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Old 10-13-2017, 04:24 PM   #3 (permalink)
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Join Date: Jan 2014
Location: Little Neck, NY

I guess the market for 4-blade heads of that size is just too small, since most scale enthusiasts go for 600 or bigger.
Another problem is tail rotor authority with a 4-blade head and the associated lower head speed. As long as you were stuck with 325mm blades there was no chance to improve that by using longer tail blades. That has changed somewhat in recent years., with many more blade sizes available.
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