RCU Review: Great Planes Giant U-Can-Do-3D ARF


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    Contributed by: Erick Royer | Published: March 2006 | Views: 43837 | email icon Email this Article | PDFpdf icon

    Review by: Erick Royer




    Great Planes
    Model Distributors

    P.O. Box 9021
    Champaign, IL 61826-9021
    Phone: 217-398-3630
    Fax: 217-398-0008
    www.greatplanes.com
    productsupport@greatplanes.com



    Window Media Player
    GREAT PLANES
    Giant U-CAN-DO VIDEO


    Packaging:
    Construction:
    Hardware:
    Manual:
    Ease of Assembly:
    Completeness of Kit:
    Covering Quality:
    Takeoff:
    Landing:
    Basic Flight:
    Advanced Flight:
    Stall Characteristics:


    • Fast easy assembly
    • Excellent instruction manual
    • Plug in wings
    • Extensive quality hardware package
    • Fiberglass Cowl & wheel pants
    • Capable 3D aerobatic performer
    • Removable tail section


    • None



    • Fully covered wing, fuselage, tail
    • Plug-in wing halves
    • Removable tail
    • Fuel tank, tubing, clunk
    • Aluminum Spinner included
    • Motor mount & bolts
    • Pushrods
    • Pre painted fiberglass cowl
    • Pre painted wheel pants
    • Canopy
    • Decals
    • Steerable tail wheel
    • Wing bolts, control horns, clevises.
    • Aluminum Spinner
    • Other assorted hardware


    Just when you thought they were done... Great Planes introduces, in my opinion, the best (and the biggest) U Can Do 3D yet. Having had so much fun with my last U Can Do models, I am very anxious to get this assembled and in the air.

    This giant version of the U-Can-Do is designed around the popular OS 1.60 2-stroke engine or 1.20 to 1.80 c.i. 4-stroke engines and you can even put a 32cc to 44cc gas engine on it. It also requires a minimum 8 standard servos and a 6-channel radio. Unlike the other U-Can-Do's, the Giant U-Can-Do has the addition of flaps, so an additional channel on your radio is needed to activate them. It is best to have a proportional channel so you can vary them any way you like. A good computer radio will allow you the ability for some advanced mixing as well. Of course you can just tie them in to the ailerons with Y connectors if you choose and have one very large aileron.

    Construction is of built up balsa and ply and it is covered in 4 colors of MonoKote. The cowl & wheel pants are painted fiberglass and the landing gear is made of aluminum. Great Planes hardware is provided and includes a fiberglass reinforced plastic motor mount, pushrods, engine bolts, wheels, fuel tank, control horns, pushrods, clevises and an aluminum spinner that is pre slotted to the fit the APC 18x6w wide blade prop that is perfect for this model with the OS 1.60 engine.

    The Giant U-Can-Do has some new features that I was happy to see, especially due to the large size of this model such as plug in wings and a removable stab making it just as easy to transport as its smaller cousins. The wings are supported with an aluminum wing tube and held in place with two nylon wing bolts that you can remove and attach without tools. The stab is held in place with allen head 2 screws. These features make transporting this model much easier if you do not have a large vehicle.

    The assembly of ARF's that are on the market today seem to get easier and easier. While the Giant U-Can-Do is not a ready to fly model, Great Planes once again went beyond the call and made this model very simple to assemble. It probably took me less than 7 hours from box to field. Had I not had to pause for assembly photos, I guess I could have saved about 2 hours.

    Because the assembly was very straightforward and the manual is very easy to follow and detailed, I am not going to rewrite the manual with this review. I will give an overview of each step in the assembly and note any problems or concerns I had as well as things that I found to be above average.

    Lets get assembling!!!

    Price: $349.99
    Wingspan:
    82 in. (2085mm)
    Wing area: 1772 sq. in. (114 dm2)
    Length: 84 in. (2135mm)
    Flying Weight as tested: Total: 13 lbs. 1 oz. (dry)
    Wing loading: 16.8 oz./sq. ft.
    Airfoil: symmetrical
    Skill level:
    Intermediate-Advanced

    Radio Used:
    Futaba 9C Transmitter
    Futaba R148DP PCM Rx
    (4) Futaba 9001 Servos for ailerons and flaps

    (1) Futaba 3001 Servo for throttle
    (3) Futaba 9306 Servos for elevator and rudder

    Channels Used:
    7 total - elevator, aileron, flaps, rudder, throttle
    Battery Used:
    Hydramax 1600 Mah 6 volt
    Motor Used: OS 1.60 2 Stroke (Tested initially with and OS 1.20 pumped 4 Stroke but the performance was lacking - see notes in the flight report)
    Prop Used: APC - 18x6W
    Spinner Used: Included with the kit.
    Required to Complete:

    • 4+ channel radio with 8 servos

    Suggested Servos:
    Ailerons: Two 50+oz/in ball bearing
    Flaps: Two 50+oz/in ball bearing
    Rudder: One 90 oz/in high torque
    Elevator: Two 90 oz/in ball bearing
    Throttle: One, standard torque

    • 2-Stroke or 4-Stroke 1.20-1.60 cu in (20-26cc) Glow or Gasoline engine
    • >Servo Wire Extensions
    • CA glue, epoxy, Loctite thread lock
    • Glow plug

    • 1/2" foam rubber padding

    • Medium fuel tubing

    • Fuel filter

    • Propeller (IMPORTANT-do not use a propeller with a pitch higher than 8)

    • Building and field equipment


    The parts complete as they come out of the box!


    The above image to the left you can see all the pieces included and the accessories exactly as they come out of the box. The fuselage, wing, tail feathers & control surfaces are all built and covered. The fiberglass cowl and wheel pants are painted to match the MonoKote. I inspected the covering and found no areas that needed to be fixed or ironed out. This seems to be the case with most GP models that I have assembled. The instruction manual is extremely well done. Step by step pictures show each phase of assembly and the written instructions are very clear. I think Great Planes makes some of the best assembly manuals in the business. They are very detailed with excellent photos to walk you through each step. Click here to read the manual.


    WING ASSEMBLY


    The first step in the assembly process is to cut the pushrods to length as indicated in the chart and using denatured alcohol and a file to prep the ends for soldering the clevises on the non-threaded end of the pushrods. I soldered each in place using silver solder and flux. You will later find out that if you set these up exactly as indicated in the manual setting up the control throws and servos later in the assembly process.

    Next, I removed the covering from the servo openings. I like to use a soldering pen for this as it gives me a clean edge and adheres the glue to the edges at the same time.

    Using epoxy glue I affixed the 2 plastic wing dowels on the root rib of each wing half. You want to be sure that they go in straight so they align with the fuselage properly.

    The CA hinges come in a whole sheet and you need to cut them out to 3/4" x 1" pieces as per the manual. I like to also cut small bevels on each corner so they slide into the slots better on the wing and control surface. I used my hobby blade and ran it through all the hinge slots in the leading and trailing edges of the wing components. I aligned the ailerons and flaps and affixed them in place using thin CA on the hinges.

    Next, I measured out the locations of the control horns as per the manual and attached them with the supplied hardware. The wing has string inside it for threading the servo wires. I used 36" servo extensions for the aileron servos and 12" extensions for the flap servos and pulled the wires through with the string. Then I attached the 4 Futaba 9001 servos in position. For servo horns I used Dubro heavy-duty long arms to be sure I had enough movement for 3D control throws.

    With the servos installed, I connected all 4 control rods and temporarily connected the servos to the receiver so I could adjust the centering and end points on my radio.



    FUSELAGE ASSEMBLY

    To begin the fuselage assembly I removed the covering from the holes where the wings connect as well as the servo openings in the tail again using my soldering pen. Then I removed the 2 allen head bolts that secure the stab fillet to the tail of the fuselage and ran my blade through the false stab and the wing fillet and removed it from the plane.
    Next, I mounted the wings to the plane using the wing tube and thumb bolts. This is necessary so you can check the alignment of the wing with the horizontal stab to ensure they are parallel. With the wing on, I attached the elevators to the stab using the same method as with the ailerons and flaps. I then mounted the stab and reattached the fillet that I removed earlier and fastened it down with the hex head bolts that I previously removed.
    Viewing from the rear of the aircraft, I checked to ensure that the stab and wing are parallel which they were.
    Next, I slid the vertical fin into the slot in the tail of the fuselage and using a felt tip marker, I traced the fin along the covering. I then removed the fin and using a hobby knife I removed the covering on both the fin and fuselage inside the lines I made. I then attached the fin to the plane with 5 minute epoxy. Once the glue dried, I attached the rudder in the same manner as I attached the ailerons and flaps.
    I installed the control horns on the elevator halves and the rudder in the same manner as with the ailerons and flaps.
    I installed the three Futaba 9206 servos in the tail (2 for the elevators and 1 for the rudder). I used 36" servo extensions to bring the wires up to the RX in the cockpit. Again as with the ailerons I used Dubro Heavy Duty Long Servo Horns for all three servos. I attached the pushrods and connected the servos up to the receiver once again to check the centering and end points.

    TAIL WHEEL & WHEEL PANTS

    I flipped the fuselage over next and installed the tail wheel assembly. This is a very nice setup and it works well. The main thing I want to offer caution on is to take time when filing the flats in the tail wheel wire as you want to make sure that the control arm is 90 degrees to the tail wheel.
    I mounted the main landing gear next with the supplied hardware. The gear comes in two halves. I installed the axles and test fit the wheel pants to setup the alignment of each wheel. I love the way Great Planes does their wheel pants with the holes and slot for the axle already installed. This saves so much time and ensures a perfect fit every time. Once everything checked out, I finalized the installation of the wheels and wheel pants.


    MOUNTING THE ENGINE

    The original engine that was supplied for this model was the OS Surpass 120 III, but after installing it on the plane and test flying it, I realized that it would not produce enough power for enhanced 3D maneuvers, so I opted for an OS 160FX 2 Stroke engine in its place.

    I mounted the Great Planes Engine mount to the firewall by drawing a vertical center line and following the instructions in the manual.

    Then I positioned the OS 160FX on the mount and installed the spinner back plate so I could be sure that the back plate measures exactly 6" away from the firewall. Then using a Great Planes Dead Center Tool, I marked the position for each of the four mounting bolts and removed the engine and drilled the pilot holes. I then tapped 8/32 threads into the holes and secured the engine with the supplied hardware.

    I then installed the pushrod for the throttle which slid down the already attached tube that went through the firewall. and used a plastic clevis to attach to the throttle arm.

    OS 160 FX Closer Look
    OS160 FX

    2-Stroke power for the Giant U-CAN-DO-3D

     The OS 160FX features a one-piece crankcase
    and a twin ball bearing-supported crankshaft.
    The cylinder  is ABN construction (Aluminum 
    Piston, Brass/Nickel Cylinder) with ring. Added 
    cooling is provided by the tall squared heat sink.
    The OS 160FX is engineered for low fuel 
    consumption and tight installations.  The side 
    exhaust with muffler has a rotatable exhaust 
    outlet. The wide wing-shaped exhaust port 
    contributes to higher torque at lower rpm.
    The engine has an extra long crankshaft & 
    jam nut w/prop washer to secure the propeller.
    The carburetor is a #60F with a remote needle 
    mounted on the backplate of the engine to keep 
    fingers away from the spinning propeller.  The 
    remote needle valve can be mounted three ways: 
    vertical, horizontal, and separate from the engine.
              Displacement: 26.23cc (1.60 cu in)
              RPM range: 	1,800 - 10,000
              Bore:             33.6mm (1.32")
              Stroke:         	29.6mm (1.17")
              Weight:    	Engine- 930g (32.8oz)   
    		Muffler- 275g (9.7oz)
              HP:        	3.7 BHP at 9,000 RPM
              Length: 	115.5mm (distance from 
               the back plate screw to drive washer)
                      	30mm (distance between 
               centers of the mounting holes)
              Width:  	51.5mm (width of engine 
              neglecting engine mounting flanges)
                      	62mm (distance between 
              centers of the mounting holes)
              Exhaust mounting screws width 
              (center to center): 42mm (1.65")
              Height:         	123.2mm
              Crankshaft Thread Size: 3/8-24
              Crankshaft Length (drive washer front 
              to crankshaft front): 42mm
              Crankshaft Threaded Area: 28mm
              Suggested Props: Aerobatic: 15x12-14,
             16x10-14, 16.5x10-13   Sport:      
             17x10-13, 18x10-12

    With the engine mounted, I placed the cowl into position and marked off the openings for the exhaust, needle valve and removed some material for engine cooling on the bottom. Once everything fit, I attached it to the fuselage with 4 screws.

    I was going to install a remote glow igniter, but with the material I removed from the bottom of the cowl, it was easy to reach with a handheld igniter.

    I installed an APC 18x6W 3D propeller and the included aluminum spinner.

    The fuel tank installed just behind the firewall and I used a two line setup with a feed that passed through a Slimline Excel Fueler and then to the carb and a vent line that went to the muffler.

    RADIO INSTALLATION


    I chose the Futaba 9CAP system for the Giant U-CAN-DO-3D specifically. For receiver I used a R149DP PCM 9 channel receiver. The receiver mounted on the radio tray towards the back of the cockpit. Just forward the receiver is where I installed the throttle servo and connected it with the supplied EZ connector to the throttle pushrod. The 6 Volt battery for the radio system mounted near the rear of the cockpit to provide optimum balance. I used a Heavy Duty switch from Smart Fly.

    I connected each of the control surfaces to separate channels and used the radio to adjust the mixing of each. By using 2 channels for the elevator it allowed me to adjust each half independently and I did not need the use of a reversing Y Connector. By using separate channels for the flaps and ailerons, it allowed me to program features such as CROW (flaps down and ailerons up) as well as using the flaps like flaps on a slider on the left of the transmitter. But I was also able to flip a switch and tie the flaps to the ailerons to give me even greater roll authority.

    The last thing I needed to do with the radio was to slide the antenna wire down the tube installed in the fuselage and use a piece of fuel tubing to secure it in place.

    .

    FINAL TOUCHES

    To install the canopy I glued the dowel into the hatch area and secured the canopy in place with the included screws.

    To check the CG of the aircraft, I made a mark 6 1/4" back from the leading edge of the wing and with the assistance of a helper we lifted the plane at those locations and it balanced slightly nose heavy which was good for the first flights. But is this model performs like my other U Can Do's, I am certain that the CG will be moved back for even greater 3D response.

    The last thing I did before heading to the field was to set the control throws for each channel as specified in the manual:

    These are the recommended control surface throws:
    High Rate (3D) Low Rate
    ELEVATOR:

    5" [130mm] up
    5" [130mm] down

    1-3/4" [45mm] up
    1-3/4" [45mm] down
    RUDDER:

    6" [150mm] right
    6" [150mm] left

    4" [100mm] right
    4" [100mm] left
    AILERONS:

    2-3/4" [70mm] up
    2-3/4" [70mm] down

    1-1/4" [32mm] up
    1-1/4" [32mm] down
    FLAPS: 4" [100mm] full 2-3/4" [70mm] half


    Just like the two smaller cousins, I was equally as excited about getting this Giant U Can DO in the air. I ran a couple tanks of fuel through the OS 160FX at the field for break-in. I made some minor adjustments to the high and low needle valves on the engine until it was running like a top.

    MAIDEN FLIGHT

    The maiden flight took place on a 35 degree day with very little wind. It was cold, but the no wind made it very bearable.

    I checked out the control throws and directions one last time and proceeded to make a quick taxi run to ensure everything was ok. Once satisfied, I advanced the throttle and just like the smaller U Can DO's the plane was airborne in seconds. I needed a few clicks of aileron and elevator trim to get the plane to fly hands-off.

    Slow flight characteristics were amazing - allowing the plane to almost come to a crawl in flight. It remained very stable through out all speeds and the control response remained very effective.

    The tracking on the Giant U CAN DO was excellent and it flew anywhere you pointed it. I think the larger size and increased power over it's smaller cousins made it perform even better as wind and breezes had very little effect on flight performance.

    Landing was also uneventful. I tried a couple landings, with the use of flaps and without. Flaps on this plane, in my opinion, serve no real purpose other than to use for making maneuvers more fun. As a private pilot, flaps in a conventional sense are used to slow a plane down in landings by increasing drag over the wing and allowing for more lift. Because of the excellent slow flight characteristics of this plane there really is no reason to use flaps on landing. The impact brings the plane in at a crawl without and a snails pace with.

    PUSHING THE ENVELOPE!

    After the first few flights on the maiden day I had the chance to fly the plane several more times to get used to it before shooting the video. Weather conditions were much calmer on the other test days and the lack of wind makes the Giant U Can Do shine big time. I only wished that there were less clouds so the video could have been brighter. But none the less, the flying was fun.

    I held the nose up until is stalled and brought the plane into a spin. Applying opposite rudder I was able to get it into an upright flat spin. Not perfectly flat, but almost.
    There is no real tendency for the plane to snap out of a stall. It just kind of mushes along until one wing drops slightly.

    I then did some rolls on high rate, they were extremely fast and then tied the flaps into the ailerons using a mix on my radio and the roll rate doubled. Slow speed flight is just awesome. I activated the flaps and put them down and pointed her in the wind at 1/8th throttle or a little under and the plane basically stood motionless in the air for as long as I wanted it to at just a slight nose up attitude. When the plane finally converted into an elevator, the wing rock was minimal and by using the rudder I was able to steer the plane all the way down to the ground.


    Inverted flight required only a touch of down elevator. I tried to stall the model but found it practically impossible to do so. I held the nose up and chopped the throttle, but the plane just keeps flying. If you can get it to stall the recovery is so fast it's hard to tell you stalled it.


    The plane will do super tight inside and outside loops and sharp 4-point rolls. You can snap it and then come out of it and go right into a hover.

    The last maneuver I tried was a blender which did not look so good the first time as the rates were on high and I think was just too much to make this maneuver work properly. So I tried it a couple more times on low rates and there was a vast improvement with the blender converting to an inverted flat spin with a very slow decent rate.

    This plane is a lot of fun, even more so for me than the smaller cousins I have, as it is easier to see and the OS 160FX is a monster giving you enough thrust to do what ever maneuvers you like. I would not hesitate to recommend this plane to anyone looking to get into 3D flight with a larger-scale model.

    GREAT PLANES GIANT U-CAN-DO-3D VIDEOS
    Windows Media Player Format

    In summary, I've had the privilege of having flown both the .60-size and .46-size UCD's. Now with the Giant UCD, I can say that all were capable of doing extensive 3D aerobatics. I am partial to larger planes as it always seems to be windy when I finally make it out to the field. The larger planes are more solid and less effected by wind. They are all very forgiving aircraft and let you get away with things that would end the lives of most other models.

    The UCD's are relaxing to fly and very forgiving. Plus you can be as wild or as tame as you like. The Giant UCD is no exception leaving almost limitless as to the maneuvers you can perform as your skills improve.

    The U-CAN-DO 60 and its smaller cousin, the U-CAN-DO .46 have been among the most talked about planes in our forums during their day with the Giant UCD following suit with tons of threads from countless owners that can give you advice on different engines, servos, and settings. You will also find a lot of guys who have successfully installed gas engines up to 40cc on the nose of this plane with much success. If you have questions about this plane or this review simply visit our forums on RC Universe and an enormous amount of information on them is available!


    P.O. Box 9021
    Champaign, IL 61826-9021 USA
    Phone: 217-398-3630
    Fax: 217-398-0008
    Website: www.greatplanes.com
    email: productsupport@greatplanes.com

    Futaba Corporation of America

    Distributed Exclusively in the U.S.A., Canada and Mexico by:
    Great Planes Model Distributors
    P.O. Box 9021; Champaign, IL 61826-9021
    Website: www.futaba-rc.com

    OS Engines
    Distributed Exclusively in the U.S.A., Canada and Mexico by:
    Great Planes Model Distributors
    P.O. Box 9021; Champaign, IL 61826-9021
    Website: www.osengines.com

    Dubro, Inc.
    480 Bonner Road, Wauconda, IL 60084
    Phone: 800-848-9411
    Website: www.dubro.com

    Slimline,
    www.slimlineproducts.com
    (480) 967-5053.

    Quest Engineering & Development
    1328 East Cottonwood Lane
    Phoe
    nix, AZ 85048
    (480) 460-2652
    E-mail:
    Info@Smart-Fly.com

    Comments on RCU Review: Great Planes Giant U-Can-Do-3D ARF

    There are no comments

    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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