Heavy lift helicopters are specialized aircraft designed to transport large and heavy loads that standard helicopters cannot carry. They are commonly used in industries such as construction, oil and gas, and disaster relief. These helicopters can lift payloads ranging from several tons to over 20 tons, making them essential for moving equipment and materials to remote or hard-to-reach locations. Some well-known models of heavy lift helicopters include the Sikorsky CH-53 Sea Stallion and the Mil Mi-26. These helicopters are equipped with powerful engines and advanced rotor systems, allowing them to perform efficiently in various conditions. Their versatility makes them valuable assets in both military and civilian operations.