The wing bent sideways, as I would expect with a big breeze on a 300 wide x 6m high wing.    It is very stiff fore and aft, would probably break the skin before it bent much in this direction.    No flutter, but some pretty violent changes to the lift direction as the wind swirled.    If it had fluttered, I would have tied the halyard to the end of the boom and pulled it tight.  It was free to rotate, but didn't as the bearings are not perfect and the axis of rotation is at the thickest part to optimise the carbon in the sides.  I was tempted to hoist the sail to see if it would weathercock, but managed to resist, partly as it was pouring rain, partly as there are multi thousand dollar gin palaces within falling range if the mast falls down. 

I weigh 80 kgs.  

The last couple of days there have been southerly gale warnings, which would be much less impeded.  Consequently, I turned the mast to face north to minimise the lift and the drag.  The southerlies did not eventuate, but today we had 35 knot westerlies.  The mast is still there.

rob