I have a new composite ROO and have successfully completed three flights takin off directly into the wind, the fourth and fifth turned ugly. There was quartering head wind from SSE at around 3 knots. I began a slow roll out and was at full throttle about 30 feet out, at that time the plane turned sharp into the wind out of control. I did not have the elevon pinned full up at that time however, it was as if the nose wheel still had no authority. Anyone had a similar experience?

I had a similar experience when I had too much throw in the nose wheel. I did not have a gyro in it either. Once I backed off on the ATV for the nose wheel, it tracked much better.

I always held full up elevator on take off. It wont go til ready. This should stop the slide.
Scott

Mark,
Yea, sounds like too much steering travel! Separate your nose gear channel from your rudders (mine has nose on 4 and rudders on 6) so you can dual rate you nose gear without having to cut the rudder rate. Use high rate to taxi out and line up than go to low rate for take-off. I usually switch back to high for landing. Not sure if you are using wire strut or a oleo type but have found the oleo struts help the tracking on the roo greatly.
Todd

I always use full power on take off, because the thrust of the high mounted engine keeps the nose wheel firmly on the ground.
You said you had full power so I'd guess your steering may be too sensitive like the other messages said.
You don't have to us full up elevator till you're ready to lift off.
I often use just a touch of up for a more scale lift off.

Never use full power on anything over 18 lbs of thrust at take off. You must hold full up elevator during take off otherwise the high mounted turbine location will lift off the main wheels before the nose wheel and cause a ground loop. A gyro on a nose wheel will not help this condition.

Make sure you have about 2 degrees toe in on the main gear and some caster on the nose wheel.

Make sure that one of your brakes is not dragging more than the other when they warm up.

I take off with full up elevator and 3/4 power and never had this problem again.

It is the problem of too little load on the mains. The landing gear should be 10% of the total on the nose. With the nose as low as it goes with full power the wing should be level.
Darryl Usher

I take off with full power (P-120) and only apply elevator when ready to rotate and never have this problem, sounds like he is simply over-steering. I do however hold full brakes until the engine is spooled up, thrust will compress the nose oleo then I release. This may help as it is applying quite a bit of weight on the nose gear during takeoff roll (until it starts to lift) using this method.
Todd

I had this happen several times on the new composite roos. Full up elevator eliminated it.
Scott

On my original Roo, they recommended 20 degrees caster on the nose wheel.
Do you have any caster in your nose wheel?
Makes them track much better and be less skittish on tale off.