Thanks Brian, Features – “Integral Spektrum 2.4DSM2 twelve-Channel Receiver” Integral means – “Essential or necessary for completeness”. In other words this is a Powerbox Royal with a Spektrum12 Ch receiver system included. And we already know that the Spektrum 12 channel system have 4 external rece...

Brian, Yes these are the same operating instructions I am looking at. http://www.powerbox-systems.com/e/powerbox_systeme/powerbox_royal_spektrum/start.php Please tell me where it clearly states – “The Powerbox Royal Spectrum has one reciever and two power suppliers and uses four satelite receivers t...

Sometimes better asking the makers – Hello Tim, We have had many of pilots in Germany, France and U.K. they take the PB Royal Spektrum for models over 25 kg, we have this limit in Germany and France. It is so that the Spectrum have 4 receivers, when 3 receivers fault then you can fly with the last, ...

Martin – please could you indicate where on the Powerbox Manufacturers instruction sheet it “Clearly describes” that “The Powerbox Royal Spektrum has one receiver? Or where it clearly describes – “and uses four satellite receivers to collect the signal for the SINGLE MAIN RECIVER and DECODER”? What ...

Tony, One very interesting point that has come out of this discussion has been that the Powerbox RRS introduces a single point of failure into the receiver installation so would not meet the criteria agreed with the CAA – “Upon the failure of any single point in the airborne control system, the mode...

Thanks Shaun, Now I understand where you are coming from. I'll keep my wallet firmly in my pocket until it is fully clarified - we are given clear guidance on what 2.4g receiver units would meet the CAA over 20Kgs compliance. I already have a Spektrum AR9100 in another model (16 kgs model) and found...

Shaun Quote - "powerbox royal spectrum which has one 12 channel Rx but no capability for rx redundancy". Shaun, the Powerbox Royal Spektrum has 4 receivers - all external. So if one fails, there are still three Rx's left - each can maintain full control of the model. How is that "no c...