I've heard from someone that the ship overturned because some people added extra cannons to the original design (or something like that, related to redesigning). But I'd guess someone might've added some "speed holes" while still on it ("pimp my ship"?).

there's some short coverage of what happened at wikipedia:
http://en.wikipedia.org/wiki/Vasa_%28ship%29#Maiden_voyageBut this creation is not really that impressive. I'm just happy to have finished this old model: I first started working on it more than 10 years ago, but didn't get too far. then it just collected dust in many years (just the main body assembled), before I started working on it again. I got as for as adding masts and most stuff (and some paint) before I stopped working on it again.
And then,
finally, I started working on it again a few months ago. This time having more patience and time on my hands, I ended up looking at a few concepts online for how the wasa
might have looked in reality, and actually repainted and "reassembled" some parts (like the cannon hatches).
To sum it up: about 45cm long and 40cm high, just a plastic model without any wooden parts or custom created parts. during the time some cannons (for the sides) have been lost (so some hatches on the other side are closed), the painting might be a bit off (especially if should have been red instead of blue

) and not applied with great precision. But it felt nice to finish it (after failing utterly with the shell of my pedantic attempt on that ferrari).
On the other hand, a neighbour here used to build wooden scale ships, and have also built a scale version of the wasa. obviously bigger and with much, much greater detail than this (I think a someone from a construction firm ended up buying it from him to use as a decoration in their office

).