FarmerAlex
Member
Here's a foam marker I made for my broad jet sprayer.
First step is to put in a little brass nipple into the blower tube, 1/8 tube diameter is plenty, then get bird netting roll up fairly tightly to the diameter of the blower tube, with a the length of the netting sausage around two fists long. You can make it longer or shorter depending on what restriction you need to regulate the airflow out. For the foam solution tank I used a 20l plastic petrol container, gives around an hour of continuous foam marking. You need three nipples in the lid, one for a suction tube that goes to the bottom of the tank, an air equaliser vent and a circulation return from the pump.
Now for the pump I used a model aircraft fuel pump, runs on 12v and shouldn't be attacked by the foam. The outlet line from the pump should have a tee in it one returning to the tank the other to the blower. Using a clamp restrictor on the return line you can govern the foam output of the unit.
On the end of the blower I am using a turps plastic bottle, cut the bottom out to let the foam out, a circular hole that's a tight fit over the blower end, slip it on and your good to go.
I run my blower just above idle, a tank lasts a very long time...
Once done just pull out the bird netting and your blower is back to normal.
First step is to put in a little brass nipple into the blower tube, 1/8 tube diameter is plenty, then get bird netting roll up fairly tightly to the diameter of the blower tube, with a the length of the netting sausage around two fists long. You can make it longer or shorter depending on what restriction you need to regulate the airflow out. For the foam solution tank I used a 20l plastic petrol container, gives around an hour of continuous foam marking. You need three nipples in the lid, one for a suction tube that goes to the bottom of the tank, an air equaliser vent and a circulation return from the pump.
Now for the pump I used a model aircraft fuel pump, runs on 12v and shouldn't be attacked by the foam. The outlet line from the pump should have a tee in it one returning to the tank the other to the blower. Using a clamp restrictor on the return line you can govern the foam output of the unit.
On the end of the blower I am using a turps plastic bottle, cut the bottom out to let the foam out, a circular hole that's a tight fit over the blower end, slip it on and your good to go.
I run my blower just above idle, a tank lasts a very long time...
Once done just pull out the bird netting and your blower is back to normal.
