OK, whilst a video is trundling through processing on my archaic computer I'll tell you where I am.
In effect, what I was thinking of above is correct. I now have a gyro, and frankly it's making me think of all sorts of opportunities.
In the video I fire up the radio on my proto twin boat with a spare servo in sight. On this particular gyro (maybe the same for all) it takes a few seconds from power on for it to set itself, the model must be still during this. A red indicator comes on when it's happy. I then move the gyro in the plane it was designed to operate, horizontal movement around a vertical axis, and you can see the servo reacting to the movement. I then move the gyro to a position where it detects pitching movement around an athwartships axis, or across the boat, which is the way to control take offs. So looking forward, the gyro has been tilted to the left or right. I then power it up again and show that pitching movement now moves the servo.
I've got the gyro set to maximum sensitivity gain for this demo, so that servo movements are obvious, but this makes it twitchy. On this device, you can either dial that in by adjusting an inset pot screw, or control the gain from the transmitter. In my case I'll be using the left stick left-right movement, which is nothing on the airboat at the moment, but in the Uk would be an aeroplane rudder. By using the electronic trim switch, which on this radio gives me full servo movement, I will have gain adjustment under way by punching the trim switch.
Looking at this video it comes across as a setup, like I'm working the transmitter off screen
. Take it from me, I'm not
I'm immediately thinking of fitting one to the rudder on an airboat as well. Weathercocking is clearly an issue with air rudders if there is little in the way of spray rails or other aligning features on the hull, and I'll be trying this first, because my proto twin boat is not likely to suffer from trying to be airborne, hence pointless for now. It'll be interesting to see if the gyro can keep the boat on a drifting path automatically. My final boats though will however probably benefit from pitch control, but as I said I'll not be getting to that for a few weeks.
Add a third gyro and you'll have all three axis covered. So long as the designed control surfaces are effective and gel well with the gyro, the boat could be made to sit flat whatever it's doing. We'll see perhaps.
I'm off to put some more coal in the computer, I'll post a dedicated link to the vid as soon as able.