Interesting Fact: The CH-53 was the product of the U.S. Marines’ “Heavy Helicopter Experimental” (HH(X)) competition begun in 1962. Sikorsky‘s S-65 was selected over Boeing Vertol‘s modified CH-47 Chinook version. The prototype YCH-53A first flew on 14 October 1964. The helicopter was designated “CH-53A Sea Stallion” and delivery of production helicopters began in 1966. The first CH-53As were powered by two General Electric T64-GE-6 turboshaft engines with 2,850 shp (2,125 kW) and had a maximum gross weight of 46,000 lb (20,865 kg) including 20,000 lb (9,072 kg) in payload. ( https://en.wikipedia.org/wiki/Sikorsky_CH-53E_Super_Stallion#Specifications_(CH-53E) )
It was too cold for the birds today, but other kind of birds were out.
Interesting Fact: The Black Hawk UH-60L helicopter has been a mainstay of American armed forces since it entered service in 1978. Its flexible configuration, survivability, and maneuverability make it the medium utility helicopter of choice by military forces around the world. The UH-60L and its derivatives have amassed more than 5 million flight hours, including casualty evacuations, troop transports, and search-and-rescue missions. ( http://science.howstuffworks.com/black-hawk.htm )