The The XRON-I Rotorcycle or YRON-I Rotorcycle (originally designated HOG) was a tiny single-seat helicopter designed under contract for the U.S. Navy. in the mid 1950s. It later was designed for a United States Marine Corps requirement for a small personal helicopter that would fulfill a number of roles including observation liaison small unit tactical maneuvers and which could be dropped to downed airmen behind enemy lines to facilitate their escape.
Made by Gyrodyne Company of America.
It is the successor of the Gyrodyne Model 2C .