Not WW2 ... Produced between 1955 and 1962

Allso the sentance under the title makes no sence.

this experimental plane would obviously be a logistical nightmare if it was used in place of a parachute on a plane going down. its real use was as a rescue plane that could be dropped in a crate behind enemy lines, altho it never went in to production.

Too bad there's nowhere for the site admin to look up the details in under 10 seconds and get them right.
You know, sort of an online encyclopedia.
http://en.wikipedia.org/wiki/Goodyear_Inflatoplane