 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 . The Mark 2A and Mark 3 were also to have updated engines , capable of producing 39 @,@ 800 lbf ( 177 kN ) each , increasing the maximum take off weight by 7 @,@ 700 kg ( 17 @,@ 000 lb ) and flight ceiling to 70 @,@ 000 ft . 
