Good evening,
If I fail a control roll, does the aerospace fighter lose altitude?
Any situation where failing a Control Roll sends you out of control in atmosphere causes you to lose Altitude. Air combat is NOT for the faint of heart.
Note that there are times when failing a Control Roll does NOT send you out of control, such as when attempting a Special Maneuver. Because failure doesn't send you OOC, there is no Altitude loss.
A strafing attack is only one hex wide and five hexes long correct?
Correct.
Does a "bomb" critical require a control roll?
No. Only those crits that explicitly mention a Control Roll in their descriptions force a roll