Boy and Instructor Are Preparing an Aircraft Model to the Launch, Model With Rubber Engine. People at Aircraft Model Sports Competition Outdoors. Hands Close Up. Dry Grass in a Field in Konotop, Ukraine. Preparation For Launching the Airplane Models. Kids' Technical Art. Models Assembly Before the Start. Airplane Launching. Estimation of the Aircraft Flight. Jury is Estimating the Start and Flight of the Airplane Model. Scene in Cloudy Summer Day. Blurred Background