It sounds like the plane did not have a positive angle of attack on the ground.

In other words the front of the wing angles down relative to the back.

This causes the nose of the plane to be forced down during run-up, keeping it on the runway.

You got the plane going more than fast enough, but when you pulled back it effectively stalled because of the abrupt angle change.

All of this is fairly indicative of the wrong AOA/Incidence.



FYI: The plane can take off and land at fairly slow speeds.

I've brought it in with the engine shut down ( purposely ) and it glides VERY nicely.

It's pretty docile an a good starter EDF, which is why I've recommended it to people getting into EDF's.



So try to adjust the landing gear so that the plane sits with the nose higher.

Also the neutral point of the elevons should have them both UP about 1/4".

That is with the stick centered you should have about 1/8" or more space at the elevon edge between the control surface and the wing edge with both elevons deflected UP.