confining prescribed fires

An RxFire (Prescribed Fire) is an intentionally set fire that is used to consume fuel on the ground so that a real wildfire will be stopped due to a lack of fuel.

The figure below shows how the spray hose system can be used to confine an RxFire. Only selected segments of the hose are enabled to spray. Manual valves on each hose segment can enable spray only where it is needed

The spray hose system can enable Rx Fires to be set when less than ideal weather and terrain would prevent starting an RxFire.

selectively confining spray on a prescribed fire to conserve water

Segmented Spray hose

Above, the green main-hose is connected to the purple hoses by the white Valve Boxes which represent a manual valve. When a valve is opened, it causes a spray from its respective purple hose. This arrangement is being used to confine an RxFire by spraying only locations where spray is needed.

Below, the Ball Valve allows the psi seen by the Rx Spray Nozzles to be varied by hand. The flow of water can be fine tuned to meet the needs of water vs. water conservation.

10 small nozzles which can confine an rxfire

Above is a very low cost version of the valve box shown in the previous photo. The yellow 2.5 inch hose can be the Trunk hose that supplies water to all of the 1.5 inch brown Spray Nozzle segments.

Smaller nozzle with same water chamber and same performance but smaller diamter.

Above: Smaller spray nozzle. It is spraying in the previous video.

It has same size water chamber as large nozzle, but smaller diameter and more friction loss. It delivers 7 gpm at 100 psi.

Below: Two low cost clamps are used to hold the nozzle at the desired angle.

Spray Nozzles that deliver less water with same coverage

I have been told that crews that set RxFires are often limited in their water supplies. Therefore, I have designed a smaller version of the

Spray Nozzle that uses less water to cover the same area as the original Spray Nozzle.

The small nozzle can be spaced 10 ft from adjacent nozzles and can be connected by 1.5 inch forestry hose.

introduction
Confining_Rx_Fires
Ethernet_Hose
Digital_Relay_Pumping
Ethernet_Boards