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Item #:
13942959
Estes® B4-4 Model Rocket Engines 3 pk
Item #:
13942959
CAD 81
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Imported from USA store
QTY:
Order now and get it around Wednesday, July 15
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The Estes B4-4 engine is a single stage engine designed for model rocket flight, and is suitable for rockets weighing less than 3.5 ounces, including the engine.
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What Stands Out
High Performance
Each B4-4 engine is designed for stable, high-powered launches, providing an impressive thrust to elevate your rocket design to impressive altitudes, enhancing the overall flight experience.
Reliability
Estes® engines are rigorously tested for consistency and safety, ensuring that model rocketeers can trust their performance for every launch, minimizing the risk of failure during exciting rocket launches.
Compatible Variety
Designed for versatility, these engines are compatible with a range of Estes® rockets, making them an essential addition for hobbyists who seek flexibility in their model rocket assemblies and configurations.
Product Details
- Includes 3 engines, 3 igniters, and 4 igniter plugs
- Single-stage engine for model rocket flight
- Designed for rockets weighing less than 3.5 ounces, including the engine
- Can only ship via USPS due to classification as a toy propellant device
- California Proposition 65 warning regarding exposure to chemicals
| Toy replacement part & accessory type | Rocket Motor |
| Brand | unknown |
| Material | Wood |
| Color | Multicolor |
| Age range | 14 years |
| Piece count | 3 |
| Manufacturer | HRP |
| Height | 0.750 in (1.9 cm) |
| Weight | 0.17 lb (80 grams) |
| Count per pack | 3 |
| Color category | Beige |
Who Should Buy?
-
Beginners
Ideal for novice model rocketeers; offers predictable flight performance for learning and enjoyment in rocket launching.
-
Educational Use
Great for classrooms and science projects, teaching students about physics and engineering principles in a fun way.
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Hobbyists
Perfect for rocketry enthusiasts looking to add power to small rockets while enjoying a stable and reliable flight.
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Advanced Users
Experienced rocketeers may find the B4-4's power underwhelming for larger, more complex rocket designs and expectations.
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Heavy Payloads
Not suitable for models designed to carry heavy payloads; the B4-4 may not provide enough thrust for safe launches.
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Indoor Launching
These engines are designed for outdoor use; launching indoors can be unsafe and may violate safety regulations.
Product Description
Estes® B4-4 Model Rocket Engines 3 pk
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is included in the package?
Answer: Each package includes 3 engines, 3 igniters, and 4 igniter plugs. -
Question:
What type of rockets is it suitable for?
Answer: It is designed for rockets weighing less than 3.5 ounces, including the engine. -
Question:
How is it classified for shipping?
Answer: It can only ship via USPS due to its classification as a toy propellant device.
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
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6/7/2026 · via Trustpilot
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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CAD 81
Order now and get it around Wednesday, July 15
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Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
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Fastest cross-border delivery
Features & Benefits
- Includes 3 engines, 3 igniters, and 4 igniter plugs
- Designed for rockets weighing less than 3.5 ounces
- Suitable for model rocket flight
- Single stage engine
- Can only ship via USPS due to toy propellant device classification
- Proposition 65 warning for chemicals