sentences:  The engines produced used forced draught and "Imperieuse" reached on her sea trials.The "Imperieuse"-class ships carried a maximum of of coal which gave them an economical range of at a speed of .The ship was initially brig-rigged with two masts, but these were replaced by a single military mast amidships shortly after completion as she proved to have very poor sailing qualities during her trials and to reduce weight by .