Sprectrum's first product was the RX-28 Beaver, a single-seat, high wing ultralight aircraft powered by a 28 hp (21 kW) Rotax 277 single cylinder, two stroke powerplant.
It was introduced in 1983 and gained quick popularity in Canada and the USA.
The following year the RX-28 was joined in production by the RX-35, which used the 35 hp (26 kW) Rotax 377 engine.

In 1986 the company started production of a two-seat version of the Beaver, designated the RX 550 and powered by a Rotax 503 50 hp (37 kW) engine.
This model proved very popular as both a trainer and for private use and propelled the company into the forefront of ultralight aircraft production in North America.

In 1991 the company introduced the RX-650 Beaver, intending to market it in the then-newly introduced Canadian Advanced Ultra-light Aeroplane (AULA) category that allows passenger carrying.
The aircraft proved to have structural issues that caused Transport Canada to remove it from the AULA list.
The company went out of business in 1992, before rectifying the deficiencies in the RX-650's design.
Sprectrum's first product was the RX-28 Beaver, a single-seat, high wing ultralight aircraft powered by a 28 hp (21 kW) Rotax 277 single cylinder, two stroke powerplant. It was introduced in 1983 and gained quick popularity in Canada and the USA. The following year the RX-28 was joined in production by the RX-35, which used the 35 hp (26 kW) Rotax 377 engine.
In 1986 the company started production of a two-seat version of the Beaver, designated the RX 550 and powered by a Rotax 503 50 hp (37 kW) engine. This model proved very popular as both a trainer and for private use and propelled the company into the forefront of ultralight aircraft production in North America.
In 1991 the company introduced the RX-650 Beaver, intending to market it in the then-newly introduced Canadian Advanced Ultra-light Aeroplane (AULA) category that allows passenger carrying. The aircraft proved to have structural issues that caused Transport Canada to remove it from the AULA list. The company went out of business in 1992, before rectifying the deficiencies in the RX-650's design.
Spectrum Aircraft