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Fiber Optic servo extension

Discussion in 'RC Radio Systems' started by Forgues-Research, Jan 28, 2017.

   
  1. acerc

    acerc 640cc Uber Pimp

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    Why not just go ahead and integrate your system with a power distribution so we can have the ultimate protection in one package?
     
  2. Forgues-Research

    Forgues-Research 150cc

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    You mean like this .. also it has dual servo battery input and 3 failsafe electronic switches
     

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  3. acerc

    acerc 640cc Uber Pimp

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    If the servo plugs into it for power and fiber-optic, and batteries separate than Rx, then yes. Is that on your site? What is the site? I have a few $10k models (and building more) and really like the idea of the protection this lighted system would offer.
     
    Last edited: Feb 5, 2017
  4. Forgues-Research

    Forgues-Research 150cc

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    there are two boards, one for the receiver connection to the encoders and failsafe switches for two receiver batteries, the other board is for the power to the decoder/servos again with failsafe switches to two batteries
    you can see the single orange wire from the board, this goes to the the receiver where you would normally connect the servos, out of all of them one has the power also
     

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    acerc likes this.
  5. acerc

    acerc 640cc Uber Pimp

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    You got me, I'll give it a go, where can I get this?
    Actually, once I realized this is the same for our radio system as I am using for engine kill I was hooked.
     
  6. acerc

    acerc 640cc Uber Pimp

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    Just a note, there are other things in our system other than servos and ignition this would greatly protect the Rx from. Things such as smoke pumps, lighting switches, electric retracts, telemetry recorders, and the such. I am just thinking about how many times at an event I have seen a plane go in and the pilot had no knowledge of why. Something electrical most likely and this system would eliminate that, one may find something fried upon landing but they did land.
     
  7. Forgues-Research

    Forgues-Research 150cc

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    be careful here , any transmission noise cannot be protected by fiber optics, the receiver antena will pick it up, but on the other hand, 2.4 is very good for this.

    What it does, is it will isolate the receiver from any electrical feed back , will give you more voltage on the servo signal wire, no loss of signal with extra long wires , remember light does the trick
     
  8. acerc

    acerc 640cc Uber Pimp

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    The electrical feed back was what I was referring to. I am sure you are well aware of the possible feed back from the on board electronics, many of which could easily generate if something went wrong internally. Not having the pathway back to the Rx would be ideal. I understand that the Rx antenna will always be subject but that is a risk we can't eliminate. I had a smoke pump go south in a manner that caused all kinds of jittering of the servos, I was fortunate not to have crashed. Your system would eliminate this kind of feed back from any component such as the fiber optic kill does for the ignition.
     
  9. Forgues-Research

    Forgues-Research 150cc

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    Your exactly right, I justed to make sure it was clear so others reading this wouldn't get the wrong message
     
  10. stangflyer

    stangflyer I like 'em "BIG"!

    Please read again. You are partially correct in the operation of the SF. The board supplies a constant non interrupted 5.0 volts to the rx. (Nominally) However, the board isolates the rx. signal through filters and thus there is absolutely no chance of feed back from the signal lead to rx. The board then supplies exact supplied voltage to the servos of which are plugged into the board. At least this is my understanding from Bob Ritchie of Smart Fly. I have been using SF boards on every giant scale airframe I've ever owned for the last seven years. As for a servo dumping, the redundancy is designed as a back up insurance policy. I may be incorrect, however I believe...(not certain) they are designed with over amp protection. Something I may need to discuss with Bob. At any rate, Roger's system is the most secure I've seen to date. And yes...adding a power expander in place of a servo buss would absolutely be the most robust and bullet proof system I can think of.
     
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