F4U rudder authority doesn't really kick in until you're 100-150mph, below that it's not very responsive (tho most craft aren't, either). The Corsair has a VERY strong tendency to veer left on the ground due to engine torque.
As WW suggested, try and get all three wheels on the ground at once. This takes a good approach angle, tho.
If you're coming in "hot" try this:
Get the gear down ASAP. They make wonderful airbrakes.
Once the F4U's rudder becomes effective, it REMAINS effective at higher speeds than most aircraft. Start skidding the plane to get your speed down.
Use manual trim. Combat Trim IMO makes the aircraft far more difficult to control on takeoff/landing. As I deploy flaps I start trimming the nose DOWN, especially if I'm coming in fast, to counter the sudden popping up of the nose at each notch (often I end up with elevators trimmed full down by the time I land). Watch your gun drift indicator on the sight (That's the little bubble). Keep it centered. If the bubble is to the left give a little left rudder trim, repeat as necessary if it's too the right. Trim your ailerons to keep the wings level--in my experience the closer to level your wings are on touch-down the better your chance of getting her down under control. It's REALLY beneficial to have manual trim controls mapped to your stick and/or throttle.
Use rudder, rather than bank, to make fine corrections to your approach. Use bank only if you need to make larger adjustments.
If you're only able to get the main gear on the ground, let her roll a ways on the two wheels and use rudder and differential braking to keep the nose straight as you reduce speed. Get the tail wheel down as soon as possible and hold back on the stick this makes it easier to control your taxi. Do this BEFORE applying full brakes on both wheels (until then, I generally give light left brake, and more to the right brake with rudder in that direction, as again the Corsair's natural tendency is to pull left on the ground). Alternate left/right brake as needed.
