Just for what it's worth, I have and fly a BVM Chengdu J-10, which is similar to the SAAB JAS 39 Gripen, and I have it set up on two Bavarian Demon Cortex Pro gyros. One is for the canards only and the other for elevons, rudder and nose gear.
We tried to do it with one but when the gyro was set so it would have any damping effect it would cause the canards to fight the elevons setting off a feedback loop that, if left on, could destroy the aircraft. With two gyros that have been properly programed and controlled by their own switch, all of the control surfaces work with each other with the added bonus of being able to do high alpha maneuvers like the cobra and still be in complete control. By the way this model does have thrust vectoring as well.
We tried to do it with one but when the gyro was set so it would have any damping effect it would cause the canards to fight the elevons setting off a feedback loop that, if left on, could destroy the aircraft. With two gyros that have been properly programed and controlled by their own switch, all of the control surfaces work with each other with the added bonus of being able to do high alpha maneuvers like the cobra and still be in complete control. By the way this model does have thrust vectoring as well.
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