u/Adventurous-Stage605

A-4 - 479 blocks - 10.8 long x 7 wide

See it in action here.

The whole plane is about 500 blocks; the cannon itself is 90.

496 blocks - 17.6 long x 16.8 wide (11.5 swept)

all under 500 blocks and built at roughly 1.1 m/block scale (1:1.4)

F-86 - 433 blocks - 9.9 long x 9.8 wide

MiG-15 - 466 blocks - 8.9 long x 8.5 wide