I am helping a friend program his JR 9303 radio for a CARF Eurosport which has canards. The cannards are mixed to the elevator (elevator - Aux 2). He wants the throw of the canard to be a higher percentage of the throw of elevator when the elevator is on high rates versus when the elevator is on low rates. I am not clear how to accomplish this. As best I can see, you can only mix at one percentage.

For example he wants the canard throw to be 25% of elevator throw when his is on low rates, but he wants the canard to be 40% of elevator throw when he goes to high rate.

Any suggestions?

i believe you will have to do another mix. so say the canard servo is plug into aux 4- you would do an aux 4 to aux 4 mix and then use the elevator dual-rate switch for the selector. and use the percentage value for the right switch direction to get the extra surface deflection.

I used to have mine setup that way, but finally eliminated it, as i found i fly with the canards on high rate all the time anyways.

hmmm . . that makes sense conceptually, though I do not recall any of the mixes allowing me to assign the mix to the elevator switch. I will have to go back and check.

They may not, In which case you'd probly have to have another switch, but like I said, I just quit using dual rates on the elevator and canards and fly with a single rate now.

The more I look through the 9303 manual, I am suspecting that "flight modes" is going to be what we need to get what we want.

I use flight modes to control the canard mixing on my Gripen. I don't do exactly what you have in mind. I have three canard settings on the 3 position switch; full travel, half travel, and off. I never use low rates. For take off and normal flying I use full canard travel, for landing I switch to half or zero canard travel. I don't know about the Eurosport, but the Gripen will porpoise easily if you have too much canard throw when landing.

You could have two different canard mixes using your Mix Switch. I don't know of a way to do exactly what you want since the Elevator Dual Rate Switch is not available to control any mixing. It may be possible with flight modes but then the flight mode switch would act as your elevator dual rate switch and you'd have to make sure it doesn't do something funny if the real elevator dual rate switch is in the wrong position.

Joe

From what I have read, you have the ability to tie all dual rates to the flight mode (versus the individual rate switches) if you wish. I think this is what we will probably do. Low rates on all sufraces will be one flight mode, and high rates on all surfaces (with increased throw on the canards) will be another flight mode.

I have my EF Canard mix with the flap channel, First position flaps for AOA takeoff, Second is for AOA landing.