Model Rocketry
Specific impulse is also used to measure performance in model rocket motors. Following are some of Estes' claimed values for specific impulses for several of their rocket motors: Estes Industries is a large, well-known American seller of model rocket components. The specific impulse for these model rocket motors is much lower than for many other rocket motors because the manufacturer uses black powder propellant and emphasizes safety rather than maximum performance. The burn rate and hence chamber pressure and maximum thrust of model rocket motors is also tightly controlled.
| Engine | Total Impulse (Ns) | Fuel Weight (N) | Specific Impulse (s) |
|---|---|---|---|
| Estes A10-3T | 2.5 | .0370 | 67.49 |
| Estes A8-3 | 2.5 | .0306 | 81.76 |
| Estes B4-2 | 5.0 | .0816 | 61.25 |
| Estes B6-4 | 5.0 | .0612 | 81.76 |
| Estes C6-3 | 10 | .1223 | 81.76 |
| Estes C11-5 | 10 | .1078 | 92.76 |
| Estes D12-3 | 20 | .2443 | 81.86 |
| Estes E9-6 | 30 | .3508 | 85.51 |
Read more about this topic: Specific Impulse, Examples
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