Model Power - 3414 - Tank Car, Triple Dome, 40 Foot - Mobil Oil

Model Information: This car was first produced by Mehano in the late 1960s or early 1970s. It is essentially a knock-off of the Atlas/Roco 3-dome model from 1967. It was imported by MRC, Model Power and Life-Like. Life-Like later produced a Chinese knock-off of this car. Hence the Life-Like model is a knock-off of a knock-off. Meta-knockoff?

Prototype History: Triple Dome tank cars, while not as common as single-domes, are a railroad staple. They have been around since the first half of the 20th century.

The dome above tank cars serves as an expansion chamber as temperature affects the volume of any liquids contained within. With no dome, if the liquid did not 100% fill the tank, then it is possible for the liquid to slosh around inside the tank, causing instability and increasing the possibility of a derailment. The dome allows the tank to be slightly overfilled so that should the volume in the main section decrease due to colder temperatures or even a small leak, that there will still be sufficient liquid within to prevent sloshing. Similarly if temperature increases, the liquid can rise up inside the dome preventing excess pressure within the tank. While not as serious as an underfilled tank, an over-pressurized tank might present problems during unloading.

If you see three domes on a tank car it is because there are three separate compartments inside the tank car each containing a different liquid. This was desirable for many reasons.

Often times a delivery would consist of much less than a carload (LCL) of liquid. Remember the sloshing problem? So if you only had to fill a third of a tank with your commodity, then you can avoid the issue by using one of the three chambers within the tank car. Also, you might have several grades of a commodity to deliver such as unleaded, leaded and diesel fuel and you need them to be kept separate. Or you might be producing wine and you want your white wine kept separate from your red wine. Or maybe all three chambers had the same contents but were being delivered to three different customers. It can be very difficult to determine when one third of a single dome tank car has been discharged...

For all these reasons, three-dome tank cars were a common sight in the first half of the 20th century. However, with the rise of the interstate highway system and the modern trucking industry, LCL deliveries have primarily been accomplished with tanker trucks instead of tank cars and the three-dome tank car has gradually disappeared from the North American rail network.

Road Name History: Mobil, previously known as the Socony-Vacuum Oil Company, is a major American oil company which merged with Exxon in 1999 to form a parent company called ExxonMobil. It was previously one of the Seven Sisters which dominated the global petroleum industry from the mid-1940s until the 1970s. Today, Mobil continues as a major brand name within the combined company, as well as still being a gas station sometimes paired with its own store or On the Run. The former Mobil headquarters in Fairfax County, Virginia, were used as ExxonMobil's downstream headquarters until 2015 when ExxonMobil consolidated employees into a new corporate campus in Spring, Texas.

From Wikipedia

Brand/Importer Information: Founded in the late 1960's by Michael Tager, the 3rd generation business specializes in quality hobby products serving the toy and hobby markets worldwide. During its 50 years of operation, Model Power has developed a full line of model railroading products, die-cast metal aircraft, and die-cast metal cars and trucks.

In early 2014, Model Power ceased its business operations. Its extensive portfolio of intellectual property and physical assets are now exclusively produced, marketed, sold, and distributed by MRC (Model Power, MetalTrain and Mantua) and by Daron (Postage Stamp Airplanes and Airliner Collection).

Manufacturer Information: Mehano is a Slovenian toy manufacturer located in Izola, Slovenija. The company was founded as Mehanotehnika and was producing toys starting in June 1953. They first exhibited at the Nuerenberg Toy Fair in 1959. Mehano produced a number of different locomotives and rolling stock models for the North American market in the 1960s and 1970s. Companies such as Atlas and Life-Like imported a huge variety of their products. Generally they can easily be recognized as they are stamped "Yugosolavia" on the underframe. The company was formally renamed "Mehano" in 1990. Izola today is part of the country of Slovenia since the breakup of Yugoslavia.
Mehano filed for bankruptcy in 2008, but still continued to exist and operate. Since 2012, Mehano products are distributed by Lemke.