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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 4 - PRIMERS AND TRACERS |
| Section 3 - TRACERS |
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Mk 9 |
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Over-all length, inches |
2.48 |
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Diameter of head, inches |
1.248 |
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Starter mixture |
Barium peroxide, magnesium powder, barium nitrate |
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Illuminant |
White - aluminum powder and wax |
| Red - strontium nitrate, ammonium perchlo-rate, magensium powder, charcoal, and linseed oil | |
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Projectiles used in |
4"/50, 5"/38, and 5"/25 |
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Propellant gases burn through the celluloid disc and ignite the starter, which fires the illuminant |
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Figure 112. Tracers (not proportionate size) |
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