RF noise

Discussion in 'Install Articles & Guides' started by Buttface, Mar 1, 2012.

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  1. Apr 23, 2012 #61

    WrongWay

    WrongWay

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    I crashed my profile....

    It only had one battery in it....





































    I took my eyes off the plane at the bottom of a loop.... hit the ground...
     
  2. Apr 23, 2012 #62

    JoeAirport

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    That's what we refer to in the electrical world as a ground loop. Heh heh.
     
  3. Apr 23, 2012 #63

    Tired Old Man

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    Should have made a smaller loop....

    There are some applications where a gas engine using a single battery has practical applications. However, I don't believe people trying to cram a small gas engine into a plane originally designed for a glow engine to meet those applications. Repackaging of any particular kit to add a gas engine to the preferred engine list doesn't make it either. There are a great many planes where a glow engine is still the most appropriate for the airframe, and because someone wants a lower operating cost does not justify the swap rfrom glow to a gasser. Which means, at least to me, that no batterypower should have been ever used at all for an ignition source. A lot of dealers are making some pretty good money from customer idiocy, but that has always been the case to some extent. If the plane had the engine type the kit was designed around it would not need a separate battery ignition source.

    I can definately see where a large profile using a gas engine would be looking for a way to shave a battery. There's no available room for things on a profile to begin with unless provisions are made to build compartments into the wing, which is typically an area ignored by the kit designers.
     
    Last edited: Apr 23, 2012
  4. Apr 26, 2012 #64

    fzappa

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    Hi, i´m planning to build a plane with an IBEC, i friend has an osiloscope, will be testing the noise, according to Aero-Tech, that IBEC has less noise than a servo. I will post the results.

    Regards,
    Felipe.
     
  5. Apr 28, 2012 #65

    Shawnlh

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    Looking forward to your results Felipe.
     
  6. Apr 28, 2012 #66

    JoeAirport

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    Make sure the engine is running. This the first I've heard of somebody putting a scope on their plane. Cool.
     
  7. Apr 30, 2012 #67

    shauntot

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    Looking forward to the results Felipe, I'm using an Aero-tech IBEC myself.
     
  8. Apr 30, 2012 #68

    Mithrandir

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    For some reason, I seem to recall that battery is a pretty good filter all on its own....

    has anyone just done a direct connect from the system battery directly to the ignition?


    (I tend to try and keep things "Simple"... and to me simple is a 5 cell 2000 mah Nimh and a seperate switch)
     
    Last edited: May 4, 2012
  9. May 1, 2012 #69

    3daviator

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    The best way to do it................. (just kiddin T.O.M :D )

    But as an alternative to the IBEC and to answer Mith, Yes, I've been running my 50cc on one A123. I have one deans and two JR's coming off the battery, Deans supplies the RX, One JR to charge port and the other JR powers the Smart Fly. I've had no problems except when I accidently hit the ign switch on the transmitter :)

    I'm planning to run the Tech Aero IBEC in the 35% I'm putting together now. I've seen a few poor installation with the IBEC located too close to the reciever, the noise is still on the wire until it goes thru the IBEC. I'm not saying it can't/won't/hasn't failed but, proper installation will certainly help. If it fails I'll report back.
     
  10. May 1, 2012 #70

    fzappa

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    Yes the test will be with the motor running in differents rpms. Also will be measuring the noise of the servos, with and without torque.

    posting the results and hope a video of the results.

    Regards Felipe.

    ps: sorry for my english maybe you think i'm tarzan. :smash:
     
  11. May 1, 2012 #71

    RH1N0

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    IBECs are evil. I tried one and listen to what it did to my ignition:

    <iframe width="420" height="315" src="http://www.youtube.com/embed/WR9ymz_1dxg" frameborder="0" allowfullscreen></iframe>
     
  12. May 1, 2012 #72

    WrongWay

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    Well, sooner or later it would happen.

    Here is a flying buddy that had one battery serving the ignition and the receiver...

    He crashed it...

    [ame]http://www.youtube.com/watch?v=LYtncvYHtXY[/ame]
     
  13. May 2, 2012 #73

    3daviator

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    :D that tends to happen when the battery flys out! didn't look too bad, did he fix it?
     
  14. May 2, 2012 #74

    WrongWay

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    Fixed and flew 4 days later..

    [ame]http://www.youtube.com/watch?v=EaxCx4KKDO8[/ame]
     
  15. May 2, 2012 #75

    BRUTUS

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    Dude can wring out a flattie! I've never seen anyone do a rolling loop with a profile before- nice!

    That was funny- Wahoo, "Sooner or later...." I thought the IBEC failed and crashed his plane! But NO the battery departed... Not exactly what I was expecting...:rolleyes2:
     
  16. May 2, 2012 #76

    WrongWay

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    Skeet happens..
     
  17. May 4, 2012 #77

    kygreen229

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    Ever since I got into gassers I went straight to the Tech-Aero IBEC on my 50cc Slick and it has been flawless so far Buttface!
     
  18. May 4, 2012 #78

    BVargas

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    Back in the day I kept every thing as far away as I could from the magneto type engines and ignition boxes of today and I still practice that today,,, even with this 2.4 stuff.

    The K.I.S.S. principal prevails every time :biggrin:

    BV
     
  19. May 4, 2012 #79

    Tired Old Man

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    A large portinion of the separation requirements were generated during the days and use of magneto ignition systems. The early CDI ignitions offered only marginal improvement. However, over the last 12 years or so both ignitions (reputable ones) and radios have evolved considerably, minimizing many of the early separation concerns. It's funny to read from so many that are up to date and expert with almost every new technological advancement but see them list requirements that were established for products generally no longer in use.

    The high tech 3d guys use ancient warbird rules and requirements while complaining about the warbird folks that developed the tenichniques. It really is pretty amusing. One thing remains fairly constant though, even the high tech companies isolate their ignition systems at multiple levels from their primary power systems.
     
    Last edited: May 4, 2012
  20. May 4, 2012 #80

    RTK

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    On one of my smaller planes I ran the ignition off of a pig tail on the same receiver battery, did this for weight savings. Never had a problem, range check engine on/off was excellent. All the switches, batteries, and RX were all within inches of each other. I don't recommend everyone doing this, but it worked fine for me.
     

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