By the glossary definition, with a Useful Load of 486 lb (220 kg), the Empty Weight is calculated to be approximately 369 kg.
Design authority: Robinson Helicopter Company
Primary manufacturer: Robinson Helicopter Company
Parent type: Robinson R22
Aircraft status: Operational
VTOL type: Helicopter
Lift devices: 1 Single main rotor
Dedicated control device: 1 Tail rotor
Crew required: 1 in Side-by-side arrangement
Landing gear: Skids