Potvis

"'Back in the 1930s Dutch Railways decided to try out streamlining on one of their locomotive classes. 4 locomotives of the NS 3700 class were converted to have the streamlining, but it was removed shortly after because the locomotives performed worse.' - Gamepass Description"

The Potvis (Also known as the NS 3800) was a Dutch 4-6-0 (2'C) steam locomotive. They were a streamlined version of the NS 3700 express locomotive.

Technical Details
The Potvis locomotives are a streamlined version of the NS 3700, at a time where style and speed were the top priority for most railways at the time. In the 1935, after the succes of the streamlined DE-3's, the Nederlandsche Spoorwegen decided to undertake tests with streamlining steam locomotives.

The Werkspoor factory in Tilburg streamlined the first locomotive (NS 3804), adding 3.2 tons to the locomotive's weight. The remaining 5 received their 2.7 ton streamlined casing in Zwolle. The streamlining lowered their fuel consumption by 10-15%, making them a small success. This didn't last long as the maximum speed got lowered in 1942, making the streamlining practically useless. Shortly after the start of World War II, the streamlined casings were removed and they were converted back to conventional NS 3700s.

Price
The Potvis can only be bought as gamepass, which costs 50 Robux.

Liveries
Currently, the only livery available is Nederlandse-Spoorwegen Green. However, it has received a temporary livery during the 2021 April Fools update, LNER Garter Blue, with "Mallard" written on both sides of the cab, and the 2022 April Fools update, in which it was made to resemble an NS VIRM in Flow livery.

Trivia

 * Although the Potvis went out of service prior to Streamlined's time period, it was added as a gamepass because of its unique look.
 * The weight of the casing makes the Potvis' maximum speed 5 km/h slower than the NS 3700 in-game.
 * In real life, the few tons extra didn't affect their maximum speed.
 * The streamlined casing causes the last driving wheel to become hidden or hard to spot, but it is there.
 * One of the more notable Potvis locomotives is NS locomotive 3804 which debuted in 1936.
 * Potvis in Dutch means 'Sperm Whale', this is due to the striking resemblance to the animal.
 * Other nicknames given to the locomotives were 'Strijkbout', 'Badkuip' and 'Lelijke pantserwagens', which mean 'Iron', 'Bathtub' and 'Ugly Armoured Cars' respectively.