This is the radio controlled, glow or electric powered, almost ready to fly Great Planes Shoestring Sport Racer Airplane. Wide sport flying envelope, from gentle to "racer" fast and responsive- Ideal for intermediate to advanced pilots. FEATURES: Construction: Fiberglass fuselage Wing: Two-piece foam core balsa sheeted with carbon fiber wing tube Landing Gear: Wheels: Two --" (--mm) diameter front, --" (--mm) rear Wheel Pants: Painted fiberglass Cowl: Painted fiberglass Canopy: Building Time: 6-8 hours Warranty Period: Great Planes warrants this kit free from defects in material and workmanship at date of purchase. This warranty does not cover any part damaged by use or modification. INCLUDES: REQUIRES: Radio: 4-channel w/4-5 servos Engine: 2-stroke .46-.55 cu in (7.5-9cc) OR 4-stroke .70-.81 (11.5-13.5 cc) OR Brushless Electric Motor: Great Planes RimFire Outrunner ESC: 80A brushless Battery: LiPo 6S 3200mAh SPECS: Wingspan: 54" (1372mm) Length: 47" (1195mm) Wing Loading: 26 - 28 oz/sq ft (79 - 85 g/sq dm) Weight: 6.5 - 7lb (2948 - 3175g) Center of Gravity (CG): Control Throws- Low Rate High Rate Ailerons: Up & Down 1/2" (12.7mm) 3/4" (19.1mm) Elevator: Up & Down 3/4" (19.1mm) 1" (25.4mm) Rudder: Right & Left 2" (50.8mm) 2" (50.8mm)