RCU Review: The World Models Super Taiji EP (40)


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    Contributed by: Burc Simsek | Published: July 2012 | Views: 17966 | email icon Email this Article | PDFpdf icon
    RCUniverse.com Review of the World Models Super Taiji 40 EP

    Burc
    Simsek






    World Models Distributor
    4749 - K Bennett Driver
    Livermore CA 94551
    www.airborne-models.com


    Pattern flying is amongst one of the flying disciplines that requires immense dedication and practice to perform well. After watching experienced pattern pilots perform their routine, I have always been amazed at how graceful, smooth and precise they were able to perform even the most basic of maneuvers that most take for granted. If are like me and enjoy all aspects of our hobby, you have probably already tried your hand at pattern and possibly even priced out a full fledged 2M pattern ship only to find that it can quickly become cost prohibitive. Luckily for us, there are many other options out there that will allow us to enter the majestic world of pattern flying without having to spend a small fortune.

    The Super Taiji 40 EP seems to fit this category nicely. At first look, the Super Taiji seems to be a dedicated pattern plane which is practically sized and designed to provide the pilot with a precise tool in which they can enjoy the realm of pattern flying. With a 52" wingspan, the Super Taiji is large enough to provide a stable and precise airframe while remaining small enough that it can be easy to transport and setup. Available as an ARF, the consumer will have to provide the motor, ESC, servos, receiver and flight pack to get the airframe ready for flight.

    When I first saw the Super Taiji 40 EP, I was drawn to its attractive color scheme, its convenient 50" wingspan and the promise of becoming a better pilot by having a precise and dedicated pattern plane at my disposal. So lets see what is involved in putting this ARF together and take her out to the field to see what it (and myself) are capable of.



    • Attractive color scheme
    • Self tightening wing retainers
    • Convenient size
    • Latching canopy for easy access to flight battery
    • Spinner included



    • None found



    Skill Level:

    Time Required to Build:

    Frustration Level:

    What do these ratings mean?

    The Super Taiji arrives in a sturdy box.



    The individual components of the Super Taiji were wrapped and securely taped down with the wings and tail on top of the box and the fuselage, gear and various other components on the bottom.

    With all of the components of the Super Taiji laid out on my work bench, my first impressions were positive regarding the build quality and the vibrant color scheme.

    The World Models
    Super Taiji EP (40)

    Price: $189.99

    Key Features

    • 40-size electric pattern plane
    • Detachable battery hatch
    • Top quality balsa/plywood construction
    • self-tightening latching system for wings
    • Hand painted fiberglass cowling

    Specs

    Wingspan: 52 in (1320 mm)
    Length: 53.5 in (1350 mm)
    Flying Weight: 3.9 lb (1770 g)
    Wing Area: 490 in2 (31.6 dm2)
    Recommended Motor: KM374811
    Recommended ESC: 40A
    Recommended Battery: 4S3200mAh





    The first thing that will no doubt catch your attention as you look over the components is the unique wing mounting mechanism. There is a spring operated latch that holds a small hatch on the top of each wing. The wing tube has slots on each end where a small wedge shaped plastic piece is to be inserted to hold the wings in place. I was quite intrigued by this mechanism and could not wait to get to the assembly step where these components would be installed. The wings and the horizontal stabilizers are both held on with carbon fiber tubes and wood anti rotation pins. 





    The provided landing gear looks rather sleek with their swept back design. The steerable tail gear is of high quality and should do a good job of providing a slop free linkage to the rudder. A red spinner and a hand painted cowl are also provided with the kit. The canopy has been painted blue from the inside and is held on by a spring loaded latch. This should make battery changes quick and effortless.





    The rudder along with the horizontal stab are air foiled. Several small bags contain the various screws and bolts that will be required in completing the assembly of the Super Taiji. With a quick bolt together of the main components, I was rewarded with my first peek of what the completed Super Taiji would look like and I was quite anxious to start the seemingly short assembly process to have the airframe ready for the weekend.




    Manual


    The Super Taiji manual contains a good amount of information that is illustrated in detail. In some places, verbal descriptions are lacking but the detailed illustrations are clear enough that anyone that has a few ARFs under their belt should have no trouble following along and completing the quick assembly process.

    Download the manual 





    The assembly starts by removing the covering in certain areas of the fuselage where the wing tubes, servo leads and anti-rotation pins will go through. These locations are clearly marked with stickers.

    Certain locations are marked with small holes in the covering that have been applied at the factory with a small pin.

    The Super Taiji utilizes CA hinges which have been installed but not glued. There were pieces of string inside the CA hinges which I removed before I moving on. I assume they were placed when installing them at the factory to make sure the installation was centered.


    Futaba BR 3000
    A great accessory for battery "peace of mind".

    Price: $49.99

    Features

  • Quickly and clearly displays the voltage levels of your battery packs.
  • Total voltage and remaining capacity are shown on a bar graph and as a percentage.
  • Quickly and clearly displays the voltage levels of your battery packs.
  • Can check 2-7 cell LiFe, LiPo and Li-Ion packs, as well as 4-7 cell NiCd and NiMH packs
  • Voltage of each cell of a lithium battery pack can also be displayed
  • Operates on power supplied by the connected battery.
  • Know BEFORE you go just how much battery life you have
  • Specifications

  • Stock Number: FUTM4166
  • Voltage Display Error: +/- 1.5%
  • Dimensions: 3.3 x 2.5 x 0.6 in (85 x 63 x 15 mm)
  • Weight: 1.8 oz (52.6 g)
  • Total Voltage (Ni type): 4.0-17V
  • Total Voltage (Li type): 5-34V
  • Cell Voltage (Li type): 1.1-4.9V
  • Operating Temperature: -10 to +45°C
  • Storage Temperature: -20 to +60°C 
  • BR-3000 Battery Checker Manual





    I applied a couple of drops of thin CA on each hinge to finalize the hinging process. The aileron servos are housed in plastic hatches on each side. The hatches contain pre-drilled tabs which fit the SV3031 servos perfectly. Using the string that was already routed in the hatch, I pulled the servo leads through the wing before moving on to installing the control linkages.





    The control horns for the ailerons are installed by drilling two holes and screwing the horn in place using the provided 18mm screws. The manual is not very clear if you should drill all the way through or not but a quick measurement of the aileron showed that the provided screws were barely long enough to make it though which would make capturing them on the other side difficult. I shortened the screws a tad and decided to drill, harden the wood and install them without going all the way through to the other side. The control link can then be installed using the provided components. I installed the servo side as close as possible to the servo and the horn side as far out as possible to get the best resolution out of the servo.





    The horizontal stabilizers are installed by sliding them by first sliding them on the carbon fiber tube, drilling the tube through the stabilizer and locking them in place with two screws. Since a single elevator servo is used to control both elevator halves, I tried to make sure that the control horns were installed in an identical fashion on both sides.





    The tail wheel is attached using two screws. A small hole is drilled in the bottom of the rudder to provide the steering linkage.The main gear installation is quite quick as well. The main axle is bolted to the gear and the wheels are held in place using two wheel collars on each side. T





    The wheel pants are attached to the metal plates using plastic rivets.that expand when a small screw is inserted. The completed assemblies are then attached to the fuselage using a total of four bolts and the Super Taiji is up on its feet. 





    The recommended motor for the Super Taiji is the KM374811 which is specified to provide 450W of power. I decided to use the recommended motor and motor mount (not included in the ARF) to avoid any compatibility issues with mounting the cowling and the overall balance and performance of the airframe. The plastic motor mount fits perfectly on the fuselage with four bolts. Once I had the motor mounted, I connected an E-Flite 40A ESC to my R617FS receiver and checked the rotation of the motor to validate the ESC connections.





    I mounted the ESC under the battery tray using double sided tape and secured it in place using two small Velcro straps. After tidying up the installation, I mounted the cowl to check the spacing between the spinner backplate and the cowl which turned out to be very little in my case.





    The cowl arrives with four holes already drilled out and all that remains is to position the cowl, drill the fuselage and mount it in place using four screws.     





    The prop and spinner are then attached to the motor shaft using a single nut and two screws. The Super Taiji uses a single elevator servo for the elevator and supplied in the kit is a very nice connector that allows you to combine both the push rods for each elevator to a single connector that is to be attached to the servo horn.





    The rudder and elevator servos are installed in the fuselage and the connections made to the elevator and rudder control horns. A small piece of covering is removed from the bottom of the fuselage to allow for an cooling exit.





    As mentioned before, the wings are held in place using a very unique mounting mechanism. The wing tube is slotted to accept a wedge shaped plastic piece to be inserted which in turn exerts force towards the inside of the wing causing the wing to stay tight against the fuselage. A small spring is used to secure the wedge piece held against a pre-installed screw in the wing. After bolting the wings on, I mounted the R617FS receiver in place and taped the antennas to the side of the fuselage and this short assembly process was essentially completed.




    For the maiden flight of the Taiji, we headed out to the field on a calm but overcast day. After installing the recommended 4S3200mAh battery, I noticed that the airframe balanced a little on the nose heavy side but seemed close enough that I did not add any weight at that time to correct for it. The manual recommends a single control rate so I set that to my second rates, set the high rates to as much as I could get and the low rates to half of that and the Super Taiji was ready to roll.

    After getting the field to ourselves, I lined the Super Taiji up against the wind and applied throttle until I watched the tail lift and the the airframe take to air and climb with authority. It only required a few clicks of trim to get the Super Taiji flying hands off level. I immediately dropped to my second rates control throws to start experimenting with the flight characteristic of the Super Taiji.

    The first thing I usually do with an airframe is to check the flight tracking when inverted. Since the airframe had balanced a little on the nose heavy side, a nose drop was expected and that is what I found as I had to apply a good amount of down elevator to maintain level flight. Usually, just checking the nose drop on the level is not good enough so I put the Super Taiji into a 45 degree climb and rolled inverted to find the nose still dropped drastically.  At this point I landed and shifted the battery as far back as it would go and tried again only to find that it was still tail heavy. To get the proper CG, I added around 28g of weight using stick on weights to the tail section and the Taiji really came to life.

    The roll rate with the recommended control throws was around one rotation per second which was very controllable. I noticed that the Super Taiji really carries speed and likes to be flown fast. With the throttle fully closed, I pulled a big loop to find that the Super Taiji pulled through with minimal impact to speed at the top. The climb rate that the power system provided was sufficient to climb straight up for a few hundred feet in preparation for your stall turn. 

    What really surprised me was how fast the Super Taiji could fly. On several occasions, I had the chance to mix it up with two nitro Mustangs running hot laps and the Taiji could keep up, if not beat both on straight and level passes. When it came to stall turns, I did initially observe some pendulum effects after the turn but but after shifting the CG rearwards, the effects diminished. I was pleased to find that the Super Taiji can rotate within its wingspan when stalled out during hammerheads and stall turns. 

    When it came to knife edge flight, I was very pleased to find that the Super Taiji exhibited very little coupling on the rudder. So much so that after a few passes, I was comfortable enough to bring the Super Taiji fast and low over the runway and perform knife edge passes and point rolls a few feet of the deck. The Super Taiji perform point rolls very nicely with minimal input required to correct for each orientation. 

    After about 7 minutes of flying, I lined the Super Taiji and started my landing approach. The Super Taiji exhibited a nice glide ratio and floated well on approach where at first I misjudged how much speed it was carrying and had a few bouncy touch downs. After getting used to bleeding off the speed that the Super Taiji carried on approach, I was able to perform nice three point landings every time.

    Check out the video to see her in action!




    Super Taiji 40 EP (Pilots, Stills & Video: Burc Simsek and David Smith)
























    The Super Taiji really impressed me in terms of build quality and flight performance. While my initial flights were performed under slightly nose heavy conditions, I was later able to shift the battery back and add some tail weight and get the Taiji balanced out close to where I think it flew quite neutral. After only a few flights, I was able to get a good feeling of how the Super Taiji likes to be flown and how nicely and precisely it tracks through the various maneuvers I put it through. I will be experimenting further with the CG as I practice my sportsman and intermediate sequences. The recommended flight battery provides a comfortable 8-10 minutes of flight time depending on throttle usage and should be more than enough to fly most sequences twice before having to land. Battery changes with the latching canopy were quick and effortless which made getting back in the air all that faster.

    Overall, I was very pleased with the Super Taiji and cant wait for my next opportunity to take it out to the field. I think this will be my main practice plane for a good while as it is very convenient to transport and a pleasure to fly.





    World Models Distributor
    4749 - K Bennett Driver
    Livermore CA 94551
    www.airborne-models.com


    Futaba Corporation of America
    Distributed by:
    Great Planes Model Distributors
    P.O. Box 9021
    Champaign, IL 61826-9021
    Phone: (217) 398-8970
    Website: www.futaba-rc.com 


    ZAP and Pacer Adhesives
    Distributed by Frank Tiano Ent.

    3607 Ventura Drive E.
    Lakeland, Florida 33811
    Phone 863-607-6611

    www.franktiano.com

    Welcome to Hobby People Stores!
    Newton Supply Company
    13953 SW 140 Street
    Miami, Florida 33186
    Phone: (800) 888-2467

    www.epogrip.com/hobby


    17260 Westheimer Parkway
    Houston, TX 77082

    http://www.bcflyers.com/


    Comments on RCU Review: The World Models Super Taiji EP (40)

    Posted by: hsukaria on 07/26/2012
    Nice review. I wonder if this plane can be effectively converted to glow?
    Posted by: hsukaria on 07/26/2012
    oops, double post, sorry.
    Posted by: S C racer on 07/29/2012

    Posted by: S C racer on 07/29/2012
    im a little confused You said the plane was nose heavy on the first flight and you shifted the battery back and said that it was still tail heavy yet you added weight to the tail???????? I think you ment it was still nose heavy. good review other than that.
    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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