Trimming your Aerobatic Model - RC World

Note the master channel is the first channel listed, and the slave is the second channel listed – both are preset to throttleby the mixing logic. I recommend you start by setting the correct master and slave channels, which in our case themaster is the rudder, and the slave is the elevator. Then, zero out all of the mix ratios at each programmable point (i.e.Point- 0, Point- 1, and so on). When you’re done, the page should look like this.If you choose to switch your mixes on and off, now would be a good time to do so. There is a switch select icon on theleft side of the screen for this purpose. I, however, recommend leaving the mix on at all times. There are very fewinstances where this will present even the slightest problem, so the simplicity allowed by eliminating the need for anyadditional switching just makes sense.With the base mix menu set, it is time to adjust the values. In general, most small models require less than 10% mixingin either the pitch or roll sense. I would recommend starting with a small mix of 2-3%, followed by a test flight and furtheradjustments. The final numbers on the Yak were slightly higher than my initial estimate, so after test flying several times,I ended up with a rudder/elevator mix screen that looks like this.Looking at that screen, you’ll notice the two mixes aren’t exactly the same. One direction has slightly more mixpercentage than the other, and this is completely normal. It is rare that models need the same mix with rudder in bothdirections. Also note that the mix is basically linear, i.e. at full deflection, the mix point is 8, then at 2/3 deflection its 5,and at 1/3 deflection it is 3 – basically a straight line on the graph. The beauty of the 9303 is that it allows me to preciselyfine-tune the mix to match my airplane perfectly with its multi-point mix curve.Rudder/Aileron Mixing – JR 9303I generally use the second P-mix for rudder/aileron mixing and use the exact same technique for rudder/aileron mixingas I did for rudder/elevator. Start by activating the mix, setting the master and slave channels, and zeroing the mixvalues. Your screen should look like this.