Russian Typhoon Submarine

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Receiver and Expansion Modules

Here is the standard seven (7) channel RX775 DF Receiver. It will eventually be housed in my forward watertight container (WTC) along with the below expansion modules.
Here are my two (2) Multi-Switch-Prop 12+2 Decoder Memory modules (#8370.)

For each Multi-Switch-Prop module, there is one decoder required at the receiver end. The decoder occupies one servo channel, but provides direct control of 12 switched channels and 2 servo channels. The operating voltage 4.8 - 24 volts and up to 2.7 amps per output.

All channels assigned to one physical switch can be switched on simultaneously. If preferred, the memory function can be switched off. The output stage is short-circuit, reverse polarity and overheating protected.
I´m so glad I decided to use terminal blocks in my forward WTC because, as you can see, things are getting a little confusing. But, with terminal blocks, it´s much easier to see where everything is and what controls what!

Here, I´ve installed the receiver (powered through the BE/VR) and both Multi-Switch-Prop 12+2 Decoder Memory modules (#8370.) that are powered directly by the battery.
The forward battery (I´ll have two in the sub) is a 12 volt - 7.5 amp - sealed, lead-acid. It will reside outside, and forward of, the WTC just aft of the two working missiles. Here, you can see the connection method (using brass bolts/nuts/washers) and Faston connectors.
Not only will the receiver and expansion modules control the electronics in the forward WTC, but they will also control the rudder servo, stern planes servo and both Electronic Speed Controllers (ESC's) in the aft WTC. This requires running servo extensions to the aft WTC.

Futaba makes a 1-Meter, J-Extension that is perfect for the job. I needed four (4) of these, and I purchased them from Tower Hobbies.
I solved the problem of running electrical wiring between the WTC's by using waterproof PVC conduit complete with straight connectors and o-ring seals. The conduit is flexible enough to traverse around my aft bilge tank, but strong enough to withstand underwater pressure.

The conduit also makes for a nice, neat package when connected.

Next Step - Part 4 - Channel & Clippard Valve Assignments, Schematics

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Last Updated Thursday, March 13, 2003 3:02:22 AM