Engineering:Rihn DR-107 One Design

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Short description: American homebuilt aerobatic aircraft
DR-107 One Design
Dan Rihn DR.107 One Design G-RIHN at Compton Abbas (9047962359).jpg
DR-107 at Compton Abbas Airfield
Role Homebuilt aircraft
National origin United States
Manufacturer Aircraft Spruce & Specialty
Designer Dan Rihn
First flight 1993
Status Plans and kits available (2013)
Number built at least 56 (2013)
Variants Rihn DR-109

The Rihn DR-107 One Design is an American aerobatic homebuilt aircraft that was designed by Dan Rihn and first flown in 1993. The aircraft is supplied by Aircraft Spruce & Specialty of Corona, California in the form of plans and a materials kit for amateur construction.[1]

The DR-107 was designed as a low-cost one design aircraft for competition and sport basic to advanced aerobatics, including International Aerobatic Club Class One competitions. For this role it is stressed to +/-10g.[1]

Design and development

The DR-107 is a monoplane that features a cantilever low-wing, a single-seat enclosed cockpit under a bubble canopy, fixed conventional landing gear with wheel pants and a single engine in tractor configuration.[1]

The aircraft is predominantly made from wood, with some steel parts and doped aircraft fabric. Its 19.50 ft (5.9 m) span wing employs a Wainfan 16% symmetrical airfoil and has a wing area of 75.55 sq ft (7.019 m2). The wing has almost full-span ailerons that produce rolls of 360° per second. The wing has no flaps. Other features include a low-mounted cable-braced tailplane and a 24 in (61.0 cm) wide cockpit.[1][2]

The DR-107 can accept engines of 160 to 180 hp (119 to 134 kW). The standard engines used are the 180 hp (134 kW) Lycoming O-360, modified with high compression pistons, an inverted oil system and fuel injection or the 160 hp (119 kW) Lycoming AEIO-320 powerplant.[1]

The aircraft has an empty weight of 740 lb (340 kg) and a gross weight of 1,150 lb (520 kg), giving a useful load of 410 lb (190 kg). With full fuel of 19 U.S. gallons (72 L; 16 imp gal) the payload is 296 lb (134 kg).[1]

The designer estimates the construction time from the supplied materials kit as 2000 hours.[1]

Operational history

By 1998 the company reported that 355 kits had been sold and five aircraft were flying.[1]

In November 2013 33 examples were registered in the United States with the Federal Aviation Administration, with another 11 previously registered and now removed.[3] Also in November 2013 there were two registered with Transport Canada and ten in the United Kingdom with the Civil Aviation Authority.[4][5]

Specifications (DR-107)

Rihn DR-107 One Design

Data from AeroCrafter and Lednicer[1][2]

General characteristics

  • Crew: one
  • Length: 17 ft 0 in (5.18 m)
  • Wingspan: 19 ft 6 in (5.94 m)
  • Wing area: 75.55 sq ft (7.019 m2)
  • Airfoil: Wainfan 16% symmetrical
  • Empty weight: 740 lb (336 kg)
  • Gross weight: 1,150 lb (522 kg)
  • Fuel capacity: 19 U.S. gallons (72 L; 16 imp gal)
  • Powerplant: 1 × Lycoming AEIO-320 four cylinder, air-cooled, four stroke aircraft engine, 160 hp (120 kW)
  • Propellers: 2-bladed constant speed propeller

Performance

  • Maximum speed: 184 mph (296 km/h, 160 kn)
  • Cruise speed: 160 mph (260 km/h, 140 kn)
  • Stall speed: 63 mph (101 km/h, 55 kn)
  • Range: 375 mi (604 km, 326 nmi)
  • Service ceiling: 22,000 ft (6,700 m)
  • g limits: +/-10 g
  • Rate of climb: 2,000 ft/min (10 m/s)
  • Wing loading: 15.22 lb/sq ft (74.3 kg/m2)

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 107. BAI Communications, 15 July 1998. ISBN:0-9636409-4-1
  2. ↑ 2.0 2.1 Lednicer, David (2010). "The Incomplete Guide to Airfoil Usage". http://www.ae.illinois.edu/m-selig/ads/aircraft.html. Retrieved 29 November 2013. 
  3. ↑ Federal Aviation Administration (29 November 2013). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=DR-107&PageNo=1. Retrieved 29 November 2013. 
  4. ↑ Transport Canada (29 November 2013). "Canadian Civil Aircraft Register". Archived from the original on July 18, 2011. https://web.archive.org/web/20110718042755/http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp. Retrieved 29 November 2013. 
  5. ↑ Civil Aviation Authority (United Kingdom) (29 November 2013). "GINFO Search Results Summary". http://www.caa.co.uk/application.aspx?catid=60&pagetype=65&appid=1&mode=summary&aircrafttype=DR107. Retrieved 29 November 2013. 

External links



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