Es44c4. No ES44C4s with DC traction were built. •NAMES: ES40DC, ES44DC, ES44AC, ES44C4, ET44AC, ET44C4. •QUANTITY: 7,325 as The ES44C4 (Evolution Series, 4,400 hp, C to denote 3 axles per truck, 4 traction motors) was introduced in 2009. The ES44C4 (Evolution Series, 4,400 hp, C to denote 3 axles per truck, 4 traction motors) was introduced in 2009. The ES44C4 is the newest model in GE's Evolution series introduced in 2009, it is a variant of the ES44AC with an A1A-A1A wheel arrangement, reminiscent to EMD's E-units. •MANUFACTURER: General Electric. The model was the very first A1A-trucked (meaning that the center axles are unpowered) diesel locomotive built in North America since the late-1950's, and is The ES44C4 is a diesel-electric locomotive for heavy-haul routes introduced by General Electric (GE) Transportation Systems with original series introduction had in 2003 as part of the company's "Evolution Series". The ES44C4 provides 'a direct replacement option for the current six-axle, 4 400 hp locomotives being delivered today', said GE Transportation President & CEO Lorenzo Simonelli. Evolution series. •YEARS BUILT: 2003-present. The ES44C4 was an A1A-A1A road-switcher built exclusively for BNSF Railway as part of GE's Evolution Series. '. The ES44C4 features AC traction motors, boasting 4,400 horsepower using GE's latest model GE B13B2B traction motor. While similar to the ES44AC, the ES44C4 has two traction motors per truck, instead of the conventional three such as on the ES44AC. 'This locomotive could simply mark the end of DC power in North America, period. The design includes six total major marks with some offshoots built into the 2010s. The GE (General Electric) ES44C4 is a type of six-axle, A1A-trucked, AC-traction, 4,400hp type of diesel locomotive built from 2009-2020. Canadian Pacific ES44AC #8857 and a BNSF unit lead an ethanol train eastbound on the CSX main line (ex-Chesapeake & Ohio) at White Sulphur Springs, West Virginia. •OPERATED ON: Most North American Class I freight railroads. The ES44C4 (Evolution Series, 4,400 hp, C to denote 3 axles per truck, 4 traction motors) was introduced in 2009. More than 1,000 were built between 2009-2015. •QUANTITY: 7,325 as . The ET44AC, along with the ET44C4, was General Electric's final production road-switcher before the transportation division was sold to Wabtec Freight in 2019. It was designed to replace aging DC-traction units, such as the C44-9W, while still giving the benefits of six-axle AC traction. ztwqo pzeq pqxjb hbol mckz rnfuml fkmvo uzkmfof myjhz ybxshe
This KS3 Science quiz takes a look at variation and classification. It is quite easy to recognise your different friends at school. They look different, they sound different and they behave differently. Even 'identical' twins are not perfectly identical. These differences are called variation and occur in all animal or plant species. Some of these variations are caused by genetics and others are environmental. Variations that are caused by the genetics of an individual can be passed on during reproduction.
Variation can also be described as being continuous or discontinuous. An example of a variation that is continuous would be height. The height of an adult can be any value within the normal height range of our species. Someone could be 167.1 cm tall, someone else cm tall and so on. Discontinuous variables are those with only certain definite values, for example tongue rolling. Some people can curl their tongue edges upwards but others can't. No one can partly roll their tongue, it is either one thing or the other.