Scale 1:48. Plan shows the profile, plan and section view of the engines used for an unnamed 170ft paddle steamer for service in India and China (1847). The plan bears the signature of Oliver W. Lang [Assistant Shipwright at Chatham Dockyard 1844-1849] and John Penn [Director of John Penn & Sons 1830-1878]. The title of the drawing is "Engine Room for a pair of oscillating Engines of 160 H. P. collectively". The plan is torn in various places.