Some parts of the Radikal E640 Build video above are based off builder's own opinions. They are not necessary to perform during the actual build.
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Starting a new class of helicopters by incorporating the use of blade sizes up to 640mm allows 700 class flight characteristics in a smaller, more affordable package.
By offering an electric helicopter at a slightly larger size than a 600 yet smaller than a 700, go ahead, push it to its limits. With increased strength, rigidity, and quality engineering, this is a 12S fire-breathing little monster.
CNC full metal precision rotor head w/8mm spindle.
A choice of flybar or flybarless models
11 tooth 5mm shaft size pinion, mod 1 (straight cut).
103 tooth main gear, mod 1 (straight cut).
4.0: 1 Tail Gear Ratio
Designed for power system up to 12S Li-Po
Carbon fiber frames for ultra-rigid and compact design
Easily serviceable engine maintenance
Push/pull CCPM control system
Break-away canopy standoffs
Triple bearing supported 10mm hardened main shaft
120 degree dual race ball bearing metal swashplate
High quality DuPont® plastic injection mold w/strengthening fibers
Stainless steel damper mounted bearing torque tube for high efficiency
Ultra high strength torque tube gears
Top to bottom supported tail pitch plate for improved accuracy