Extreme Flight RC YAK-54 EXP, Manual

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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 YAK-54 EXP 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.
Here are some suggested rates to get started with. These are the rates and
exponential values I feel comfortable with. They may feel awkward to you
and if so please adjust to your taste.
Elevator: Low rate-8-10 degrees; 15-20% Exponential
3D rate-45-50 degrees; 40-50% Exponential
Insane tumble rate: As much as possible! 65-70% Exponential
Rudder: Low rate-20 degrees; 45-50% Exponential
3D rate- As much as possible; 60-70% Exponential
Aileron: Low rate-15-20%; 40-45% Exponential
3D rate- As much as possible; 50-60% Exponential