The American Aircraft Penetrator was modified from a helicopter produced by what nation's military?
Bell UH-1 Iroquois The Bell UH-1 Iroquois (nicknamed "Huey") is a utility military helicopter powered by a single turboshaft engine, with two-blade main and tail rotors. The first member of the prolific Huey family, it was developed by Bell Helicopter to meet a United States Army's 1952 requirement for a medical evacuation and utility helicopter, and first flew in 1956. The UH-1 was the first turbine-powered helicopter to enter production in 1960 for the United States military, and more than 16,000 have been built since.
Yamaha R-MAX The Yamaha R-MAX is a Japanese unmanned helicopter developed by the Yamaha Motor Company in the 1990s. The two-bladed, gasoline-powered aircraft is remote-controlled by a line-of-sight user; it was designed primarily for agricultural use, and is capable of precise aerial spraying of crops. The R-MAX has been used in Japan and abroad for agriculture and a variety of other roles, including reconnaissance, disaster response and technology development.