Good helicopter rotor designs?

#1
As the title suggests, I am trying to work on a good, easy to control assault helicopter(Not a multicopter or quadrocopter) that packs a lot of a punch along with fitting into the bounding box, but I need a very good and powerful, stable rotor design for that.
I have tried tuuvas' rotor design which is very good, but the problem is to provide enough lift for my helicopter I need aerodynamic props, and when I do that, since spinning blocks are automatic, which means the heli will lift off and I would have to reduce lift right when I start tpit, which can be annoying or lead to unbalance.
So here is what I need for a good rotor design for me helicopter:
-Fits in the bounding box
-Must not be any taller than 4 blocks
-Must be very balanced
-Should not break apart easily; Must be rigid
-Should not be automatic, that's usually annoying.

Thanks for helping, and please provide multiple pics of you rotor design and explanation!
 
#2
Well, first don't use spinning blocks alone. Put it on a wheel. (Or use two wheels.) Balance the spinning block's speed so you have exactly enough lift to hover, then climb by spinning it faster with the wheel.
 
#4
Hitting up spins the wheel, makes the spinning block go faster, increasing lift. Hitting down slows the block, decreasing lift.
You can also use large wheels instead of spinning blocks.



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