Estes Rockets - B4-4 Model Rocket Engines (3pk) Carisma the HS-311 represents a remarkable

the HS-311 represents a remarkable value in today's R/C market

9 wheels with soft compound off road tires

and the unique detachable prop system adds to the durability by nearly eliminating broken props and bent motor shafts

ensuring a seamless bolt-in installation

Four (4) AA batteries (Reedy #302)

Estes Rockets - B4-4 Model Rocket Engines (3pk) Carisma the HS-311 represents a remarkableThe Estes B4 4 is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 3. 5 ounces, including the engine. Each package includes 3 engines, 4 starters, and 4 plugs.