The 140 mm M-14D turbojet smoke-smoke projectile is designed to smoke enemy observation points and firing points, for target designation or shooting, as well as to create smoke screens. The smoke-forming agent is yellow phosphorus or sulfuric anhydride in a mixture with pumice stone. Fuses B-25 or B-14.
Tactical and technical characteristics
| Caliber, mm | 140 |
| The length of the projectile with the fuse, mm | 1051 |
| Weight of final projectile, kg: - in HF yellow phosphorus - dressed in a mixture of sulfuric anhydride and pumice stone |
40,28 40,10 |
| Weight of smoke-forming substance, kg: - yellow phosphorus - sulphuric anhydride mixed with a pumice stone |
3,67 3,37 |
| Weight of explosive charge, kg: T-30 (for phosphorus) T-43 (for sulfuric anhydride) |
0,33 0,45 |
| Powder charge weight, kg | 7,65 |
| Powder charge burning time, s | 0,5–1,1 |
| Muzzle velocity of the projectile, m/s | 40–27 |
| The length of the active site, m | 128 |
| Flight speed at the end of the active section, m/s | 400 |
| Highest projectile range under normal conditions, m | 9800 |
| Temperature range of projectile warfare, °С | between -40 and +50 |
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