FIELD: space engineering for control of tension of trailing-out rope; textile, paper-making and other industries. SUBSTANCE: proposed regulator has drum with flexible member, rocker on hinged support, two fixed rollers and one roller fitted on rocker arm and brake block mounted on other rocker arm. Flexible member embraces in succession first fixed roller, fitted on rocker arm and second fixed roller. Brake block is spring-loaded and is engaged with drum rim. Force of compression of spring is equal to: 
where P is force of compression of spring; N* is preset tension of flexible member; "a" is length of rocker arm with roller; "b" is length of rocker arm with brake block. Relationship of main sizes of regulator satisfies the following condition: 
, where rmax is maximum radius of winding flexible member off drum; Ro is drum rim radius; k0min is minimum coefficient of sliding friction between brake block and drum rim; ε is permissible relative error of flexible member tension control. EFFECT: enhanced accuracy of tension force control. 1 dwg
