Avro Canada
The RCAF purchased 30 KDA-4 Firebees, which were flown from two specially converted Avro Lancaster Mk.10DC Drone Carriers from 1956 to 1961. These were used to test the weapons system for the Avro Canada CF-100 and Avro Canada CF-105 Arrow. The cancellation of the latter brought the drone program to an end as it was no longer needed for the Sparrow II missile that would have armed the Arrow.