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Mr. Burkhardt, president of the MM&A Ry., has been quoted as saying that if the air brakes released, the hand brakes would not have been capable of holding the train. It is astounding that a man with his background would make such a statement.  The premise of applying hand brakes is that they alone are to be set to hold the equipment 100% independently of the air brakes.  This requirement is necessary because the hand brakes are a backup in case of complete release of the air brakes, which can happen for a variety of reasons.   Hand brakes are not intended to merely add braking power to the air brakes.  They are a backup and completely redundant to the air brakes.
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