Engineering:Brock KB-3
| KB-3 | |
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| Role | Autogyro |
| National origin | United States |
| Manufacturer | Ken Brock Mfg |
| Designer | Ken Brock |
| Introduction | 1985 |
| Status | Production completed |
| Produced | 1985-2005 |
| Number built | 200 (2005) |
| Developed from | Brock KB-2 |
The Brock KB-3 is an American autogyro that was designed by Ken Brock, produced by Ken Brock Mfg and introduced in 1985. The aircraft was supplied as a kit for amateur construction and was also available as plans.[1][2]
Design and development
The KB-3 was derived from the 1970 KB-2 and specifically designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 254 lb (115 kg). The aircraft has a standard empty weight of 250 lb (113 kg). It features a single main rotor, a single-seat open cockpit without a windshield, tricycle landing gear and a twin cylinder, liquid-cooled, two-stroke, dual-ignition 64 hp (48 kW) Rotax 582 engine in pusher configuration.[1]
The aircraft fuselage is made from bolted-together aluminum tubing. Its 22 ft (6.7 m) diameter rotor has two blades. Factory available options included a main rotor pre-rotator, a rotor brake and an instrument package. Fuel capacity is 5 U.S. gallons (19 L; 4.2 imp gal) and is housed in a combination pilot seat/fuel tank.[1]
Due to its small size and light weight the KB-3 is easy to transport by trailer and can be set up to fly in ten minutes.[1]
Specifications (KB-3)
Data from Cliche and Kitplanes[1][2]
General characteristics
- Crew: one
- Length: 12 ft 0 in (3.66 m)
- Empty weight: 250 lb (113 kg)
- Gross weight: 600 lb (272 kg)
- Fuel capacity: 5 U.S. gallons (19 L; 4.2 imp gal)
- Powerplant: 1 × Rotax 582 twin cylinder, liquid-cooled, two-stroke dual-ignition aircraft engine, 64 hp (48 kW)
- Main rotor diameter: × 22 ft 0 in (6.71 m)
- Main rotor area: 380 sq ft (35 m2)
Performance
- Maximum speed: 63 mph (101 km/h, 55 kn)
- Cruise speed: 60 mph (97 km/h, 52 kn)
- Range: 100 mi (160 km, 87 nmi)
- Service ceiling: 10,000 ft (3,000 m)
- Rate of climb: 1,200 ft/min (6.1 m/s)
- Disk loading: 1.58 lb/sq ft (7.7 kg/m2)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page F-3. Cybair Limited Publishing, 2001. ISBN:0-9680628-1-4
- ↑ 2.0 2.1 Downey, Julia: 2005 Trikes 'Chutes and Rotorcraft Directory, Kitplanes, Volume 22, Number 2, February 2005, page 57. Belvoir Publications. ISSN 0891-1851
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