How can I slow my plane down without throttle？they didn't work.

Recovery丶9527

用鼠标点击呀老兄

Recovery丶9527

You can use the mouse to move your throttle

姜忍者

Full flaps, controlled stall, if on the ground brakes, you can also drift with full rudder in the air and counteract with the aileron to greatly slow the plane.

Quickest way to slow it is to hit something solid though, like the ground.