Michael Borda from Image Space Incorporated has published part two of his tire physics blog and posted update v080 of the Brabham BT44B WIP project.
rFactor2 [Updates] - Page 10 - rFactor 2 - PC Gaming Forum
rFactor 2 Releases Q2 Update and Content, Page 4
Brabham #8 Motor Racing Developments BT45B, Forza Wiki
Rfactor Archives - Page 36 of 95 - Bsimracing
Engine model and gear ratio restrictions – Studio-397
Rfactor Archives - Page 36 of 95 - Bsimracing
Rfactor Archives - Page 36 of 95 - Bsimracing
New rFactor 2 Update Available - Bsimracing
Brabham BT44B and March 761 Release – Studio-397
The rFactor 2 Blog Tracks – Studio-397