Description

B4-2 Model Rocket Engines

The Estes B4-2 is a dependable single stage model rocket engine built for consistent, enjoyable flights in lightweight rockets. Designed to deliver steady, usable thrust for rockets under 4 ounces, this engine gives hobbyists reliable lift and smooth flight profiles that make launching simple and satisfying.

Whether you are teaching a new rocketeer, flying at a club launch, or enjoying backyard hobby flights, the B4-2 balances performance and predictability. Its clean burn and dependable ignition help reduce launch day surprises so you can focus on building great flights and good memories.

Features:

• Pack of 3 Engines
• 3 Igniters
• 4 Igniter Plugs
• Single Stage Engines
• Casing Dimensions: 18mm x 69mm / .69″ x 2 3/4″
• Fits BT20 Body Tubes and 18mm engine tubes
• was item 1601

Specifications:

• Motor Type: Black Powder
• Total Impulse: 5.00 Newton Seconds(N-sec)
• Delay: 2 seconds
• Maximum liftoff weight: 4.0 oz / 113 gms
• Maximum Thrust: 13.2 Newtons/ 3.0 lbs
• Thrust Duration: 1.1 Seconds
• Initial Weight: 0.70 oz / 19.8 gms
• Propellant Weight: 0.29 oz / 8.33 gms
• Burnt/Empty weight: 0.41 oz / 11.47 gms (est)

National Association of Rocketry Engine Certification is attached in the images.

WE TRY TO SHIP WITHIN ONE BUSINESS DAY AND SHIP MOTORS GROUND COURIER – FASTER THAN OTHERS

WE SHIP ENGINES ONLY CANADA DUE TO SHIPPING REGULATIONS. (Regular items do ship there!) We are a certified shipper of Rocket Motors

Canada Only:

May not be sold to a person under 12 years of age. UN0432 1.4s. Do not launch model rocket motors in a manner that would endanger flying aircraft and or become a hazard to aircraft. Interdit a la vente pour les moins de 12 ans. UN0432. Ne pas lancer les modeles de fusee de soprtes qu’ils seraint un danger pour las securite aerienne.

To destroy – soak in water – do not burn.

Contents subject to change