süsteem, mille puhul propelleri labade nurki saab reguleerida otse lennumeeskonna kabiinist või muul viisil ning mida tavaliselt kasutatakse lähenemisel ja maapealsel käitamisel, a system whereby the propeller can be operated at blade angles directly selected by the air crew, or by other means, and normally used during the approach and ground handling, a system whereby the propeller blade angle is directly selected. For constant speed propellers, beta control is normally used during ground handling, including reverse pitch angles.
