The series started with the Hoffmann H36 Dimona, a touring motorglider introduced in the early 1980s. The aircraft were initially produced by Hoffmann Flugzeugbau, which became HOAC Flugzeugwerk and later Diamond Aircraft Industries.[2][5][6][9]
Built entirely from fibreglass, the H36 family all use a Wortmann FX 63-137 airfoil. The wings feature top-surface Schempp-Hirth-style airbrakes. Optionally, the wings can be folded by two people in a few minutes to allow storage. The original H36 has 16.0m (52.5ft) wings, while the later members of the family added slightly greater span. The H36 offers a 27:1 glide ratio, while later variants improved that by one point, to 28:1 by adding winglets increasing the span to 16.33m (53.6ft). Cockpit accommodation seats two in side-by-side configuration, under a hinged bubble canopy that is pushed up and backwards.[1][2][3][4][5][10]
The series are type certified in Europe and North America. The H36 received its US Federal Aviation Administration certification on 9 July 1986. Due to its fibreglass construction, the US certification includes the restriction "All external portions of the glider exposed to sunlight must be painted white except of (sic) wing tips, nose of fuselage and rudder."[6][7]
In March 1987 an improved variant was developed by Dieter Köhler and the subsequent HK36R first flew with a Limbach L2400 engine in October 1989.
When equipped with the larger available engines, particularly the 86kW (115hp)Rotax 914 turbocharged powerplant, the aircraft can be used for glider towing. A commercial success, more than 900 H36s and HK36s have been completed.[8]
The HK36 provided the basis from which the Diamond DV20 Katana from which the improved DA20 and four-seat DA40 series were later developed.[9]
Operational history
In 1991, an HK36, flown by Peter Urach in Austria, set an absolute altitude record in its class for a piston engined aircraft of 36,188ft (11,030m). The record held until surpassed in 2002 by the Bohannon B-1.[11]
The FCD (Fuel Cell Demonstrator) was a project led by Boeing that used a Diamond HK36 Super Dimona motor glider as a testbed for a fuel cell-powered light airplane research project. The project achieved level flight using fuel cells only in February and March 2008.[12][13]
In December 2016 there were nine H36s and thirty HK36s registered with the US FAA, two HK36Rs and two HK36TTSs registered with Transport Canada, along with seven H36s and eight HK36s registered with the UK Civil Aviation Authority.[14][15][16]
Variants
H36 Dimona
Original version produced by Hoffmann and later by HOAC, with a 16.0m (52.5ft) wingspan, conventional landing gear, 27:1 glide ratio and powered by a Limbach L2000 EB1C engine of 60kW (80hp), a Rotax 912A of 60kW (80hp) or Limbach L2400 EB of 65kW (87hp). Applied for US FAA certificate on 4 April 1982 and received on 9 July 1986 in the utility category at a gross weight of 770kg (1,698lb).[2][5][6]
HK36 R Super Dimona
Developed from the H36, with a carbon-fibre spar, modified fuselage, 16.2m (53.1ft) wingspan and 60kW (80hp) Rotax 912A engine. Optional wing tips can extend the span to 17.6m (57.7ft). Received US FAA type approval on 23 July 1993 in the utility category at a gross weight of 770kg (1,698lb).[2][6]
HK36TS Super Dimona
Developed from the HK36 R Super Dimona, the HK36TS has a 60kW (80hp) Rotax 912 A3 engine, 16.6m (54.5ft) wingspan, 28:1 glide ratio and conventional landing gear. Received US FAA type approval on 25 September 1997 in the utility category at a gross weight of 770kg (1,698lb). Marketed as the Katana Xtreme in Canada and the USA.[7]
HK36TC Super Dimona
The HK36TC has a 60kW (80hp) Rotax 912 A3 engine. Received US FAA type approval on 25 September 1997 in the utility category at a gross weight of 770kg (1,698lb). Marketed as the Katana Xtreme in Canada and the USA.[1][3][7][8]
HK36TC-100 Super Dimona
The HK36TC-100 has a 74kW (99hp) Rotax 912 S3 engine. Applied for US FAA type approval on 16 January 2003 and received on 12 January 2004 in the utility category at a gross weight of 770kg (1,698lb).[7] Minimum sink rate: 1.18 m/s at 97 km/h, glide ratio 1:27 at 105 km/h[17] Marketed as the Katana Xtreme in Canada and the USA.[7]
HK36TTS Super Dimona
The HK36TTS has an 86kW (115hp) Rotax 914 F3 or F4 turbocharged engine, a Muhlbauer MTV-21-A-C-F/CF 175-05 propeller, 16.6m (54.5ft) wingspan, 28:1 glide ratio, and conventional landing gear. Received US FAA type approval on 25 September 1997 in the utility category at a gross weight of 770kg (1,698lb). Marketed as the Katana Xtreme in Canada and the USA.[1][3][7][8]
HK36TTC Super Dimona
The HK36TTC has an 86kW (115hp) Rotax 914 F3 or F4 turbocharged engine, 16.6m (54.5ft) wingspan, 28:1 glide ratio, and tricycle landing gear. Received US FAA type approval on 25 September 1997 in the utility category at a gross weight of 770kg (1,698lb). Marketed as the Katana Xtreme in Canada and the USA.[1][3][7][8]
HK36TTC Eco Dimona
Special mission version of the HK36 for the surveillance role, it is equipped with a gimbal-mounted Wescam camera and cockpit display, an 86kW (115hp) Rotax 914 F3 or F4 turbocharged engine and a Muhlbauer MTV-21-A-C-F/CF 175-05 propeller. Received US FAA type approval on 29 March 1999 in the utility category at a gross weight of 770kg (1,698lb) and 21 December 2000 in the restricted category, limited to aerial photography only, at a gross weight of 930kg (2,050lb). Marketed as the Multi Purpose Xtreme in Canada.[7][8]
Diamond DA36 E-Star
Developed by Siemens, EADS and Diamond Aircraft to reduce fuel consumption and emissions by up to 25 percent, using a serial hybrid drive that turns the aircraft's prop with a Siemens 70kW (94hp) electric motor, from power generated by a 40hp (30kW) Austro Engines Wankel rotary engine and generator, stored in batteries. The prototype first flew 8 June 2011.[18]
Hoffmann H38 Observer
A surveillance aircraft largely based on the H36 Dimona which failed to enter flight testing due to failure of the partnership between Wolf Hoffmann and Hoffmann Flugzeugbau.[citation needed]
Federal Aviation Administration (13 December 2016). "Make / Model Inquiry Results". Archived from the original on 20 December 2016. Retrieved 13 December 2016.
Civil Aviation Authority (United Kingdom) (13 December 2016). "GINFO Search Results Summary". Archived from the original on 20 December 2016. Retrieved 13 December 2016.
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