Thea Powerbox-Systems Champion RRS has been in the Powerbox family for many years, and always as a front runner in power distribution systems. Currently I am using them in my competition models, and in this article I will describe the reasons why and the advantages once programmed correctly.
Recently Powerbox-Systems has renewed the design of their Champion RRS, now including anodised heat disipators and the option of supplying the servos with either 5,9V or if desired, 7,4V for todays new high voltage servos.
Due to the flexibility of this powerbox, I ordered a further unit for my new Extra 260. Some of the main reasons why I chose the Champion RRS where:
-the option to use two lipo”s and two receivers, adding redundancy to the whole system. (If one receive loses the sugnal, the powerbox automatically receives the signal from the second receiver)
-The LED to display the state of the batteries, along with a screen to show the state of each receiver.
-But the main reason, and in my opinion a feature that put it a step above the rest, is the capability of programming the servos of 3 of independant channels through the powerbox with the adjuster board, which once read the instructions is very easy to use. This avoids the need to use “Matchboxes” or the need to use Hitec servos for their programability. In total, there are 4 adjustable servos pero channel, giving a total of 12 programmable servos.
The instalation in the model could not be easyer, by means of the same rubber grommet system used in most servos.
The receivers are corrected by the patch leads included in the kit. You can plug the receive channels in the order that you wish, as long as the second receiver is plugged in using the exact same order as the first one (it is not necessary for ch1 of the receiver to be ch1 of the powerbox, however the ch 1 of receiver 1 and ch 1 of receive 2 must be in the same channel in the powerbox.
The switch included in the kit is very safe due to the fact that even if completely unplugged from the powerbox, the system will not turn off.
To turn the model on (or off) simply press the “power” button for one second until the red LED turns on, then press the buttons for batteries I and II and the green LED”s will now light up also to show that the batteries are turned on.
You can programme the powerbox to work with either NiCd, NiMh, Lipo or LiIon betteries, however it comes set up already for use with Lipo.
The capability to regulate the servos through the powerbox is a great advantage especially with the larger sized models that have more than one servo per surface, as we can assure that the servos do not fight each other.
The typical example would be one of my aerobatic models, with two servos in ailerons or rudder.
Programming servos through the Powerbox-Systems Champion RRS:
To adjust the servos we use the Powerbox-Systems Adjuster Board, that is plugged into the side of the powerbox. To assure that the programming is completed perfectly, first we must have all the transmitter settings at 100%, without any trims or sub trims.
For this example, we are going to programme two servos so that they move equally on one aileron, and that they are plugged into channel 3 in the powerbox, which is the programmable channel “A”.
The first process is to teach the powerbox the throws available in the transmitter, and then the second step is to adjust the servos accordingly.
We start by plugging in the Adjuster Board to the side of the powerbox.
The first phase of teaching the powerbox the throws of the transmitter is completed as follows:
-We move the first dial on the adjuster board to “A” and the second dial to “Reset”
-Now we press the buttons “+” and “-” at the same time. (the yellow and red LED will light up on the adjuster board),
-With the transmitter stick in the centre, we press the “+” button (so that the powerbox memorises the centre position)
-Holding the transmitter stick at full throw, we press again the “+” button (so the powerbox memorises the full throw position)
-We do the same for the oposite full throw, again pressing “+”. (so the powerbox memorises the opposite full throw position)
-When we press the “+” button for the third time, the powerbox accepts that you have told it the three programming spaces (full left, centre and full right) and the yellow LED will turn off. To save the positions for the servo, move the second dial to “Save” and press “+”, with this the red LED will turn off and the settings have been saved.
The second phase of programming the servos for your model:
-Connect ONLY the first servo and programme it as normal (using transmitter sub trim and end point adjustments).
If you wished to do so, you could also programme it with the powerbox using the same process as the other servos, as follows..
-Connect the second servo, however leave one of the ball links disconnected. Select on the first dial “A” and the second dial servo number “2”. To programme the centre, leave the transmitter stick in the centre and adjust the servo centre with the “+” and “-” keys. To assure that it is correctly centred, you should be able to put in the bolt for the loose ball link easily.
-To programme the full throw, do exactly the same, holding the transmitter stick on full and adjust the servo position with the “+” and “-” keys, repeating the test that you can easily put the bolt through the ball link.
-Repeat the same process for the opposite full throw.
-As soon as you make one change, the red LED lights up, to indicate that a change has been made but has not yet been saved. To save the changes, move the second dial to “Save” and press the “+” button. the red LED will go out because the changes have now been saved, and your servos are sincronised correctly.
I am currently using this powerbox in my Hangar-9 Extra 260, Krill Yak 55M and Krill Katana 39% and could not be happier with the results.