WEM

White Ensign Models AirStrike 700 1/700 Sikorsky S-55 (HO4S) Helicopter with Photo etch
Not the most attractive looking helicopter the Sikorsky S-55, better known in the US as the HO4S, has a distinctive "tadpole" shape that will make a great little addition to your 50's carrier or airfield diorama. They come packaged 5 to a set with photo etch details included. There was little flash and only a small casting gate on the nose to sand off, my sample came nicely molded with very little touch up needed.	click to enlarge
This helo comes with photo etched rotors wheels, and tail stabilizers. The wheel centers are even visible due to the relief etching on the parts.
Basic instructions are provided to show how the parts fit. They could benefit from having exact locations for the etched parts to attach to. A simple elevation view of the Helicopter would be a big plus.
White Ensign has a very complete line of aircraft in their 1/700 Scale airstrike line that should allow you to model any carrier at any time period desired. Check out the complete list on their website.