The Estes B4-4 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 3.5 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.
| ADDITIONAL INFORMATION |
| Length |
2.8 in. (7 cm) |
| Diameter |
.7 in. (18 mm) |
| Estimated Weight |
.68 oz. (19.3 g) |
| Total Impulse |
5.00 N-sec |
| Time Delay |
4 Seconds |
| Estimated Max Lift Weight |
3.5 oz (99 g) |
| Max Thrust |
13.20 Newtons (3.0 lbs) |
| Thrust Duration |
1.10 Seconds |
| Initial Weight |
0.68 oz (19.2 g) |
| Propellant Weight |
0.27 oz (7.6 g) |
| Quantity Per Pack |
3 |
