CIGNYS has designed and supplied Ground Handling Wheels for both commercial and military helicopter applications.  The lever operated AB-2578 Helicopter Dolly his used to support the MD Helicopter (formerly Hughes) MD-500 Light Helicopter.  The 61788-1 Heavy Duty set of Ground Handling Wheels is operated by a ratchet jack handle to lift the helicopter off the ground and is used on the MD-530G Military Helicopter.