No.7 on display at Hamar Railway Museum. Unfortunately its location is very confined, making photography difficult. The style of the Thunes built locomotives of this class is extremely interesting, and displays a number of nineteenth-century American influences, including the un-painted planished-steel boiler cladding and the spacious wooden cab, which made use of the excellent timber available in Norway. The Scottish Dübs built locomotives of the same class had steel cabs.
A close-up view of No.7's cab and four-wheel tender.
Another view of No.7's cab which was designed to protect the crew from the harsh Norwegian climate.
Taking a side view photograph of No.7 is unfortunately almost impossible due to the confined location, combined with strong backlighting. This is my best attempt using a fisheye lens, then defishing it with computer software, and using PhotoShop to compensate for the backlighting.
No.7 is a two cylinder compound with cylinder diameter of 320 and 480mm, cylinder stroke of 457mm, driving wheel diameter of 1422mm, coupled wheelbase of 1905mm, and a total locomotive wheelbase of 3886mm. The tender wheelbase is 1829mm, and the total wheelbase of the locomotive and tender is 7864mm. The overall length is 11,582mm.
The total weight in working order is 32.6 tonnes, and the maximum axle load only 6.9 tonnes. Water capacity is 3,100 litres, and coal capacity 1 tonne.
The maximum permitted speed running forwards was 55 km/h, and tender first was 35 km/h.
No.7's kerosene headlight.
The maker's plate on No.7. "Thunes Mekaniske Værksted" translates to Thunes Mechanical Workshop, and Kristiania was the name of the city of Oslo in 1901. (The name was changed to Oslo in 1925).
All photographs Copyright Frank Stamford, 2010, who may be contacted by email at: email@example.com
Last updated: 27 December 2010