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Set-up and flying tips
Start by balancing your aircraft on the center of the carbon fiber wing tube. There is
plenty of room on the battery tray to move your battery to achieve this CG location. This
is a safe place to start and depending on your flying style you can adjust the position of the
battery to alter the CG to accommodate your flying style. For this type of aircraft where I
am going to predominantly fly aggressive 3D I typically set the airplane up with a neutral
CG, meaning that when the aircraft is flown inverted straight and level it requires no
down elevator to maintain altitude. If your flying style leans more toward precision
aerobatics then I recommend setting your CG using the 45 degree line test. Fly the
aircraft from left to right or right to left, whichever direction you are more comfortable
with at 3/4 to full throttle. Pull the aircraft to a 45 degree up line and establish this line
and immediately roll the aircraft inverted. Establish this line and let go of the elevator
stick. Ideally the aircraft will continue to track on that 45 degree line for several hundred
feet before slowly starting to level off. Adjust the position of your battery to achieve this
flight condition. Once satisfied with the location of your CG scribe a mark on the battery
tray so that you can position the battery in the same location each flight and achieve the
same feel and flight characteristics each flight.
I also highly recommend taking the time to properly set up your rates and exponential
settings. Setting up low rates for precision maneuvers and high rates for aggressive
aerobatics and 3D flight will allow you to experience the best attributes of the Extra
300EXP or any aircraft for that matter. The included elevator servo arm will allow for
close to 80 degrees of throw! While this is great for really aggressive tumbling maneuvers,
positive and negative waterfalls and straight down dropping elevators, it can wreak havoc
on stable harriers, especially if you are just learning the maneuver. If your radio will
allow I suggest setting up 3 elevator rates or a flight condition that will allow you a rate
for precision flying, another for harriers and the majority of 3D maneuvers and a final
rate with as much travel as you can get for the crazy tumbles and flips.
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