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  1. #1

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    Spectrum DX18 non-control surface functions

    Hello everyone,
    I was just wondering about the x- plus 8 module.
    I understand that things like ailerons, rudders, elevators, are your primary controls but, what about the following.
    Throttle
    Flaps
    Thrust vector servos
    Kill switches (ECU)
    Could the above control be plugged in to the Module. I would think the Kill switches can but not sure about the other three.
    I also do realize you can put landing gear, lights, canopy etc.
    Your help would be much appreciated.
    Ivan
    If you have to borrow, you cant afford it

  2. #2
    madmodelman's Avatar
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    RE: Spectrum DX18 non-control surface functions

    You can plug anything into the expander, all channels are proportional but the refresh rate is a little slower, hence primary flight controls want to be on the main receiver.
    Stuka, P51, Super Chipmunk, Super Stearman R170, BE2e, Javelin, F16, L39, F86, Viperjet and at long last an F4!!

  3. #3

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    RE: Spectrum DX18 non-control surface functions

    Thank you for the reply,
    But what im not sure about is the throttle, Flaps , thrust vector servos.
    Would these be classed as primary controls.

    Ivan
    If you have to borrow, you cant afford it

  4. #4
    Dr Honda's Avatar
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    RE: Spectrum DX18 non-control surface functions

    I would say no on the thrust vector, or throttle, since they are primary controls. I would say flaps are OK since they are generally run slow anyway. (they are on a delay)
    Tony

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    madmodelman's Avatar
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    RE: Spectrum DX18 non-control surface functions

    The difference is 2048/1024 between rx and expander, you would not notice this difference on the thrust vector or anything else for that matter. It's still fast.

    I would personally consider that elevator, ailerons, rudder and throttle should be on the main reciever, anything else would be fine on the expander.
    Stuka, P51, Super Chipmunk, Super Stearman R170, BE2e, Javelin, F16, L39, F86, Viperjet and at long last an F4!!

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    RE: Spectrum DX18 non-control surface functions

    The difference is 2048/512 between rx and expander.

    Doug.

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    RE: Spectrum DX18 non-control surface functions

    A key point to remember - as of right now, IIRC, the failsafe on the expander channels is "HOLD" only.

  8. #8
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    RE: Spectrum DX18 non-control surface functions

    You want to put the throttle and flaps into the main receiver as well.
    Greg Wright
    Not a Team Horizon member/ But would love to be one!!!!!!!!!!!! BVM Jets/Jetcat USA

  9. #9
    madmodelman's Avatar
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    RE: Spectrum DX18 non-control surface functions

    I stand corrected Doug! Same principle though.

    Gary.
    Stuka, P51, Super Chipmunk, Super Stearman R170, BE2e, Javelin, F16, L39, F86, Viperjet and at long last an F4!!

  10. #10
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    RE: Spectrum DX18 non-control surface functions

    ORIGINAL: Greg Wright

    You want to put the throttle and flaps into the main receiver as well.

    I attempted to use the 9ch RX with the Xplus on my recent Dragon build. I did not like the way the flaps responded to the radio inputs on the Xplus. Appeared sluggish and inconstant from one side to the other. I was using separate channels for the flaps. Went with a 12 ch RX so that I had all 12 chs @ 2048 and the flaps worked liked they should.

    I would not use the Xplus on any flight surface - a single surface airbrake would be ok I guess. I would consider the vector control a flight surface since it is used to help with pitch and yaw, I would would want everything to work in conjunction with each other there.

    A 12 Channel RX would give you all 12 channels @ 2048 despite what the Futaba ads proclaim.
    Jet Central Rabbit, Cheetah, and a Rhino.
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    RE: Spectrum DX18 non-control surface functions

    ORIGINAL: zonker123

    ORIGINAL: Greg Wright

    You want to put the throttle and flaps into the main receiver as well.

    I attempted to use the 9ch RX with the Xplus on my recent Dragon build. I did not like the way the flaps responded to the radio inputs on the Xplus. Appeared sluggish and inconstant from one side to the other. I was using separate channels for the flaps. Went with a 12 ch RX so that I had all 12 chs @ 2048 and the flaps worked liked they should.

    I would not use the Xplus on any flight surface - a single surface airbrake would be ok I guess. I would consider the vector control a flight surface since it is used to help with pitch and yaw, I would would want everything to work in conjunction with each other there.

    A 12 Channel RX would give you all 12 channels @ 2048 despite what the Futaba ads proclaim.
    +1

    My plan is to use the 12 ch rx and X-plus for ancillary features like speed brakes, cockpit, etc.
    Team Elite Aerosport

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    RE: Spectrum DX18 non-control surface functions

    Thank you Everyone for all your input.
    So if I used a 12 channel receiver with an X- plus module this will obviously give me 12 channels at 2048 and 6 channels at the slower resolution.
    Is this rite?
    Ivan.
    If you have to borrow, you cant afford it

  13. #13
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    RE: Spectrum DX18 non-control surface functions

    Ivan,

    By using a 12 channel receiver and the X-Plus8 it will give you 10 channels at 2048 and then 8 channels at the lower resolution.
    Greg Wright
    Not a Team Horizon member/ But would love to be one!!!!!!!!!!!! BVM Jets/Jetcat USA

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    RE: Spectrum DX18 non-control surface functions

    Hi Greg,
    At the moment I have a 12 channel receiver with the x-Plus module connected to it.
    This gives me 10 channel at 2048 and 8 channels on the lower resolution as you stated.
    I heir that I can get 12 channels at 2048 when a 12 channel receiver is connected.
    How do I do this with my DX-18? channel 6 and 7 seem to not be there.
    Also if I then connect my x- plus module wouldn't that then give me 12 channel at2048 and 6 channels from the X-plus module at the lower resolution.
    Not trying to argue with you, I'm just trying to understand my new radio.
    I still have my JR 11X but want to use the Spectrum DX 18 on my Mig and future Jets.
    Ivan
    If you have to borrow, you cant afford it

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    RE: Spectrum DX18 non-control surface functions

    Also when I change from 22ms to 11ms it states that all digital servos must be used.
    I am using all digital servos except for the servo operating the valve bank on the hydraulics.
    Will this cause me problems?
    Should I be changing it to digital ?
    I don’t mind changing to digital if I have to but considering I have a few non-digital servos in perfect working order I thought that a valve bank operation would be a waste to use digital.
    If you have to borrow, you cant afford it

  16. #16
    Greg Wright's Avatar
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    RE: Spectrum DX18 non-control surface functions

    Ivan,

    You will get the 12 channels if you do not use the X-plus8 but you still have to turn on the x-plus to activate the other two channels as AUX 6 & AUX 7 then and only then will you get your 12 channels on 2048. As far as changing from 22ms to 11ms you don't want to do that unless you are planning to do some 3D flying with your jet. It's not required that you change that because you will never need the servos the move that fast. Your AUX 6 and Aux 7 channels will now be X1 & X2. I'm still dealing with trying to figure this radio out myself but i have a few friends that work for Horizion Hobby here in the USA and i just give them a call for help. And Yes if you change to 11ms you would have to have all digital servos.
    Greg Wright
    Not a Team Horizon member/ But would love to be one!!!!!!!!!!!! BVM Jets/Jetcat USA

  17. #17
    BaldEagel's Avatar
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    RE: Spectrum DX18 non-control surface functions

    On the old expanding module the extra channels did not have a trim function, may be an idea to check this if you are going to use them on a primary control surface, just a thought.

    Mike
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    RE: Spectrum DX18 non-control surface functions

    Hello Greg, Mike,
    Thank you for the information.


    Ivan
    If you have to borrow, you cant afford it

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    RE: Spectrum DX18 non-control surface functions

    Sorted it all out. You can adjust all 12 channels, A little slow I now but im not to good when it comes to electronics , computers, etc.
    If you have to borrow, you cant afford it

  20. #20
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    RE: Spectrum DX18 non-control surface functions


    ORIGINAL: Justflying1

    Also when I change from 22ms to 11ms it states that all digital servos must be used. I am using all digital servos except for the servo operating the valve bank on the hydraulics. Will this cause me problems? Should I be changing it to digital ? I don’t mind changing to digital if I have to but considering I have a few non-digital servos in perfect working order I thought that a valve bank operation would be a waste to use digital.Β*Β*Β*
    Changing from 22ms to 11ms won't accomplish anything unless the receiver you are using supports 11ms operation. Also, even the receivers that support 11ms operation don't support it on all channels.
    This started out as a helicopter thing and is normally implemented only in the channels associated with swash plate operation. The DX18 added it to the rudder channel also but still not on all channels. Just leave the defaults in the transmitter and let it bind in the best mode for the receiver.

    Using analog servos on things like air valves, etc, won't cause you any problems.

    Wayne

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    RE: Spectrum DX18 non-control surface functions

    Thank you Wayne for the information.
    I will do just that.
    With all this new technology coming around the corner and hitting us in the face with all these settings its sometimes confusing LOL.
    Just when you think you are starting to understand a hole new stuff comes out
    Ivan
    If you have to borrow, you cant afford it


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