Using my very hi-tech non-EQ graph paper, I sketched this pattern.
The purple blocks are the flying geese. The center block does not need to be a square in a square. It's just two FG blocks going in opposite directions. I think that would be easier for most people to do.
The four quadrants that I've colored with pink, orange and green are all HST's.
My hi-tech drawing is limited by the size of the paper, but it used 46 flying geese and 272 HST's.
If your HST's are 2" square finished, and your flying geese are 2" x 4" finished, you would need the following number of blocks:
46 FG + 280 HST = 34" square quilt (51" square with 3" HST's)
58 FG + 428 HST = 42" square quilt (64" square with 3" HST's)
70 FG + 620 HST = 51" square quilt (76" square with 3" HST's)
86 FG + 932 HST = 62" square quilt (93" square with 3" HST's)
I haven't double checked my math, but this should give anyone a rough idea of how many blocks they need for this quilt.