One T-45 issue that I am having after launch is the gear won't retract till I manually retract the launch bar. Using SBD Enterprise.
T
This appears to be a quirk of the way things were implemented in Acceleration, basically the launch bar auto-retracts if the aircraft is off the ground (i.e. the SIM ON GROUND variable equals 0) and the aircraft is in reheat (afterburner for the colonials), which is great for the default F/A-18 less so for aircraft that don't need an excess of thrust to overcome their aerodynamic deficiencies.
You can get round it by putting an afterburner section in the aircraft.cfg but not having it available, example below from the Buccaneer S1, oddly it seems to be the presence of the last two entries that fools FSX.
[TurbineEngineData]
fuel_flow_gain=0.02 //0.0045 //Gain on fuel flow
inlet_area=3.8 //18.0 //9.4 //Square Feet, engine nacelle inlet area
rated_N2_rpm=9200 //RPM, second stage compressor rated value
static_thrust=7100 //Lbs, max rated static thrust at Sea Level
afterburner_available=0 //Afterburner available?
reverser_available=0 //Thrust reverser available?
thrustspecificfuelconsumption=0.9 //PPH per pound of thrust
afterburnthrustspecificfuelconsumption=0.9
afterburner_throttle_threshold=0.95