Скачать или смотреть Stephenson Valve Gear

Somebody asked about Stephenson valve gear. Here is an example out where you can see it, and photos of other examples.

Portersville (PA) Steam + Gas Show

Stephenson was used on the vast majority of non-turbine steamships and steamboats, either vertical like Titanic or inclined such as SS Waverley.

It was almost never used on locomotives after about 1900, since it lacks lateral stability and thus easily damaged. Locomotives used more complex valve gear, but designed to be supported by rigid frames. Nearly all early locomotive uses were located between the engine frames, very difficult to maintain. I saw one example of outside Stephenson on a small German engine on the Achern - Ottenhofen (?) museum line back in 1970. Very awkward looking.

Stephenson Portersville 130804