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.[1][2][3]

Bristell NG 5
Role Ultralight aircraft
National origin Czech Republic
Manufacturer BRM Aero
Designer Milan Bristela
Introduction 2010
Status In production
Number built 42 (September 2011)

The aircraft was introduced at the AERO Friedrichshafen 2011 show, where the retractable gear version was shown.[3][4][5]

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.[1][2][3]

The aircraft is made from aluminium and features a 130 cm (51 in) wide cabin at the shoulder, with a bubble canopy over the cockpit. The wings feature flaps. The standard engine is a 60 kW (80 hp) Rotax 912UL, with the 75 kW (101 hp) Rotax 912ULS, the 71 kW (95 hp) ULPower UL260i/iS and the 88 kW (118 hp) ULPower UL350iS powerplants optional. The 115 hp (86 kW) Rotax 914, 85 hp (63 kW) Jabiru 2200 and 120 hp (89 kW) Jabiru 3300 are also available. Other engines are planned, particularly for the United States market. The aircraft has a notably high useful load of 279 kg (615 lb). The landing gear is of tricycle configuration.[1][3][4]

After 42 examples had been completed the aircraft was introduced into the US market in September 2011 at the AOPA Summit.[1]

Variants
Bristell NG 5 LSA
Bristell NG 5 UL
Base ultralight model with an 8.13 m (26.7 ft) wingspan and a gross weight of 472.5 kg (1,042 lb).[2][4]
Bristell NG 5 HD
Heavy duty model with an 8.13 m (26.7 ft) wingspan, heavier duty wing spars and a gross weight of 600 kg (1,323 lb).[2]
Bristell NG 5 LSA
Model for the US light-sport aircraft category with an 9.13 m (30.0 ft) wingspan and a gross weight of 600 kg (1,323 lb).[2][3][4]
Bristell NG 5 RG
Rectractable gear model with an 9.13 m (30.0 ft) wingspan and a gross weight of 600 kg (1,323 lb).[2][3][4]

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."[6] The company has contested the CASA notice and claims that spin testing was conducted, although the manufacturer prohibits the design from intentional spins.[7] 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."[8]

Specifications (Bristell UL)

Data from AVweb and company website[1][2]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 6.45 m (21 ft 2 in)
  • Wingspan: 8.13 m (26 ft 8 in)
  • Height: 2.28 m (7 ft 6 in)
  • Wing area: 10.5 m2 (113 sq ft)
  • Empty weight: 290 kg (639 lb)
  • Gross weight: 472.5 kg (1,042 lb)
  • Fuel capacity: 120 litres (26 imp gal; 32 US gal)
  • Powerplant: 1 × Rotax 912ULS , 75 kW (100 hp)

Performance

  • Cruise speed: 214 km/h (133 mph, 116 kn)
  • Stall speed: 52 km/h (32 mph, 28 kn) flaps down
  • Never exceed speed: 270 km/h (170 mph, 150 kn)
  • g limits: +4/-2
  • Wing loading: 45 kg/m2 (9.2 lb/sq ft)

See also

Aircraft of comparable role, configuration, and era

References
  1. Grady, Mary (September 2011). "A New LSA: Bristell From Liberty Sport Aviation". AVweb. Retrieved 23 September 2011.
  2. BRM Aero (2020). "Bristell Classic". Retrieved 25 March 2020.
  3. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 36. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  4. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 34. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  5. "ТП-5 Plane". BRM aero. 2011-12-13. Archived from the original on 2012-09-06. Retrieved 2011-12-13.
  6. "Safety Notice for Pilots and Operators of Bristell Light Sport Aircraft" (PDF). casa.gov.au. Archived (PDF) from the original on 9 June 2020. Retrieved 4 June 2020.
  7. "BRM hits back over CASA Stall Ban". Australian Flying. 16 March 2020. Archived from the original on 2 July 2020. Retrieved 5 July 2020.
  8. Civil Aviation Safety Authority (28 February 2020). "Bristell stall and spin warning". casa.gov.au. Archived from the original on 3 April 2020. Retrieved 5 July 2020.
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