B6-4 Standard Engines Educator Bulk Pack for Model Rockets (24) (EST1783)

The Estes B6-4 Engine Bulk Pack provides dependable 18 mm single-stage power for model rockets weighing up to 4.0 ounces or 113 grams. Its balanced thrust and four-second delay make it a versatile choice for classroom programs, youth groups, clubs, and hobby launches where consistent flight performance is important.

Each bulk pack includes twenty-four B6-4 engines, thirty starters, twenty-four starter plugs, and seventy-five squares of recovery wadding. With supplies for up to twenty-four launches included in one package, the bulk format helps simplify preparation for group activities and repeated flying sessions.

The B6-4 delivers a total impulse of 5.00 N-sec with a maximum thrust of 12.10 Newtons or 2.7 pounds. Its thrust duration is approximately 0.80 seconds, followed by a four-second delay before ejection. This combination provides a strong boost, a moderate coast period, and dependable recovery system deployment for compatible rockets.

Each engine measures approximately 2.8 inches or 7 centimeters long and has an 18 mm diameter. The engine weighs approximately 0.63 ounces or 17.9 grams and contains approximately 0.23 ounces or 6.5 grams of propellant.

The B6-4 can be used with compatible model rockets including the Generic E2X, Alpha III, Wizard, Viking, and Alpha. Its consistent performance and convenient bulk packaging make it a practical choice for educational rocketry, STEM activities, club events, and other group launches. Always verify the rocket manufacturer's recommended engine configuration before use.

Purchasers and users of Estes model rocket engines are responsible for following all applicable local, state, and federal laws, regulations, and safety standards. Model rocket engines must be handled and used only as intended and in accordance with established model rocketry safety practices. Estes Industries, LLC disclaims liability for personal injury, property damage, or other loss resulting from misuse, improper handling, or unauthorized use of its model rocket engines.