Editing Snowpiercer (section)

==Engineering==

===The Eternal Engine===
Snowpiercer is powered by a perpetual-motion engine designed by Chief-Engineer Melanie Cavill and referred to as the ''The Eternal Engine'', running on hydrogen gained from snow outside. Engineer Bennett Knox noted that, while the fuel is eternal, parts of the Engine are not and will eventually break and need replacement.  It appears to produce more power when traveling at greater speeds. A display in the Engine Car features kWh/km units. As the train slows, the energy produced decreases, as does the distance traveled per second, providing a "double whammy" effect of reducing power.

At the train's average speed of about 100 km/hour, each "unit" of power production gives 100 kW, and from an estimated typical power generation of 20 kWh/km, the train's total power production is normally 2 MW, enough for roughly 2,000 modern American homes. It seems to be enough to keep the train life support and communication systems working, load the Battery Cars, and make the First Class extra-amenities (sauna...) work.

===Carriages dimensions===
[[File:CarByAlexNice.jpg|thumb|339x339px|3D First Class type B Guest Carriage model by Alex Nice.]]Based on in-universe math, the average length of the cars is little over 16 meters or 52.5 feet. Based on the blueprint of the Brakeman's Garrison in the title credits of the series, however, a typical car is about only 40 feet long and 13 feet 6 inches wide (12.2m long and 4.1m wide). From external images of the train, the height of cars seems to vary between about 1.5 and 2 times the width (20-26 feet, or 6-8m tall) and would fit about two stories and a half.[[File:Snowpiercer concept Alex Nice.jpg|thumb|339x339px|The Snowpiercer concept art by Alex Nice, which serves as a basis for the CGI model.]]Based on the concept art by Alex Nice, the train is even larger, being around 9 meters wide, 12 meters tall and 65 meters long per car (83 meters at the engine). This would make the 1001 car train exceed a length of 38 miles or 65.1 km. This is probably the closest to the actual dimensions since most cars have 2 levels, plus the Sub-Train and the wheel mechanisms underneath them. However, the scale used during the set is downscaled.

According to Wilford, the train is 10 miles long<ref>[[Many Miles From Snowpiercer]]</ref> ("Three thousand souls stufffed into a ten miles steel tube"). This would put the average length of a carriage at 15.56m (10 miles = 16.09km, 16.09km = 16.090m, 16.090m/1034 carriages = 15.56m per carriage).

===Utility Cars and the Sub-Train===
Numerous Carriages are shown to be preceded by intermediary Utility and Battery Cars. Those cars are necessary to maintain life support systems (water, electricity, temperature, air quality...) all along the train. Battery Cars mainly house power banks to accumulate power as the train travels. At least 37 Battery Cars were offline after the civil war.

Each car has two [[Sub-Train]] platforms underneath its main deck. The platforms, only accessible from Utility and Battery Cars, is where the bogie motors help maintain the speed of the train. A cable car transportation system runs all along the tunnel of this platform and transports goods and people from section to section. Due to the borders between Third, Second, and First Class, the Sub-Train might actually be divided into three closed-loop subsystems for operating reasons (it is faster to operate small distance trips).