DJRubberCow
Hey! Is it possible to program the DX6i in such a way, that I can mix my rudder input into two distinctive "throttle" channels?
What I want to do is make a plane steerable on the ground by using differential thrust on both engines. I fear this might be too much for my DX6i (GOD!!! why did they only include two mixers in that remote?!?).
My Videos: http://vimeo.com/jfrank
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Scrapdaddy
I can only answer your second question. A: You only paid for 2
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DJRubberCow
yeah... I hate this artificial limitation to push higher-priced objects... I'm ok if the hardware is the limit but come on you cannot tell me that the dx6i chip can't handle more than two mixes.... I would love to be able to patch my firmware... Something like OpenDX6 ^^
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Sonicjet
yep,the dx7 has 8 mixes,it does annoy me.
DFTBA!
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rodrigo
another reason to love my eclipse 7.... 5 custom mix program, plus elevon, flaperon, mix flaperon/elevator, mix rudder-aileron...
good luck!

tx Futaba 9CAP & 8U
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kaptondave
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Hey! Is it possible to program the DX6i in such a way, that I can mix my rudder input into two distinctive "throttle" channels?
What I want to do is make a plane steerable on the ground by using differential thrust on both engines. I fear this might be too much for my DX6i (GOD!!! why did they only include two mixers in that remote?!?).
Because you bought a cheap remote.

The twin hawk has been done already. This might help:

http://www.youtube.com/user/RCSuperPowers#p/u/24/JStfKGoAlXsd
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rodrigo
DJ.. do not worry about the tx, you can use a external mixer to do the same... look this:
http://www.rcgroups.com/forums/attachment.php?attachmentid=2928215
is really simple....

Anyway, I recommend a good mixer like GWS or this (much better and at the same price):
http://www.robotmarketplace.com/products/0-DGEVMXR.html

I bought this mixer and I hope to receive it soon... I probe this config and made a review
good luck!

tx Futaba 9CAP & 8U
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DJRubberCow
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Because you bought a cheap remote.

The twin hawk has been done already. This might help:

http://www.youtube.com/user/RCSuperPowers#p/u/24/JStfKGoAlXsd


I doubt you really understood what I'm trying to do. I want to differentiate the two motor powersettings so I can steer left and right by reving up one motor and reving down the other - Dave's video does not help on that since he's simply y-connecting both ESCs into the Throttle channel
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kaptondave
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I doubt you really understood what I'm trying to do. I want to differentiate the two motor powersettings so I can steer left and right by reving up one motor and reving down the other - Dave's video does not help on that since he's simply y-connecting both ESCs into the Throttle channel
I understood about the differential thrust but thought there might be useful information in the video anyway. Sorry to bother you.
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DJRubberCow
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I understood about the differential thrust but thought there might be useful information in the video anyway. Sorry to bother you.


No don't misunderstand me! I'm thankful for every input, just trying to get the people in line here so that some knowledge advancement can take place
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ScottLott
It's absolutely possible with a higher priced V-tail mixer, like the GWS one. The mixing can be done with only two mixes (One mix of throttle->rudder and another thats rudder->throttle, sub trim the rudder channel so its at -100 when neutral, and use the rudder channel as your secondary throttle channel) but I'm not sure if the DX6i is capable. If not, us a V-tail mixer hooked up to the throttle and rudder channel, plugged into the two throttles. Make sure you use identical power systems. Good Luck!
- Scott Lott
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DJRubberCow
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It's absolutely possible with a higher priced V-tail mixer, like the GWS one. The mixing can be done with only two mixes (One mix of throttle->rudder and another thats rudder->throttle, sub trim the rudder channel so its at -100 when neutral, and use the rudder channel as your secondary throttle channel) but I'm not sure if the DX6i is capable. If not, us a V-tail mixer hooked up to the throttle and rudder channel, plugged into the two throttles. Make sure you use identical power systems. Good Luck!


Thank you! I read a little into the DX6i and it seems that Spektrum says that the DX6i cannot slave the Throttle Channel (Rudder -> Throttle) - therefore, the 2-mixer version will not work properly, at least not on the DX6i. I only have a cheaply priced V-tail mixer (that 3$ hobbyking thingy) here, so I think this is ruled out. My only other option I have right now (without buying new hardware) is to once more utilize my Arduino and program it to be a differential Throttle mixer. The plane I plan to use it on will be big enough so that the extra weight of the arduino (50g!) is not so fatal.
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whatmovesyou
Try it this way.

1) hook first motor in throttle slot. (master)
2) put second motor in open channel (slave)
3) MIX 1 throttle -open channel leave on at all times (no switch) and use + or -100%
Check you motors that it operates.
The second mix is where you went wrong. You want rudder to open channel.(slave)
4) rudder - open channel - first make sure you put it on a switch so you can shut it off if needed.
5) set the % to about 15% for first shot. The object of the game is to get the right engine to reduce speed when right rudder is added. This is determined by either using the +15% or -15%. Once the proper sign is determine, set the opposite sign when you move the stick to the left.
Remember you reduce rpm's when right rudder is added for the slave motor.
The throttle can never be altered, the slave can.

If you go to the experimental section of this forum., look for Virtual Rudder Control for two motor plane. In fact, I'll do a video to explain it better.
I like to design and fly unique planes.
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