Hi springhillflyer
On a good day you probably will be able to take off. A good day includes cold weather, about 15MPH head wind, and short grass. I had a pusher puller with two .28 Magnum engines turnig 9x6 APC props. On a "good" day I could take off with either single engine. Usually I would wait till it appeared it would go no faster, then I would "jack" it up with the elevator to get it to run a little higher in the grass. Sometimes quick jerks of the elevator worked; sometimes not. I a perfect day it could break ground with just some up elevator. Once it would break ground I would be satified with 6 inches of elevation. I would build up speed for a while and then try for one foot, etc. Choose a field and direction that will allow you to crash safely. I had a ball with mine. When it was up over 90 degrees Farenheite I could not jack it out of the grass. Once in the air it could be handle fairly well, but you do have to look ahead much further. Turning into a high wind can cause you a lot of altitude or a quick landing.You should do OK. I always had the drag of a stopped prop and the weight of a dead engine. Use a smaller fuel tank or fill it only 50% if you have to. Let me know how you do.