Greetings, this is my first post. I have been searching for Blackbirds on the ground and have collected 18 of them.

As far as I am aware the other remaining Blackbird aircraft are either destroyed/cannibalised or under cover in museums.

EDIT : Added a Ninth one.
EDIT : Added a tenth one
EDIT : Got twelve now thanks to Renegade
EDIT : Got thirteen thanks to Criper2000
EDIT : Added another three thanks to Hill and af_mmolina
EDIT : thanks to esterrett for finding another 2