Search query: b4-4 rocket engines

Product: Estes A8-3, B4-4, B6-4 Mini Bulk Pack - 9 Engines/Motors with Starters
Brand: Generic
Relevance: Exact
This combo pack provides 3 each of the most popular Estes engines for use in most model rockets. The B6-4 is a medium impulse engine that delivers high altitude flights. It works great for launching larger, heavier rockets, too. The B4-4 model engines which is suitable for use in rockets weighing roughly between 1 and 2 ounces which is typical of most rockets being 1 to 2 feet tall. The A8-3 is a single stage engine designed for model rocket flight. It is a standard engine designed for flights in rockets weighing less than 3 ounces, including the engine.
All the engines you need for low and medium altitude model rocket flights
The best way to get engines in bulk without having to buy 24 of them.
Estes engines are the model rocket industry standard

Product: Estes C6-7 Mini Bulk Pack - 3 Packs of 3 for 9 Engines/Motors with Starters
Brand: Generic
Relevance: Substitute
This mini bulk pack provides 9 of the Estes C6-7 model engines. Estes model rocket engines are the standard in the model rocket industry for easy to use and reliable propulsion for your model rockets.
The best way to get C6-7 engines in bulk
Estes engines are the model rocket industry standard
This engine can also be used as a single stage engine in lightweight rockets
Upper stage engine

Product: Space Corps Centurion Launch Set
Brand: Estes
Color: Multi
Relevance: Irrelevant
There’s no thrill quite like launching a model rocket, watching it streak skyward, reach peak altitude, and then return gently to earth. When you build them, the thrill is even better than ever. Thanks to Estes model rocketry, kids can explore the wondrous world of science while experimenting with different combinations of rockets, engines and accessories to better understand how rockets reach outer space.
SKILL LEVEL: The Space Corps Centurion is an easy-to-assemble, Beginner level rocket with pre-colored parts.
RECOMMENDED ENGINES: A8-3, B4-4, B6-4, C6-5
PROJECTED ALTITUDE: 700 ft. (213 m) on a C6-5
ESTIMATED ASSEMBLY TIME: 15 Minutes

Product: Estes C6-5 Model Rocket Engine 3/pk. by Estes
Relevance: Substitute
The Estes C6-5 engine is a single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 4 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.
Can NOT ship to HI, AK, APO. Puerto Rico and international addresses

Product: Estes 803 Bandito Flying Model Rocket Kit
Brand: Estes
Color: Green
Relevance: Irrelevant
E2X - Easy to Assemble
Recommended Engines: 1/4 A3-3T (First Flight), 1/2A3-2T, A3-4T, A10-3T
Package Dimensions: 2.54 H x 33.02 L x 12.192 W (centimeters)
Package Weight: 0.1 pounds

Product: Estes PS II Launch Controller
Brand: Estes
Color: Brown/a
Relevance: Irrelevant
Great for launching cluster engine powered rockets!
Fully assembled, just add your own 'C' batteries
A brand new launch controller