19K views · 738 reactions | Watch how the CH-53K’s blades fold, making it easy to transport the helicopter by sea, air or land.The Sikorsky CH-53K King Stallion is the largest and heaviest helicopter in the U.S. military, currently being developed by Sikorsky Aircraft for the United States Marine Corps (USMC). | Military Leak | Facebook

76K views · 1.3K reactions | The U.S. Marine Corps CH-53K King Stallion is the most powerful helicopter in the United States military. Sikorsky Test Pilot, Sean Maloney, walks you through some key features of this heavy-lift workhorse. | Sikorsky | Facebook

The Sikorsky CH-53E Super Stallion is a heavy-lift helicopter operated by the United States military. It was developed from the CH-53 Sea Stallion. | War History Online

#OTD in 1968, Marine Lt. Col. Robert Guay and Sikorsky pilot Byron Graham performed a series of loops and rolls in a CH-53A to test the enormous Sea Stallion's maneuverability characteristics. The maneuvers were unprecedented for a helicopter of its size. | U.S. Naval Institute