1> Line up for target (I recommend at least 20 miles out)
2> Open bay doors, then stabilize your speed
3> Press F6 (bombsight mode)
4> Pull up clipboard, then open E6B
5> Press U to enter calibration mode
6> Hold down Y for at least 5 seconds (I recommend 15-20 seconds if you have the time)
7> Make sure your calibrated speed is the same as your E6B ground speed, if not then recalibrate
8> Press U again to EXIT calibration mode (VERY IMPORTANT)
9> Use AILERON controls (stick left/right) to make light turns while in bombsight mode
10> Drop bombs when crosshairs is on target!
NOTE: You should keep E6B up during the whole process. If your speed changes, use the throttle controls while in bombsight mode to adjust your planes speed to match your calibrated speed. If your speed varies greatly, or if you make a hard turning maneuver, you'll need to calibrate again.
If time is short, I've found it's faster to do a quick 5 second calibration, and then adjust the throttle to match E6B with calibrated speed, however keep in mind your calibration won't be perfect, but usually close enough to nail the target.
Also.. again make sure you EXIT calibration mode (U) before dropping your bombs. The crosshairs in calibration mode point straight down and will cause you to miss your target, however once out of calibration mode they will point forward a bit (calibrated distance based on speed) and will then be lined up. I'm sure we've all made this mistake at least once or twice!
Oh yeah.. one more thing.. in the AR234, make sure you select bombs, NOT RATO's (even if depleted these will still show on the ammo display.. you have to manually change it to bombs). That makes for a funny mistake!
Hope this helps!