BRM Aero Bristell
The BRM Aero Bristell NG 5, now called the Bristell Classic, is a Czech low-wing, two-seat in side-by-side configuration, single engine in tractor configuration, ultralight and light-sport aircraft that was designed by Milan Bristela and is produced by BRM Aero. The aircraft is supplied as a complete ready-to-fly aircraft. The aircraft was introduced at the AERO Friedrichshafen 2011 show, where the retractable gear version was shown. Design and development. The aircraft was designed to comply with both European microlight rules and also the US light-sport aircraft regulations, by using  different versions for each regulatory environment. The aircraft is made from aluminium and features a wide cabin at the shoulder, with a bubble canopy over the cockpit. The wings feature flaps. The standard engine is a Rotax 912UL, with the Rotax 912ULS, the ULPower UL260i/iS and the ULPower UL350iS powerplants optional. The Rotax 914, Jabiru 2200 and Jabiru 3300 are also available. Other engines are planned, particularly for the United States market. The aircraft has a notably high useful load of . The landing gear is of tricycle configuration. After 42 examples had been completed, the aircraft was introduced into  the US market in September 2011 at the AOPA Summit. By 31 December 2020 the company reported over 600 had been delivered. Accidents and incidents. In February 2020, the Australian Civil Aviation Safety Authority released a safety notice advising of a number of fatal accidents globally involving spins and stalls of Bristell LSAs. The safety notice states "aircraft may not meet the LSA standards as it does not appear to have been adequately tested" and that "the manufacturer has been unable to provide satisfactory evidence that the design is compliant with the requirements of the ASTM standards applicable to light  sport aircraft." The company has contested the CASA notice and claims that spin testing was conducted, although the manufacturer prohibits the design from intentional spins. CASA indicated on 28 February 2020 that "further investigation and discussions with the manufacturer are ongoing and CASA will provide an update as new information becomes available."