Avro Canada CF-103
... that design work on the Avro Canada CF-103 began before the aircraft it was supposed to replace entered service?
... that design work on the <b id="mwBwk"><a href="./Avro_Canada_CF-103" id="mwBwo" rel="mw:WikiLink" title="Avro Canada CF-103">Avro Canada CF-103</a></b> began before the aircraft it was supposed to <a class="mw-redirect" href="./CF-100_Canuck" id="mwBws" rel="mw:WikiLink" title="CF-100 Canuck">replace</a> entered service?