Sorry for your lost. It was grossly under power. You should calculate the thrust to weight ratio. Delta require more thrust to weight ratio than a barn shape sail plane. Successful launch decline if the thrust to weight ratio is less than 0.5
In the future, everything will be done one-handed while the other holds a phone aloft so as to capture poor footage, usually unusably out of frame. And people will consider it an advance, purely because everyone does it.
Amazing job. lmao BTW this RC has about 3 times the area of the small ultralight real manned planes that are criticized for their "low wing loadings"! love going outta the box