Jet-Tronics Brakevalve does not consume air while braking proportionally. A big advantage of this valve is the possibility to partly activate the brakes already in the air if the undercarriage is dropped. While touchdown the plane immediately decelerates due to the partly activated brakes which causes much shorter landing distances and it also prevents jumping of the plane. In case the runway is still too short, it is possible to program down elevator for full brake. A further advantage is that you can use the brakes during taxiing to the start point without being anxious to waste air.