TandemMouse Helicopter By Don Hillberg

Hillberg TandemMouse Helicopter

Don Hillberg’s TandemMouse Helicopter Plans

Rotormouse helicopter workshop

We are still trying to gather more information on the TandemMouse Helicopter from Don Hillberg of Ventura, C.A. Please contact us if you can assist. Don has described it as a Cobra 1/2 scale helicopter as seen in the following photos not yet fitted with it’s transmission.

TYPE: EH 1-02 TandemMouse: Tandem two-seat version; under development; was due to fly 1999; this date slipped, but this version is believed to have flown by early 2001. Powered by 112kW Solar T62-T32 turbine engine. Provisional information appear below.


FLYING CONTROLS: Auto-governed hydro-mechanical flying controls. Optional rotor brake.

STRUCTURE: Aluminium alloy (2024-T3) monocoque fuselage, bulkheads and keel; stainless steel engine deck and firewall.

LANDING GEAR: Fixed steel cross-tube skid type.

SYSTEMS: 24V 60A electrical system; Electrocraft alternator.

EQUIPMENT: Optional cargo hook.

TYPE: EH 1-02A

Development of EH 1-02: has 313kW Rolls-Royce 250-C20B with 681 liter fuel tank.

TandemMouse Helicopter Front Left View

TandemMouse Helicopter Airframe Body Work

Tandemmouse helicopter cockpit controls

TandemMouse Helicopter Front View

Don Hillberg experimental helicopter designs


All photos courtesy Don Hillberg.


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