Throttle is a hand held squeeze lever or a thumb lever. Unless you are chilling it’s constantly in use to modulate your altitude and control your turns.
Engine is Vittorazi Moster. Carb is a diaphragm type no bowl. Will need to get a picture of the other side.
Yes you are basically on a parachute already. If your engine dies you have about 6 times your height to find a landing spot. With practice a 50 yard field is plenty provided no tall obstacles as you come in.