Reinforced wind mills has stronger (and heavier) blades that makes it much harder (or even impossible) to break.
At the cost of 25% reduced efficiency.
Recipe:
AXA
XWX = Reinforced wind mill
AXA
A= advanced alloy
X = empty
W = wind mill
[Main reason: Wind mills when break it releases 4 iron ingots, that are IMPOSSIBLE to recover them all. Even with RP/Water collection system, since some iron stay bugged inside the block (did the test at server now)]