Thanks for the correction Dave.

We meant to say the same design origins, given the prototype of the Wirraway first flew in 1937 and entered production in 1939 (must have been a test series on) whereas the Yale didn’t enter production as the Yale until 1940 as stated.
Interestingly, and we didn’t know this, but the NA64 aka the Yale was an upgraded version of the pre war French order of the NA57 which first flew in 1937. So close and so similar but we’ll make the necessary corrections.

thanks