#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

63K views · 279 shares | 364 landings and takeoffs, day and night, from all nine deck spots and in various wind conditions. The CH-53K King Stallion recently completed two weeks of sea trials aboard the USS Wasp. Learn More: https://lmt.co/34uZumq | Sikorsky | Facebook

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