 Avro Canada had a wide range of advanced Arrow variants under development at the time of project cancellation.Frequent mention is made of an Arrow that could have been capable of Mach 3, similar to the Mikoyan-Gurevich MiG-25.This was not the production version, but one of the design studies, and would have been a greatly modified version of the Arrow Mk 2, featuring revised engine inlets and extensive use of carbon steel and titanium to withstand airframe heating.