Shadows, I don't have one quite that large, but I do have the 40" broad sword from Starfire. Weighs nearly 10 lbs. 40" blade, and yes I can swing it fairly effectively. I help my cousin teach stage fighting every once and awhile. The moves we tend to use are actually quite effective if in a real combat situation, but we slow them down and use blunted edges.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf