Original sentence: It also entered the language as a metaphor for an energetic traveller, so that phrases like "puffing like Billy-o" and "running like Billy-o" became common.It is still on display there.It was not particularly fast, being capable of no more than 3 to 5 mph (5 to 8 km/h).Puffing Billy locomotive.Puffing Billy was an early steam locomotive, constructed in 1813-1814 by engineer William Hedley, enginewright Jonathan Forster and blacksmith Timothy Hackworth for Christopher Blackett, the owner of Wylam Colliery near Newcastle upon Tyne.Relying on smooth wheels running on a flanged track or plateway, its eight-ton weight was too heavy for the rails and crushed them.This problem was alleviated by redesigning the engine with eight wheels so that the weight was spread more evenly
Edited sentence: It also entered the language as a metaphor for an energetic traveller, and phrases like "puffing like Billy-o" and "running like Billy-o" are thought to derive from the locomotive's name.It hs been transferred to the National Railway Museum in York, and is still on display there.It was not particularly fast, being capable of no more than 5 mph (8 km/h).Puffing Billy is an early railway steam locomotive, constructed in 1813-1814 by engineer William Hedley, enginewright Jonathan Forster and blacksmith Timothy Hackworth for Christopher Blackett, the owner of Wylam Colliery near Newcastle upon Tyne, in the United Kingdom.Running on cast iron [[Wagonway]tramway plates], its eight-ton weight was too heavy and broke them, encouraging opponents of locomotive traction to criticise the innovation.This problem was alleviated by redesigning the engine with four axles so that the weight was spread more evenly