B6-4 Std Rocket Engine - EST1606 1100 High Torque Spektrum™ AR631 receiver with optional-use

Spektrum™ AR631 receiver with optional-use SAFE® Select flight envelope protection and AS3X® technologies

Spektrum™ G2 Smart Charger required (or compatible updated Smart Charger)

and SLT3 radio

Assembled and ready to use

Designed for explosive acceleration and maximum torque eliminating the need for a gearbox

B6-4 Std Rocket Engine - EST1606 1100 High Torque Spektrum™ AR631 receiver with optional-useThis is the B6 4 Standard Model Rocket Engines Motors from Estes. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12. Features Single stage engine Standard engine designed for flights in rockets weighing less than 4 ounces, including the engine Engines tested and certified by the NAR Easy to use and comes with clear instructions Specs Length: 2. 75" (7cm) Diameter: . 69" (18mm)