Planet-Based Fighters

Was there a discussion a while back about planet-based fighters?
Something about atmospheric streamlining as an additional cost factor?
I'm looking to cost air/space fighters for FT - a boost to any planetary
defense.
Figure 1 turn to transit atmosphere after launch or during recovery (in
which they are target-able by ADFC), then treat as standard fighters.
Cost +6 or +12 per group?

Noam R. Izenberg		noam.izenberg@jhuapl.edu