The BAe 146/Avro RJ belongs to the category of medium-sized aircraft. This aircraft was produced by British Aerospace (later changed to BAE Systems). The production line of this plane started in 1983 and stopped in 2002. The upgraded production of this aircraft, known by the code AVRO RJ, also began in 1992. Of course, a model with new engines and upgraded avionics with the AVRO RJX code was also introduced in 1997, but only two prototypes and one car of this model were produced. With 387 produced, the BAe 146/Avro became the UK's most successful civilian aircraft. The BAe 146/Avro RJ is a T-tail high-wing aircraft with 4 underwing turbofan engines and a retractable tricycle landing gear. In terms of sound production, this plane is a very quiet plane and is known as Whisperjet. It has the ability to operate in many small airports. The BAe 146/Avro RJ is known as a regional or short-range airliner. Many European companies such as Lufthansa, Brussels Airlines and Swiss International Air Lines choose and use this plane in their regional routes. The cargo model of this plane is known as QT or Quite Trader. (This content is copied from Tayareh's blog) The models of this aircraft are BAe 146-100/200/300 and RJ-70/85/100.

Real Photo:

Credit to @GuianLorenzo's for his original BAe-146 (Swiss Livery)
The logo and Persian writing and aircraft photos are made by @FoxtrotCharlieCharlieX