UFOs A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Skyhook, Project Skyhook balloon being prepared for launch from a navy vessel A secret US Navy program of the late 1940s to develop giant balloons for carrying out photoreconnaissance over the Soviet Union. Launched partially inflated, Skyhooks expanded as they rose until they reached their maximum size of up to 600 ft. tall and 100 ft. in diameter at an altitude of 60,000 ft. Almost certainly, they were behind many UFO sightings in post-War years, including the UFO chased, with fatal consequences, by Air Guard Captain Thomas Mantell. Related entries    • Cold War, linked to UFO reports    • Mogul, Project Related category    • UFOs Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP