Thomas Coupling:
I was doing some pleasure flights today ( over 50 trips!)in a 206 and was doing some experiments with blade slap.
I found that it was mainly dependant on the aircraft weight. I tried steep approaches, shallow, fast, slow etc. etc. When heavy it was very hard to prevent while trying to remain in a fairly normal profile.
I know that on the 205 that at about 60kts and 500-600 ROD the blade slap is at its worst no-matter how heavy you are but the 206 is definitly different, the lighter I was the quieter and on the way back to base with only 30gals and me it was practically non-exsistant.
On our 205's the tail rotor is on the opposite side compared to a UH-1 and I'm sure they're a bit quieter