ENGINES FOR MODEL ROCKETS
3 – B4-4 Engines
4 – Starters
4 – Plugs
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.
Technical Specification
| 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
|
