ORIGINAL: khodges

I think the gear should sweep forward if at all. It sounds to me like no toe-in and overcontrolling. Once you get an oscillation started, there's no way to "outhandle"it, the best thing to do is back off the throttle and start over from a stop. If you have the capability in your Tx, add about 40-50% exponential in the rudder, it will be less sensitive around stick center and may help with the overcontrol until you get a feel for how much rudder you need; then start taking expo out until you're around 25%.

I have to disagree with the post regarding toe-out, that will only increase the tendency to oscillate on the take-off roll. You only need about 1-1/2 to 2 degrees toe-in, but it needs to be equal between the wheels.

It may be that your plane is more sensitive than most. All my planes except my old Superstar are tail draggers, and they all handle differently, some are easier than others to maintain straight on the roll, but they ALL have to be steered with the rudder. I am a big fan of the "roll the power on slowly" method, allowing airspeed to fly the plane off the ground with just a nudge of up elevator. Horsing it off quickly at max power is a recipe for ground loop or torque roll into the ground.

If you haven't flown tricycle gear yet, I strongly recommend it first. There's a reason that almost all trainers are set up this way. Warbirds will still be there for later, and hey, P-38, P-39, P-61, P-63, B-26, B-25, A-20 all have tyricycle gear