by Hooray » Mon Sep 21, 2015 5:55 am
you are apparently mixing pre-compiled RCs (relase candidates) with binary packages (PPAs) provided by another contributor without understanding the repercussions: RCs will be regularly built/updated and uploaded (provided for download) by the FlightGear build server, the fgdata package is maintained in a repository, and the PPA you are using isn't automatically updated, so you need to either use a cloned repository or wait for the PPA to be updated. Manually installing missing stuff is generally not recommended, unless you really understand what you doing, which doesn't seem to be the case - otherwise, you would probably be using a repository checkout instead of the PPA (which is also likely to be much more efficient from a downloading/updating standpoint, because it can be incrementally updated)