Coventry Retired Service and Voluntary Personnel are knitting blankets for Africa (Feed the Children). They are knitting squares in DK wool, using 3.75mm needles, 30 sts and approx. 45 rows (roughly 16cm square). I worked out the following squares for a knitting machine:
4ply, std m/c, T6, 49 sts x 68 rows
DK, chunky m/c, T3, 30 sts x 44 rows
DK, std m/c, T9, 40 sts x 55 rows
Aran, chunky m/c, T6, 27 sts x 36 rows
I might just knit them in strips, save on sewing up time. These are based on the Brother KH836, and the KH260.
Their target this year was 1000 blankets, they've reached that just recently and there's still 5 weeks to go this year.