ok.a si`ve (hopefully ) dealt with the construction side of this model, i`ll move onto the electrical side. starting with the components....
2x servo`s ..........( not much need for description here)
their controlling dive planes and rudder
1x ESC ..........., 12v msonik sub type, straight forward operation of main drive motor.
PRESSURE SWITCH....... This sits at the bow of the tech rack,connected to Bulkhead via a metal tube and platic tubing, this detects depth pressure, when a maximmum of 1.8 metres is reached the pressure switch closes.
BALLAST TANK. cylindrical tank with a pistin internal, works like a syringe drawing in water , and when required forcing water out. commected to the rearmost bulhead ( Bulkhead A) via a metal tube and plastic tubing. and is driven by a 540 size motor. when the tank is filling the plunger is drawn along the tube by a gearbox , a threaded rod is connected to the plunger part of the tank, it projects as the pluger is drawn along ( just like the handle on a syringe when sucking up water ) . this rod has microswitches adjacent to it , so that when the end point is reached the microwswitch triggers and stops driving the motor. it is slightly more complicated than this but , i`ll refrain from describing this for easier understandibility.
Ballast tank switch... like a relay board, this detects end points on the ballast tank and also the fails safe systems.
there are three failsafes built in..
1. if main battery voltage drops below 9.2 volts the sub will not dive.
2. if signal is lost , the sub surfaces ( if in a submereged state)
3. if pressure switch activates the sub will surface, this is apparently at a depth of around 1.8 metres.
i have tested the first two failsafes, and i`ve tested the third by blowing down the tube that connects to it.
Sub level unit
there is also another component that is "optional". this is a small unit , about the size of a postage stamp, that sits amidships. This unit conects to the dive planes then to the receiver. the idea being that it keeps the sub level when under water . kind of like a gyro .
Drive motor, i think now that i`ve had a second look that it`s a 5 pole 540 ( making it a 545 ) motor.
Batery power, is from 20 sub `c` NiMh 3000Mah cells.
wired so that supply voltage is 12v, 6000 MaH.
all in all a fair weight when put together.
this all takes up 4 channels. not bad considering the amount of technology onboard .
The tech rack assembled, The motor,speedo and BTS are hidden in the tail section.
The underside of teh tech rack, just visible is one of the battery packs,the ballast and the two water tubes, the silver coloured one is for the tank, and the smaller brass coloured one is for the pressure switch.
This picture shows the microswitches ( three in total) at the rear of the dive tank, just visiblew is the brass coloured piston rod that activates the switches as it travels outwards., ( aprox 8 inches in total)
This is the dive plane controller for keeping the sub level.
And lastly just visible through the roung cut out`s is the pressure switch.
Linear Mode
