Hi Oldbob ,
Looks like you have an answer. I have had two biplanes and just loved them. They are a handful to get off the ground and land. I always tended to forget this. Everytime I stopped flying it for a while the first takeoffs would be horrible. As I recall, during takeoff I used various combinations of slow throttle input, some up elevator, lots of rudder and finally full throttle. Staight down the line takeoff were the exception rather than the rule. It has been at least two years since I flew one last so I cannot seem to recall some of the details. Good luck with yours.