The Sikorsky CH-53E Super Stallion is a heavy-lift helicopter operated by the United States military.As the Sikorsky S-80, it was developed from the CH-53 Sea Stallion, mainly by adding a third engine, adding a seventh blade to the main rotor, and canting the tail rotor 20°.It was built by Sikorsky Aircraft for the United States Marine Corps.The less common MH-53E Sea Dragon fills the United …

https://en.wikipedia.org/wiki/Sikorsky_CH-53E_Super_Stallion