The BLU-14/B was an American 347 kg (766 lb) ground-penetrating anti-vehicle mine for release by low-flying (down to 11 m (35 ft) altitude) aircraft. It was a derivative of the MLU-10/B land mine, and therefore essentially identical in shape and weight to the BLU-31/B anti-vehicle demolition mine and bomb. The designation "BLU" stands for Bomb Live Unit, as opposed to "BDU" (Bomb Dummy Units) used for practice.
The BLU-14/B has a low, stable ricochet trajectory that is predictable within close limits. It will penetrate into the ground at an angle that is less than half that required by an M117 bomb.Offen, George R., 1st Lieutenant, USAF, Project Engineer, "Engineering Evaluation of M117 Bomb with Blunt Nose", Technical Documentary Report No. APGC-TDR-64-51, APGC Project 0157W, Munitions Test Directorate, Deputy for Test Operations, Air Proving Ground Center, Air Force Systems Command, USAF, Eglin Air Force Base, Florida, August 1964, Section 1 - Introduction, page 1. The BLU-14/B and MLU-10/B differ only in regard to their respective fusing.Offen, George R., 1st Lieutenant, USAF, Project Engineer, "Engineering Evaluation of M117 Bomb with Blunt Nose", Technical Documentary Report No. APGC-TDR-64-51, APGC Project 0157W, Munitions Test Directorate, Deputy for Test Operations, Air Proving Ground Center, Air Force Systems Command, USAF, Eglin Air Force Base, Florida, August 1964, Section 1 - Introduction, page 2.
All three weapons (the BLU-14, MLU-10, and MLU-31) have a blunt flat front end of thickness.Offen, George R., 1st Lieutenant, USAF, Project Engineer, "Engineering Evaluation of M117 Bomb with Blunt Nose", Technical Documentary Report No. APGC-TDR-64-51, APGC Project 0157W, Munitions Test Directorate, Deputy for Test Operations, Air Proving Ground Center, Air Force Systems Command, USAF, Eglin Air Force Base, Florida, August 1964, Section 4 - Discussion, page 27.
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