The Blue Scout I was a three-stage rocket derived from the Scout X-1. All three launches occurred from Launch Complex 18B at the Cape Canaveral Air Force Station. The first two launches were conducted on 7 January and 9 May 1961 respectively. They both carried HETS A1plasma research experiments on suborbital trajectories. The third launch was conducted on 12 April 1962, with a payload that was intended to investigate atmospheric reentry.
The first launch was successful, however recovery of the payload failed. Both other launches failed due to problems with the Blue Scout.
The Blue Scout II was a four stage derivative of the Blue Scout I. It was flown three times in 1961, twice with HETS payloads, and once with the Mercury-Scout 1 satellite.