Sorry... Arrow II, CS, three blade, 1st time. Other than that I have no other info.
Morgan:
Still not enough details. But here is some info for your benefit.
If I recall, depending on the prop OEM and balance equipment mfg’r the maximum dynamic balance weight at any one point varies from approx 25g to 45g. This would equate to 6 AN970-3 washers up to 11 washers of the same size.
The AN970-3 washer is a large fender-type with a 3/16th hole. These weight limits would also include the weight of the attachment hardware.
If there is a need to add more weight at that same location for proper balance, most guidance allows splitting the weight between two adjoining locations. This increases the total effective balance weight to 50g to 90g, or a total of 12 to 22 washers split into two separate stacks.
So if you have 4 AN970-3 washers installed at a single point that would amount to 16.4g which is below the max limit of most props.
Whether those 4 washers are considered “a lot” I would defer to your mechanic. But for comparison, if your prop was fresh out of O/H or had a static balance performed, I would expect to see a lower dynamic weight amount depending on the condition of the remaining items like the spinner/backplate, engine mounts, etc. But each case is different.
