the sea. Chances are that they made better time as the trip wore on because they improved in their craft. So for interest sake:
From Norway it took 4 days to get to the Shetlands.
4 days from the Shetlands to Faroe
3 days from Faroe to Iceland
6 days to Greenand
I will be going to meet the crew tomorrow, does anyone have any specific questions they'd like me to ask?