ARK-4001(b)  X-400 EP Helicopter KitARK-4001(b) X-400 EP Helicopter Kit
Specifications:
Rigid, light weight aluminum frame
Wooden balanced rotor blades.
Length : 630 mm (25 inches)
Height : 225 mm (9 inches)
Main Rotor : 588 mm (23 inches)
Tail Rotor : 150 mm (6 inches)
Weight 320 grams (11.3 ounces)
Flying Weight: 580 - 650 grams
(20.5 - 23 ounces)
Gear Drive Ratio : 1:9.85:5