Hello Stephen
I hope my Cent work better like your Chieftain.
Well now the Centurion is running.
At our heavy models, it is important for me to make sure a safe run. My rc equipment is from brixl special designed for functional models with 2,4 GHz:
http://www.brixlelektronik.de/index2.htm
To program the transmitter and receiver is very different to other rc equipment you can normally buy:
- The model program is in the receiver. Complete another idea to program but very easy when you realise the different.
- You can run more than 1 model at the same time. One in running the others in parking position.
- You have 3 program levels. To every level you can assign complete another function to the same joysticks. For example to run an excavator: Level 0 no function at all (safety level), level 1 to drive the chassis and level 2 to use the same joysticks to run the upper carriage with the hydraulic.
Now
The electric fuel tank

The transmitter

The receiver

The 12V switch

The voltage transformer 12V to 6V to the receiver

The 24V main fuse and the 12V main fuse (when it is out of work you see a red light at the top)

The relay to switch 24V (idea from Günter). It is important to install a diode in the 12V net to cut down the induction voltage from the relay when you switch it off.

The electronic switch (directly receiver to relay) for the 24V relay – level 0 or radio signal cut down => there is no 24V at the engines! => safe!

Like you see I have only one manual 12V switch.
Kind regards
Frank