RCU Review: Cox Wings- Christen Eagle

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    Contributed by: Greg Covey | Published: January 2007 | Views: 57667 | email icon Email this Article | PDFpdf icon
    COX Christen Eagle ARF

    Review by: Greg Covey
    Flying Photos: Papa Jeff Ring
    Video Pilot: Lynn Bowerman



    Cox Hobby Distributors

    PO Box 274
    Penrose, CO 81240

    Ease of Assembly

    • Easy to Assemble
    • Motor, ESC, and Battery Included
    • Great ARF value
    • Excellent Flight Response

    • No balancing connector on LiPo pack

    Cox Wings- Christen Eagle

    Cox Models has a new line called "Wings" which, among other designs, has a licensed Christen Eagle® ARF. Molded in EPS foam and colorfully decorated in the classic Eagle colors, this exciting aerobatic model comes almost ready to fly, with the brushless outrunner motor and brushless ESC pre-installed. Further, the ARF kit also includes a 3-cell 1800mAh LiPo pack! The model comes complete with servo installation hardware, extra prop and only requires 3 sub-micro servos with approximately 17 oz.-in. of torque and a 4-channel radio system.


    • Wingspan: 33.6" (85.5cm)
    • Length: 28-3/4" (73.8cm)
    • Flying weight: approx. 24oz (680g)
    • Wingloading: 8.0 oz/sq2 - 9.0 oz/sq2
    • 110-Watt Brushless outrunner motor installed
    • 18-amp sensorless electronic speed control with BEC installed
    • 3S, 11.1 volt, 1800mAh LiPo Battery included

    All that is needed to complete the ARF are the following items:

    • 4 channel transmitter and micro receiver
    • 3 micro servos 17oz/in torque
    • hobby supplies like glue, servo tape, razor knife

    ARF Kit Parts


    The COX Christen Eagle comes very well packaged in a box that has a built-in handle making it easy to carry. The custom foam inside the box is formed to the planes shape giving it good support for shipment without damage. Most of the assembly is all done for you. All tail parts are mounted and glued in place and appeared to be straight. The main plastic wing cabanes have wire reinforcement inside them.

    The control surfaces are hinged and the control rods are pre-installed. I did find the elevator and rudder were stiff and hard to move. This is easily fixed by disconnecting the control rods and moving the surfaces back and forth several times to the full length of travel. The procedure seemed to get things moving much easier.

    The motor, ESC, cowl, prop, and spinner come pre-installed. The ESC even has a mating Dean's Ultra connector already soldered on it and is ready to plug into your battery pack and receiver.

    To complete the ARF, I am using 3 Hitec HS-55 servos and an M5v2 micro receiver from FMA Direct.



    The assembly starts with a very simple servo installation. Cox supplies the servo arms that are already on the pushrods but the arms didn’t fit on my HS-55 servos. If you choose to use HS-55 servos, there will be no need to modify anything to make them fit as the servo mounts perfectly. When installing servos into the fuselage, there are openings in the bottom of the servo mounts for routing the servo wires. This will guide the wires right to the receiver location. The HS-55’s fit nice and snug in the foam servo mounts. Cox recommends that you install a foam wedge between the servos to help hold them apart. I used a piece of foam from the box that the Christen Eagle came in. After the servos were in place I used a drop of ZAP-O(tm) foam safe CA on each servo tab just to make sure the servos were going to stay still.


    Inside the fuselage above the bottom wing opening there is a little pocket where the rudder and elevator servo wires arrive. I decided to use the M5 v2 receiver from FMA Direct because of its full strength dual conversion performance. To install the receiver, all you have to do is turn it on its side and it will fit snuggly into the little pocket in fuselage. Since the installation and removal of the receiver is so easy, I was able to hook the aileron servo lead into the receiver and slide it back into place without the need for an extension cable.

    Aileron Servo:

    When installing the aileron servo, the HS-55 fit in the pocket perfectly. Again, I added a drop of ZAP-O(tm) foam safe CA on each servo tab. The pushrod wires come completed so just hook them up and adjust as needed to center the ailerons. After you have installed the wings and hooked up ailerons you may need to adjust the ailerons again. I found that with the added weight of upper ailerons, it made the lower ailerons droop down a little.

    Aileron Linkage:

    The aileron control horns come pre-installed on wings. The control horns work very well and seemed plenty strong. When installing the clevises to the control horns, be careful not to side load them as they may break if too much force is applied. The pushrod wires also come pre-assembled and needed only one turn on the clevis to make the ailerons line up perfectly.


    The dashboard and cockpit graphics come pre-installed.

    The canopy comes completely finished and ready for installation. Simply remove the cover paper from the two- sided tape and stick canopy to it. It is best to check the alignment on canopy before installation as you only get one chance to have it fit properly.

    Landing Gear:

    Installing the main gear is very simple. The wire simply slides into the slot on the fuselage bottom and snaps into place.

    The tail wheel comes pre-installed so it is all ready to be used. As long as the grass is kept fairly short, the Eagle will take off and land without issue.


    My COX Christen Eagle ARF was ready-to-fly at 22.5oz using the supplied stock power system. On a freshly charged LiPo pack, we measured about 13.8amps or 150 watts at full throttle.

    Test Flying

    The COX Christen Eagle taxies nicely with its steerable tail wheel on smooth surfaces. It will also take off from a short grass surface. The stock power system does provide for very capable flight performance but it does not provide a 3D level of performance.

    CLICK HERE (5.3meg)

    The video of the COX Christen Eagle was shot on a rather grey day in November with winds from 5-10mph. The little bipe with the stock power system not only takes off and lands on grass but has the performance of a much bigger model.


    You won't be disapointed in the COX Christen Eagle. It is a great design and has excellent value for the $129 price. It comes almost completely assembled and decorated in the box. The ARF kit includes the motor, ESC, props, and a 3-cell LiPo pack.

    The only fault I can find on this ARF package is that the supplied 3-cell LiPo battery does not have a node connector for safe balancing. However, the battery does have a circuit board under the shrink wrap so it is an easy task to add your own favorite node connector to keep the pack balanced for better safety and longevity. I modified my pack to add a Cellpro brand pigtail from FMA Direct.

    The Eagle has a wide range of flight performance from more docile hands-off cruising, at half-throttle, to wild aerobatics, at full throttle. This will keep the pilot with advanced skills happily flying in a small soccer field area or challenge the intermediate pilot looking to advance their aerobatic capabilities.

    COX Christen Eagle ARF

    IManufacturer Info

    Cox Hobby Distributors
    PO Box 274
    Penrose, CO 81240
    Website: www.coxmodels.com

    FMA Direct
    5716A Industry Lane
    Frederick, MD 21704
    Website: www.fmadirect.com
    Sales: 800-343-2934 or 301-668-7614

    ZAP Glues On-line at Frank Tiano Enterprises
    Pacer Z-42 Thread Locker
    5-minute Z-poxy
    Pacer POLY ZAP(tm)

    Comments on RCU Review: Cox Wings- Christen Eagle

    Posted by: bdelmonte on 09/18/2008
    Cox Wings Christen Eagle is a wonderful park flyer that I am greatly enjoying. How do I install a Cellpro by FMA or other brand pigtail to the circuit board under the shrink wrap of the Cox LiPo battery?
    Page: 1
    The comments, observations and conclusions made in this review are solely with respect to the particular item the editor reviewed and may not apply generally to similar products by the manufacturer. We cannot be responsible for any manufacturer defects in workmanship or other deficiencies in products like the one featured in the review.

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