I'm having a few issues with the vehicle rules, and right now the limit on taking a second Maneuver for Silhouette 5+ is really bothering me. I can't see a good reason for it. Silhouette 5+ are already barred from many Maneuvers, so what's left:
Accelerate/Decelerate: OK, I can see a possible argument that Silhouette 5+ shouldn't be able to change two Speed in a single turn, but doing so costs Strain, so that's already there. Beyond that, I certainly don't see why this couldn't be combined with Fly/Drive in the same turn if the vehicle takes Strain.
Fly/Drive: Here's a real problem. Since moving takes this Maneuver and the outcome is then based on Speed, we end up having lower Speed Silhouette <5 vehicles outrunning higher speed Silhouette 5+ vehicles. Why can't a bigger vehicle actually travel at the same rate as a smaller vessel with the same Speed?
So, what would the overall effect of allowing Silhouette 5+ vehicles to suffer Strain to perform a second Maneuver in a turn?
1) It would allow them to Accelerate/Decelerate twice in a turn.
2) It would allow them to Accelerate/Decelerate and still Fly/Drive in a turn.
3) It would allow them to keep pace with a lower Silhouette vehicle of the same Speed that is using two Fly/Drive Maneuvers.
4) It would NOT allow them to use Evasive Maneuvers, Stay on Target, or Punch It.
I think that this would be a positive change and I'm likely going to make it a house rule in my games.