Question: what powered the original locomotives on mount washington cog railway
Answer: The early locomotives - represented today by the restored display locomotive , # 1 Old Peppersass - all had vertical boilers , like many stationary steam engines of the time ; the boilers were mounted to the locomotives ' frames with twin trunnions , allowing them to pivot as the locomotive and coach climbed the grade , permitting gravity to always keep the boiler vertically oriented , no matter what the gradient of the track .