Upgrades to the ARFF

 When I first designed the ARFF I designed a boom system to house the top nozzle, however as the build progressed I decided not to use the boom and instead go with a top water canon. I have now changed my mind again and decided to go back to the original design with a boom. The design is very different from the original drawings and much, much ligher. It uses four linear actuators running at 30mm/s with a combined lifting force of about 8kg. The unit will be bolted into the same area as the top canon so there is little to no modification needed to the ARFF top plates.  

The lower nozzle has also been modified and runs the foam system which is now working due to adding a foam concentrate injector pump and switching solenoid. All I need to do with the lower nozzle is play around with the nozzle config to change the water streams.

The top nozzle mounted to the boom will pan and tilt using mini servos.

The boom is made up from lightweight materials so the actuators should not be taxed to much.

It uses a simple mecahnism similar to the real thing just scaled down. 

Four linear actuators will be used to move the boom assembly. Each runs at 30mm/s and can lift 20N.