RCU Review: World Models Wing Jet EP


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    Contributed by: Greg Covey | Published: March 2010 | Views: 34966 | email icon Email this Article | PDFpdf icon
    The World Models Wing Jet EP

    Review by: Greg Covey
    Flying Photos: Papa Jeff Ring
    Video Pilot: Devin McGrath

    The World Models
    Wing Jet EP

    Distributed exclusively by:

    Airborne Models

    4749-K  Bennett Drive

    Livermore  CA 94551

    925-371-0922
    www.airborne-models.com


    Complete Kit with hardware
    Great ARF value and looks
    Parts Bags Numbered
    Strings included to pull servo wires
    Superb Covering &
    Flying Performance
    Spare Parts Available

    None
    The World Models - Wing Jet EP

    The World Models Wing Jet EP comes with a high-performance ducted fan propulsion unit powered by a high-speed outrunner motor. The wing has been redesigned with a stronger structure that combines with a sturdy fiberglass fuselage to handle any type of maneuver.

    The Wing Jet EP also comes with a dual purpose field stand that also acts as a launching dolly for ground take-offs. Just add your own 30-amp ESC, two micro servos, and a 3-cell 2100mAh LiPo pack to complete the kit.

    Specifications:

    • Wing Span : 39.5 in / 1000 mm
    • Wing Area : 301 sq in / 19.4 sq mm
    • Flying Weight : 22 oz / 620 g
    • Fuselage Length : 17.5 in / 440 mm
    • Radio Required : 3-channel "mixing" radio (elevator and aileron)

    Key Features:

    • Painted fiberglass fuselage
    • 70mm Ducted fan propulsion unit included
    • Outrunner motor included
    • Dual purpose field stand included
    • Built-up two-piece wings with symmetrical airfoil
    • All necessary hardware included
    ARF Contents

    The Wing Jet EP comes very well protected in its box and every part is sealed in plastic. The plane is beautifully covered with a custom print design. The kit includes built-up wing halves and two vertical stabilizer fins.

    The fiberglass fuselage is painted and comes with a canopy that has the latch pre-installed. The sturdy fuselage also has pre-installed mounts for the ducted fan unit.

    A 70mm Ducted Fan Propulsion Unit (PL6800010) and 28/31/3600 outrunner motor (KM0283110) are included in the kit. An innovative dual purpose field stand that also acts as a launching dolly for ground take-offs is also included. The Wing Jet EP manual has detailed drawings and instructions to properly guide you through the assembly. It clearly states the proper throws and CG settings.

    ARF Assembly

    The assembly starts with the aileron servo bays. The ailerons were attached with Zap thin CA on the hinges after first removing the short string pieces used to keep the hinges in place during shipment. The thin CA soaks into the fiber hinges and then into the balsa slots for added strength so remember not to use any CA kicker accelerator on this step.

    I used E-flite S-75 Sub-micro servos and the "03" series of plastic servo mounts. All the linkage hardware was supplied including the keepers. The kit comes with three different sets of servos mounts to handle most servo sizes. The numbers are marked on the plastic servo mounts for easy identification.

    Note that strings are included inside the wing to pull the servo leads from the bay to the center. Tiny 1.7mm x 8mm screws were provided to mount the servo trays.

    The wing halves are aligned and supported by a metal tube along the CG and a wooden dowel near the trailing edge. A second string is provided on one side to route a 72MHz receiver antenna wire inside the wing, if needed. I glued the two halves together with 5-minute epoxy.

    The vertical fins have an innovative technique for installation. A Nylon lock nut is already installed in the fin so it simply screws into place from the bottom side of the wing. This makes them removable, if needed, for easier storage or repair.

    EDF Assembly

    Assembling the 70mm Ducted Fan Propulsion Unit (PL6800010) and 28/31/3600 outrunner motor (KM0283110) was straightforward and well documented in the manual. The rotor is secured to the outrunner motor by three M2x5mm screws and the outrunner motor is held to the DF unit by four M3x6 screws. The front spinner/ring assembly and tail cone were glued in place with medium CA.

    I used a Castle Creations Thunderbird 36 ESC which required no programming. The ESC can handle 36 amps continuous current draw on a 3-cell LiPo pack. It was a perfect low-cost fit for this application.

    The DF unit was first tested for proper spin direction and then mounted into the fuselage using the supplied screws and locknuts. I used several tywraps to keep the wires held in place and a Spectrum AR6100 receiver. Both the receiver and ESC were attached to the fuselage side with servo tape.

    Battery and CG

    The WingJet is designed to use a slim 3-cell 2AH flight battery like the ThunderPower 3s 2100mAh pack. It is held in place with a Velcro strip on the bottom and a supplied Velcro strap around the pack. The WingJet EP balanced perfectly at 70mm (2.75") behind the leading edge where the wing meets the fuselage.

    Field Stand / Launching Dolly

    The field stand simply pressed together. There is a front and back side that has different size openings for the model to sit properly. Since it was still winter outside when we tested the WingJet, I didn't get a chance to use it as a launching pad on a hard surface. I think this accessory is a very novel idea any way you use it.

    Ready-To-Fly!

    My WingJet EP was ready to fly after attaching the wing to the fuselage with the supplied 2.5x20mm screws and washers. I didn't measure the weight or power system but my power level sanity check revealed that it would have more power than needed. Simply hold the model out at arms length and feel the power at full throttle. If it feels like you have more thrust than model weight, you are good to go!

    The control throws were set per the manual using +-6mm for elevator and +-6mm for aileron with a combined throw of 12mm when both elevator and aileron are applied in the appropriate direction. Note that elevon mixing is required. We used about 40% exponential on both elevator and aileron to soften the stick centers.


    It was a grey day in winter when we tested the WingJet EP. Although I didn't measure the power system, the full throttle thrust felt to be much more than needed so I wasn't concerned. After a good toss at a slightly upward angle, the WingJet took off with authority and was ready to get trimmed out.

    The video shows the wide range of flight that can be performed by the WingJet. The pilot, Devin McGrath flew the WingJet inverted and performed rolling circles. The WingJet can fly strong fast passes or calmly glide by without any motor power.

    WingJet EP Test Flight
    Download and Watch in Windows Media Player here! (14 MB)

    The Wing Jet EP just glided in for a landing after cutting the power on the final turn. We saw no tendency for the WingJet to tip stall and it performed aerobatics without issue. A quality digital sub-micro servo would be a good choice on this model for those wanting precise control.

    I would recommend the WingJet to any intermediate or advanced flyer looking for a unique design wing that will stand out from the typical foam designs. Its fiberglass body, print-film covered wing, and combination Field Stand/Launching Dolly all make the WingJet EP ARF an innovative package to own.



    Airborne Models
    4749-K  Bennett Drive

    Livermore  CA 94551

    925-371-0922
    www.airborne-models.com

    ZAP Glues On-line at Frank Tiano Enterprises

    Zap Thin CA
    Pacer Z-42 Thread Locker
    5-minute Z-poxy
    Pacer POLY ZAP(tm)

    Comments on RCU Review: World Models Wing Jet EP

    Posted by: poot77 on 03/27/2010
    A second review of the same plane? Sweet. Nice plane Greg.
    Posted by: billco on 03/28/2010
    A really good review well laid out
    Posted by: sanman55 on 04/05/2010
    very nice,,clean ,compact and good power with low amp draw...me likey..
    Posted by: EINA on 05/17/2010
    Mine is 2 or 3 years old, looks like they've changed the fins mounting method, hope the fan and motor is still the same
    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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