Rihn DR-107 "One Design"
American homebuilt aerobatic aircraft
From Wikipedia, the free encyclopedia
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]
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| DR-107 "One Design" | |
|---|---|
| DR-107 at Compton Abbas Airfield | |
| General information | |
| Type | Homebuilt aircraft |
| National origin | United States |
| Manufacturer | Aircraft Spruce & Specialty |
| Designer | Dan Rihn |
| Status | Plans and kits available (2013) |
| Number built | at least 56 (2013) |
| History | |
| First flight | 1993 |
| Variant | Rihn DR-109 |
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]
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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.
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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] By August 2024, ten were registered in Australia with the Civil Aviation Safety Authority (including nine recorded as DR-107 One Design[6] and one recorded as One Design[7]); it is unknown how many are registered with Recreational Aviation Australia. As of April 2026 there are three registered in Brazil[8] and one in Argentina[9] as LV-X326.
