| Hillberg Rotermouse EH 1-01 1997 |  |
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| Hillberg Rotermouse EH 1-01 1997 | |
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Company founded 1990 to provide maintenance and modification services to helicopter operators, and moved into kit and experimental fields to help builders. Hillberg has also developed the four-seat 1-04, which awaits funding for production. Produces a retrofit kit for the RotorWay Exec, upgrading it to turbine power with a Solar T62-T32 of 112kW and reducing empty weight to 340kg; at least 13 delivered by October 2003. HILLBERG EH 1-01 ROTERMOUSE and EH 1-02 TANDEMMOUSE TYPE: Single-seat helicopter kitbuilt; two-seat helicopter kitbuilt. PROGRAMME: Design and construction of prototype began in August 1990; first flew (N10TE) August 1992. Construction of first production aircraft began in September 1996. Type is currently certified as experimental by FAA. CURRENT VERSIONS:
CUSTOMERS: By June 2002, 31 had been ordered, of which at least four had been built. COSTS: Kit: EH 1-01 US$68,000 (2003) ex-works US$100,000; EH 1-02 US$120,000; all prices encompass everything bar radio equipment (2003). DESIGN FEATURES: Forward fuselage resembles Bell AH-1 HueyCobra. Stub-wing behind cockpit for carriage of external loads. Main rotor speed 510rpm; tail rotor 3,250rpm. FLYING CONTROLS: Auto-governed hydromechamcal flying controls. Optional rotor brake. STRUCTURE: Aluminium alloy (2024-T3) monocoque fuselage, bulkheads and keel; stainless steel engine deck and firewall. Rotor has Gyrodyne QH-50 modified blades of NACA 1200 aerofoil section with 8° twist and block tip caps. Modified Robinson R22 hub and transmission. Conventional tail rotor using aluminium-skinned blades. LANDING GEAR: Fixed steel cross-tube skid type; floats optional. POWER PLANT: One 108kW Honeywell 36-55-C turboshaft engine driving a non-folding, two-blade, semi-rigid wood-laminated main rotor. Engines in range 108-186kW are suitable. Single 125 litre crash-resistant bladder fuel tank around transmission; refuelling point behind main mast. Optional 76 litre fuel tank on stub-wing. EH 1-02 has 170 litre fuel capacity. ACCOMMODATION: Single pilot in enclosed cockpit. Entry through upward-hinged port and starboard side windows. Baggage compartment behind seat. SYSTEMS: 24V 60A electrical system; Electrocraft alternator. EQUIPMENT: Optional cargo hook. HILLBERG EH 1-04 Baby Huey TYPE: Four-seat helicopter kitbuilt. PROGRAMME: Work is continuing on a proposed development of RoterMouse/TandemMouse with four seats and external cabin styling resembling Bell UH-1 Huey. Max take-off weight 1,134kg. Jane's All the World's Aircraft, 2004-2005 In addition to helicopter maintenance and modification, Hillberg Helicopters offers the RotorMouse EH 1-01 as a single-seat turbine experimental-category helicopter for construction from a kit (first flown August 1993), RotorMouse EH 1-02 tandem two-seat version, and RotorMouse (Baby Huey) four-seater. Also built the T-4 Turbine as a four-seat turbine helicopter (not in production at time of writing), and produces a retrofit kit for the RotorWay Exec to provide a turbine engine (first flown 1997). D.Mondey "The New Illustrated Encyclopedia of Aircraft", 2000 Links: * * *
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