Well guys I thought I had it all figured out but..... I took the spacewalker back up again today, now keep in mind the box it came in calls for a 40-52 2stroke or a 50-72 4stroke , the assembly manual calls for a 46 2 stroke or a 53 4 stroke, and the website calls for a 40-48 2 stroke. I checked all controll surfaces and also did a range check after I tuned the motor (was a little humid today). My buddy was running the camcorder as usuall and the girlfriend was at home......because we cant let them know about all the planes now can we? LOL. I proceeded to the far end of the grass runway (which is 400 feet long ) and did 3 taxi runs. After going approximately 20 feet the airplane wanted to lift the tail and it wanted to leave the ground. I then repositioned the airplane at the beginning of the runway and started to increase the throttle slowly to get it up on the main gear. It increased speed for about 100 feet running on the main gear . When it hit about the 150 foot of runway mark the airplane lifted off at a 25-30 degree climb out. At this time I was at 1/2 throttle and going straight out. When the airplane was about 15-20 feet off the ground it started torqueing to the left and i corrected with right aileron. It then straightend level but as soon as I left up on the right aileron imput it rolled hard to the left and at that point there was no saving it. It rolled almost completely upside down before hitting the dirt. The flying wieght of the airplane is 6-7lbs and has a 61inch wingspan. Could the Saito 72 have caused the torque effect swinging a 13x8 prop? the airplane flew slow with the Magnum 40xl 2stroke engine but was just underpowered and needed all the runway to take off. I later found out my buddy looked up from the camcorder and didnt get the full roll, just a little of the climb out and that was all. I wish i would have the video to show but i do have pictures of the airplane after the crash. My question is why will this plane jump off the runway at 25 feet but wont fly after getting enough groundspeed? Oh yeah I almost forgot to mention the broken motor mount we found right after the crash. I hope the engines ok because it didnt break the plastic nosecone or the prop all the way off.