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This section describes our recommendations to help you in deciding which types of accessories to purchase for your
new Wild Cat 400 EP ARF.
Please read through this entire section very carefully. We have provided you with tips
and recommendations that, if followed, will result in a great flying airplane. Failure to follow our recommendations
may result in a poor flying airplane.
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IMPORTANT
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When choosing accessories for your Wild Cat 400 EP ARF, such as servos, ESC, receiver and other
related accessories, it's very important to take the weight of these items into consideration. Remember, the lighter the
overall weight of the finished airplane, the better the airplane will fly.
What Servos Do I Use?
The servos you use should be the lightest available, yet still have an adequate amount of torque. We suggest using servos
that weigh no more than 0.34 ounces and have a torque rating of no less than 11 ounces per square inch. Cirrus CS-6.2
servos, Cirrus CS-09 servos or Hitec HS-55 servos would be a perfect choice.
What Electronic Speed Control Do I Use?
The ESC you choose should be capable of handling no less than 30 amps continuous current. Again, lighter is better. Your
ESC should weigh no more than 1 ounce including the wiring and switch. We suggest using the Wattage IC-30A Micro
electronic speed control. This ESC is lightweight, easy to set up and can handle up to 30 amps continuous current.
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To minimize current loss, we suggest cutting off the bullet connectors from the Cobalt 400 motor and
your ESC, and soldering the motor wires directly to the ESC motor wires.
What Radio and Receiver Do I Use?
You will need to use a 4 or more channel radio system. The receiver should be as light as possible, preferably 1/2oz. or
less. Most four-channel micro receivers would be a good choice. We personally suggest using the Hitec 555 Micro
receiver or the Hitec Electron 6 Micro receiver. If you do use one of these receivers, we suggest removing the case to
reduce the receiver's weight. If you do remove the case from your receiver, we strongly suggest wrapping the receiver with
heat-shrink material to protect the internal components.
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We do not suggest using short-range receivers like the Hitec Feather or the Cirrus MRX-4II. The
range provided by these receivers will not be long enough for you to keep control of the airplane.
What Flight Battery Do I Use?
Through much testing with this power system and airframe combination, we have found that the best flight battery to use is
the Sanyo 7 cell CP1300SCR. This flight battery will work well and will provide you with good overall performance. The
CP1300SCR pack is ideal because it will provide great runtime without any significant weight penalty. We do not suggest
using NiMH battery packs. At this time they cannot handle the current draw of this power system.
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We strongly suggest replacing the stock Tamiya connector that is likely preinstalled on your ESC and
flight battery with a more efficient Dean's Ultra-Plug battery connector. The Tamiya connector is not able to withstand
the current draw of the high-power cobalt 400 motor.
SECTION 1: OUR RECOMMENDATIONS
IMPORTANT INFORMATION ABOUT THE COBALT 400 POWER SYSTEM
The airplane includes a 7 x 4 propeller that, when used with a 7 cell flight battery, results in a static amp draw of
approximately 25 amps. Using a larger propeller and/or more cells will result in an amp draw of over 30 amps, which will
cause failure of the power system. This is not recommended.
