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My Ham 3 rotors manual says its able to handle a load rating (sq. ft.) of 7.5 when mast mounted. So to not go over 80% of its holding capacity would be to to mount anyting with a surface radius (sq. ft.) of 5.925 or less.

I miscalculated for the Imax 2K and the M104C for my rotor when mast mounted.

Now the M103C and the Imax 2K should stay under the 80% holding capacity of my rotor. The M103C only has a surface radius (sq. ft.) of 4.5 or 60% of the holding capacity. So assuming the Imax dosn't have a surface radius (sq. ft.) of 1.925, I should stay under the 80% threshold.

I agree it would be better to tower mount my rotor and I might end up doing that.

[QUOTE="SMILEX2692002, post: 401424, member: 22456"] My Ham 3 rotors manual says its able to handle a load rating (sq. ft.) of 7.5 when mast mounted. So to not go over 80% of its holding capacity would be to to mount anyting with a surface radius (sq. ft.) of 5.925 or less. I miscalculated for the Imax 2K and the M104C for my rotor when mast mounted. Now the M103C and the Imax 2K should stay under the 80% holding capacity of my rotor. The M103C only has a surface radius (sq. ft.) of 4.5 or 60% of the holding capacity. So assuming the Imax dosn't have a surface radius (sq. ft.) of 1.925, I should stay under the 80% threshold. I agree it would be better to tower mount my rotor and I might end up doing that. [/QUOTE]

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