This is the glow powered, 2.4GHz radio controlled, almost ready to fly Thunder Tiger Raptor 50 S 3D Helicopter Combo. This version includes an iFHSS 2.4GHz Radio System and the Redline 53HX Engine. For RC Helicopter Pilots 14 Years of Age and Older. FEATURES: Control System: 90° Collective Cyclic Pitch Mixing (CCPM) with 10mm diameter main shaft, and main rotor with 6mm spindle and large radial and thrust bearings Autorotation gear: Constant drive design allows aerobatics during autorotation Tail Boom: Aluminum sized to fit 24.4" (620mm) blades Body: FRP construction, painted, with decals applied, carbon fiber look canopy Main Blades: FRP Tail Rotor Blades: White plastic Radio: 2.4GHz 6-channel programmable Sky Tech TS6i with digital rudder servo, four metal gear servos, system is trainer compatible with #AT1032 trainer cable (not included), Acro/Heli mixing, 8 model memory Gyro: Ace TG7000 heading lock Engine: RL-53HX with two needle valves, knife edge connecting rod lightened ringed piston, red machined heat sink head, push-pull throttle lever, redline R3 glow plug and Redline hi-flow 3D aluminum muffler, black in color Linkage System: Push-pull Landing Gear: Nylon with aluminum skids Flight Battery: 4.8V 1200mAh NiMH Fuel Tank: 11.5oz (340cc) INCLUDES: ARF Thunder Tiger Raptor 50 S Heli with 2.4GHz Radio System, RL-53HX Engine, Glow Plug, Gyro, Flight Pack, Wall Charger, Foam Blade Holders and Instruction Manual REQUIRES: Glow Fuel: Heli blend 15-30% nitro content Starting Shaft: 6mm hex size Electric Starter: 12V .90 size 12V Battery Remote Glow Starter Building and field equipment SPECS: Fuselage Length: 48.03" (1220mm) Fuselage Width: 5.51" (140mm) Total Height: 15.74" (400mm) Main Rotor Diameter: 52.95" (1345mm) Tail Rotor Diameter: 9.29" (236mm) Gear Ratio: 8.5:1:4.56 Fully Equipped Weight: 7.49lbs (3400g) COMMENTS: For Replacement Ball Bearings use: Qty. Size Location Qty. Bearing 1 8x16mm Drive Gear 1 DTXC1585 1 6x13mm Clutch Bell 1 DTXC1573 1 6x15mm Top Starter Shaft 1 ARZC2611 1 10x19mm Upper Main Shaft 1 HMXE7293 3 4x7mm Washout Assembly 2 DTXC1507 2 8x12mm Elevator Arm Control 1 DTXC1581 2 4x8mm Elevator Push-Pull Lever 1 DTXC1511 2 4x7mm Left Aileron Lever 1 DTXC1507 2 4x7mm Right Aileron Lever 1 DTXC1507 2 6x13mm Main Rotor Head 2 DTXC1573 4 4x7mm Flybar Assembly 2 DTXC1507 2 4x8mm Flybar Assembly 1 DTXC1511 4 5x10mm Tail Rotor Hub 2 DTXC1535 2 6x10mm Tail Pitch Slider 1 DTXC1561 1 5x11mm Tail Pulley 1 DTXC1547 jml 06.22.12 jxs 03/26/12 ir/jxs