Contributed by: Erick Royer | Published: March 2006 | Views: 43837 | Email this Article
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Review by: Erick
Royer |
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 Window Media Player GREAT
PLANES Giant U-CAN-DO VIDEO
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- Fast easy
assembly
- Excellent instruction manual
-
Plug in
wings
- Extensive quality hardware
package
- Fiberglass Cowl & wheel
pants
- Capable 3D aerobatic
performer
-
Removable
tail section
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- 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
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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!!!
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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:
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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
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The parts complete as they come out of
the box!
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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.
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.
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.
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.
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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.
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OS 160 FX Closer Look |
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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
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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.
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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.
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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:
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These are the recommended control surface
throws: |
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High Rate (3D) |
Low Rate |
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ELEVATOR: |
5" [130mm] up
5" [130mm] down |
1-3/4"
[45mm] up
1-3/4" [45mm] down |
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RUDDER: |
6" [150mm] right
6" [150mm] left |
4"
[100mm] right
4" [100mm] left |
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AILERONS: |
2-3/4" [70mm] up
2-3/4" [70mm] down |
1-1/4"
[32mm] up
1-1/4" [32mm] down |
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FLAPS: |
4" [100mm] full 2-3/4"
[70mm] half |
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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!
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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
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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!
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 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
Phoenix, AZ
85048
(480) 460-2652
E-mail:
Info@Smart-Fly.com | | |
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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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