Estes B6-4 Engines – Standard Model Rocket Engine 3-Pack Ender 3 V3 Plus Model: FSR402 Short Leg

Model: FSR402 Short Leg

50 × 32 × 18 mm

Using modular construction components

📌 Perfect For

Designed for young scientists and engineers

Estes B6-4 Engines – Standard Model Rocket Engine 3-Pack Ender 3 V3 Plus Model: FSR402 Short LegEstes B6 4 Engines Balanced Power for Mid Size Rockets The Estes B6 4 engine is a versatile option for standard model rockets, offering a balance of thrust and delay for smooth, controlled flights. Designed for rockets up to 4. 0 oz, it provides reliable performance with a 4 second delay for proper recovery system deployment. Key Features Standard 18 mm engine size compatible with many Estes rockets 4 second delay for controlled parachute deployment