crow mix biplane

[hayesjl77]

I have a Reactor Biplane that I built and have been flying for a while now and I find myself in a need for some flap mix / crow mix.

I have DX8 radio and AR8000 receiver.

each aileron has its own servo
elevator has left and right servo
Rudder is a single servo

How would I go about setting up flaperon and a crow mix to a switch I am open to suggestions.

Currently I have a mix for top ail flaps but thats using up all 6 mixes. Im sure there has to be an easier way.

Thanks!

[Larry3215]

Crow is going to be challenging to program on a bipe.

Normally crow is when the ailerons go UP while the flaps go DOWN. This assumes outboard ailerons and inboard flaps - which most bipes do not have.

I suppose you could try to make the top ailerons go up and the bottom ailerons go down, but if the wings have any stagger or un-equal sweep, that could get harry with pitch changes.

I dont have any idea if the DX8 has enough mixes to do that. You would need another 4 free mixes I think.

Normal Crow mixing probably wont work. Its also sometimes not available for power models.

On second thought... you micht try setting it up as Crow first - then add mixes to get the ailerons to all go the correct directions. Might take one or even two less mixes. You may need to change the model 'type' to glider from power. If you do that, be prepared for other things to change. On my Futaba, there are several type of glider options available. You will want one with a 4 servo wing option if thats available.

[Larry3215]

Let me give you a couple more tips.

Flaperons should be a lot easier than crow.

Set up one wing with normal ailerons and activate the flaperon mix. Get that adjusted to where you like it. Then add 2 mixes to link the top and bottom servos on each side. You probably wont have trims carry over to the lower wing, but maybe they will.

For crow, start like above - set one wing up with normal ailerons. Then look in your manual to see how the Crow mix is expecting the flaps to be set up and plug them into the appropriate channels and go from there.

Hope that at least gets you started.

I think your radio is going to be your limiting factor though - I doubt you have enough mixes to do what you want.

[Old Fart]

Doubt it can be done with the DX8. I know it can't be done on a 9303 - but is easy on a 12X

[hayesjl77]

they way I have it now not enuogh mixes. I have 6 avail mixes.

right now :

top left aileron is in AIL
top right is AUX 1
Bottom Left is Aux 2
Bottom Right is Aux 3
Elevator 1 is in ELE
Elevator 2 is in gear

MIx 1 is tying the two elevators together
Mix 2 is tying the top right and left together
MIx 3 is tying bottom left and top left together
Mix 4 is tying bottom right to bottom left
Mix 5 is able to assign top LEFT AIL to down on a switch
Mix 6 is able to Assign top RIGHT AIL to down on a switch

need 2 more mixes to be able to raise the other 2 AIL on switch.

someone suggested setting wing mode to 2 flap where top 2 AIL would be normal AIL and bottom 2 would be flap mode then adding 2 mixes to make them Flaperon. and then use last 4 mixes for crow on switch might work if I was able to chain the two elevators together with a Y harness not sure. Just got back from flying and the setup above dont work because I dont have a extra mix to add elevator adjustment to counter act the lift I get when I set top two down.

[hayesjl77]

Originally Posted by Old Fart

Doubt it can be done with the DX8. I know it can't be done on a 9303 - but is easy on a 12X

ya i seen the somenizi download for the beast on the 12x which has the crow for biplane 1500$ airbrakes tho +)

[Larry3215]

Originally Posted by hayesjl77

they way I have it now not enuogh mixes. I have 6 avail mixes.

right now :

top left aileron is in AIL
top right is AUX 1
Bottom Left is Aux 2
Bottom Right is Aux 3
Elevator 1 is in ELE
Elevator 2 is in gear

MIx 1 is tying the two elevators together
Mix 2 is tying the top right and left together
MIx 3 is tying bottom left and top left together
Mix 4 is tying bottom right to bottom left
Mix 5 is able to assign top LEFT AIL to down on a switch
Mix 6 is able to Assign top RIGHT AIL to down on a switch

need 2 more mixes to be able to raise the other 2 AIL on switch.

someone suggested setting wing mode to 2 flap where top 2 AIL would be normal AIL and bottom 2 would be flap mode then adding 2 mixes to make them Flaperon. and then use last 4 mixes for crow on switch might work if I was able to chain the two elevators together with a Y harness not sure. Just got back from flying and the setup above dont work because I dont have a extra mix to add elevator adjustment to counter act the lift I get when I set top two down.

If you need to, maybe you can reverse the horn on one servo and that will work. If not, you could switch to Hyperion Digital servos and get the programmer cable. You can then reverse the servo with the programming cable and your computer and no meed to mess with weird/dificult linkages.

A pair of Hyperion digitals and programmer will likely run you $80 or less total.

Well under that $1400 mark

[hayesjl77]

Update i just acheived crow mix.

Set wing type to dual aileron dual flap
2 mixes to make the flaps act like ailerons
3 mixes to make the crow 2 up 2 down
I was hoping for a bonus flap mix also but for some reason when I set flaps on then use the switch only 1 aileron moves. figure that one out later I got the crow I was looking for !

thanks for the brain storm lots of good input

[Larry3215]

Glad that worked out for you!