Overview
Ocean Water is a modified variant of the team's first composite propellant. It uses higher solids loading and fewer additives to achieve improved performance.
Find the Grain Log here.
Formula
Appropriately certified individuals can find the formula here.
Burning Properties
ISP*: 205-225s
a: 0.018 in/s
n: 0.383
Density: 0.057416 lb/in^3
gamma: 1.25
molar mass:
Mechanical Properties
Main article here.
Mixing
This records all of the mixings of this propellant performed by the team.
Mixing Date | Serial Numbers | Site | Result |
|---|---|---|---|
| 9-29-2017 | 98-PT #1, #2 | 17-110 | First two 98 mm grains mixed. Improper equivalent weight calculation lead to soft cure. |
| 11-7-2017 | 98-PT #3 | 17-110 | Mixing to characterize EZ-Cast. Used old mixer. |
| 11-12-2017 | 98-PT #4 | 17-110 | Used old mixer. Improvements to casting process. Slightly lower solids loading |
| 11-14-2017 | 98-PT #5-7 | 17-110 | First mixing with new mixer. 3 characterization grain for characterization testing. |
| 11-22-2017 | 98-PT #8-10 | 17-110 | 3 grains for characterization testing. Stopped using EZ-Cast. |
| 11-28-2017 | 98-PT #11, #12 | 17-110 | Used finalized casting procedures |
| 12-6-2017 | OW-152 #1, #2 | 17-110 | First 6 inch grains. Densities were consistent with the 98mm grains used for characterization. |
| 12-8-2017 | OW-152 #3-5 | 17-110 | Next 3 6 inch grains. 2 dogbones were also cast. Results pending. |
| 12-20-2017 | OW-152 #6-8, OW-98-FIN1 | 17-110 | The "MegaMix" |
| OW-152 #9-12 | 17-110 | ||
| OW-152 #13-16 | 17-110 |
Testing
Test # | Date | Site | Result |
|---|---|---|---|
| Characterization Static Fire #1 | November 25, 2017 | Crow Island | Nozzle Failure |
| Characterization Static Fire #2 | November 25, 2017 | Crow Island | Nozzle Failure |
| Characterization Static Fire #3 | November 25, 2017 | Crow Island | Motor success, pressure transducer failure |
| Characterization Static Fire #4 | November 25, 2017 | Crow Island | Motor success |
| Characterization Static Fire #5 | December 2, 2017 | Crow Island | Motor Success! Highest pressure to date: 695 psi |
| Characterization Static Fire #6 | December 2, 2017 | Crow Island | Success, excellent BATES curve |
| OW-152-4G #1 | Janurary 14, 2018 | Crow Island | Full Duration. First Try. |
| OW-152-4G #1 | Janurary 27, 2018 | Crow Island | Success |
| OW-98-FIN1 #1 | Janurary 27, 2018 | Crow Island | Success of a very angry motor |
| OW-152-8G #1 | Feburary 10, 2018 | Crow Island |