|Contributed by: Greg Covey | Published: July 2005 | Views: 28802 | Email this Article
VMAR Distributed Exclusively in North & South America
Richmond RC Supply Ltd
- Integrated decals
- Custom parts
- Removable wing halves
- Wide range of flight speed
- Manual errors
- Electric conversion was difficult to balance CG
- Wingloading a bit high
Light Weight Wood Built Up Construction!
T6 Main Landing Gear for light weight strength!
Fibreglass Cowl! Precut for VMAX 46PRO & 52PRO and
most popular 46 size engines!
Ailerons, Rudder and Elevator!
Control Surfaces... Factory Installed and Pinned!
Color Illustrated Assembly Manual!
the video of the VMAR EASY 3D AR
VMAR EASY 3D ARF is a lightweight 3D capable design with a symmetrical
50" span wing and an all up dry weight of 4.25 to 4.75
lbs. The design uses hand-chosen light weight balsa directly
from block stock and a new transparent POLYCOTE ECS covering.
POLYCOTE ECS covering utilizes Ultratough Polyester, enhanced
graphics and detailing inside the covering and very minimal
Sure Seal Seams to produce a totally fuel proof, high strength,
lightweight, ultra durable covering.
main gear set offers premium strength and light weight! All
this adds up to premium 3D performance on a very rugged design!
I'll be converting the new Vmar Easy 3D from glow power to
clean and quiet electric power.
Span: 50.4 in (1280 mm)
Area: 690 sq in
Length: 45 in. (1143 mm)
Flying Weight (Dry): 4.25-4.75 lbs (1932-2159g)
Engine: .40-.52 cu in. VMX-46PRO Recommended. For High
Performance use VMX-52PRO
Radio: 4-5ch with 5 servos. Computer Radio to utilize
Main Gear: 7075 T6 Aluminum
ARF model comes well packaged and all the parts are individually
wrapped. There was no damage or covering touch-ups needed
on my model. The ECS graphics were integrated into the covering
The wing uses 2 aluminum bars for strength and perfect incidence.
The manual uses color photos on a glossy page...very nice!
The text instructions use step-by-step procedures to ensure
a correct assembly. The whole kit is highly integrated and
has very few parts.
wing halves and tail sections were perfectly covered and
all control surfaces were pre-hinged. I test pulled on each
control surface and nothing budged. I was off to a great
start! Here are some different views of the fuselage. The
build is not what we would consider light for electric but
it is high quality and a very solid design. This will make
for a nice model that you don't have to be delicate with
in the car or at the flying field.
conversion to electric power will use an AXI 4120/14 motor
and a Radial Mount Set from Hobby Lobby. To mount the motor,
I needed a 1" thick balsa piece and a 1/4" thick
plywood piece to obtain the correct distance from the firewall
to the spinner backplate. I used #8-32 2" long screws
and t-nuts to secure the motor to the firewall.
motor mounted easily with plenty of space left over in the
firewall opening for the motor wires to run inside to the
fiberglass cowl fit perfectly over the motor and allowed
the prop adapter to extend without any cutting.
used an HLHS225 2-1/4" Spinner from Hobby Lobby that
fit well over my APC 14x7 e-prop and found that it was easy
to install. The outlined
area in the cowl was cut away to provide cooling air flow
past the motor and into the fuselage area.
linkage hardware all comes with the kit and the control
horn holes are pre-drilled which makes installing the linkage
a quick job.
used Loctite on the threaded areas. I typically use Loctite
on any threaded surface except for prop adapters. I was
going to replace the slider easy links with snap keepers
but when I went to tighten the hex head "grub"
screws, I felt it sink into the control rod. This should
prevent the rod from slipping along with the applied Loctite.
tail pieces needed some of the covering removed before gluing.
Both stabilizers fit perfectly without any problems with
The control horns holes are pre-drilled for easy linkage
installation. The manual contained some errors as it suggested
that there were two elevator halves and separate linkages
for each half. Perhaps the design was recently upgraded
I installed the landing gear on my Vmar Easy 3D, I wanted
more than just the stock wheels. To improve the look, I
added some Hangar 9 Funtana .90 (HAN2683) wheel pants and
mounted them using the stock supplied hardware with a set
of Sullivan (888) 5/32" Wheet Pant Brackets.
gear mains simply screwed into the pre-drilled holes on
the fuselage bottom. The tailwheel assembly was pressed
into the pre-mounted brass tubing on the rudder and screwed
into the pre-drilled holes on the bottom of the tail.
connected the rudder and elevator linkage using the stock
hardware in the kit. The instructions were a bit confused
about how many servos were used for the elevator. My suspicion
is that an earlier or larger version of the kit used one
servo per elevator half. The Easy 3D uses a single piece
elevator so only one servo is needed. Additionally, the
servo bays in the tail are labeled on the covering for rudder
I used some of the new FMA DS300BB Digital Servos. Although
this project does not really make the servo features shine
like when calibrating multiple servos per control surface
or using an unregulated supply voltage, their control precision
has spoiled me.
used red Loctite on all the threaded parts of the linkage.
I also drilled a hole in the plastic tail wheel mount as
a final feed for my antenna run.
also added a Tower Hobbies System 3000 On/Off Switch assembly
in between the UBEC output and the receiver
motor direction of rotation was tested with the prop removed
before re-mounting the cowl, prop, and spinner. If the rotation
is reversed (clockwise) you can simply swap any two of the
three wires from the ESC to the motor. The Jeti Advance
ESCs are supplied with mating connectors for the motor wires.
the Jeti ESC was an Advance version but not an Advance PLUS
version, I could only change the brake setting to OFF and
the timing to HARD. Hard timing is used for outrunners like
an AXI motor.
new 4-cell Kokam 3.2AH (20C) pack weighs 12.8oz. It is shown
with an 8-cell, 3.0AH NiMH pack for size comparison. Note
that the new cell width is the same as a sub-C cell length.
The 4-cell Lithium pack has a voltage equal to about 14
cells of 3300mAh NiMH which weighs about 26oz or twice the
weight of the Kokam pack. This is a pre-production test
pack without the taps to monitor each cell. The production
packs with taps produced by FMA Direct will be called "Skyvolts".
slightly modified the hatch by removing the balsa tongue
and gluing a small piece of Velcro which sticks to the battery.
The other side uses the stock screws for now.
4-cell Kokam 3.2AH pack mounted fairly easily using some
Velcro and a EPP foam wedge. The battery was supported up
front using the stock plywood runners and motor mount screws.
In the rear, it was attached to a Velcro strip that I glued
onto the landing gear plywood plate and then further supported
by a foam wedge in between the wing bar and Lithium pack.
It was easy to insert and supported from movement in any
my Easy 3D now ready to fly?
Vmar Easy 3D was looking good! Unfortunately, when I checked
the balance, the plane was tail heavy even with the Lithium
pack all the way forward against the firewall. I decided
to replace the the two FMA DS300BB Digital Servos in the
tail with HS-85 Metal Gear servos that weigh about half
the weight. It will reduce 1.5oz in the tail section.
dropped 1.5oz in my tail by switching to the HS-85MG servo.
It has the strength of a standard servo but only half the
weight. My Easy 3D was RTF at 74oz (4.6lbs) using the 13oz,
4-cell, Kokam 3.2AH (20C) pack. The CG was still a slight
bit aft but reasonable to test fly.
Easy 3D takes off with plenty of power on it's maiden voyage
the maiden flight, the Easy 3D took off with plenty of power!
After a little trimming, we noticed that the plane was quite
pitch sensitive. Even though we could slow it down to a
crawl in the sky or speed it up very fast, the controls
were too twitchy for most aerobatic maneuvers. We decided
that it was still too tail heavy and brought it in for a
nice landing unharmed. It was time to move the tail servos
moved the servos in the tail to an area just forward of
the ailerons. The short metal rod linkage was replaced with
longer runs of #574 Sullivan-brand Gold-N-Rod nyrod to keep
the weight down. The CG was now just forward of the recommended
135mm aft of the wing leading edge. I felt that we were
ready to test fly it again.
new CG setting made the Easy 3D too nose heavy to hold a
our second set of flights, we tested the Easy 3D with two
pilots and also video taped one of the flights. Although
the Easy 3D loved to roll and loop, it was now too nose
heavy to hold a hover even though we had plenty of power.
The plane could be slowed down to a crawl and remain stabile
or shoot straight up into a long vertical climb.
The VMAR EASY 3D ARF comes well packaged and the POLYCOTE
ECS graphics are integrated into the covering for a great
look. My electric conversion weighed right in the acceptable
range specified by the manufacturer. The AXI 4120 motor
and 4-cell Kokam 3.2AH power system provided unlimited vertical
climb capability and was easy to install. Although we could
not achieve great 3D performance, the aerobatic capability
of the Easy 3D is very good and the thick "D"
shaped airfoil provide a wide range of flight speed from
fast passes to a slow crawl for landing.
from the stunning looks, especially with the added wheel
pants, the Easy 3D is built rock-solid so it can survive
flying on a windy day and being banged around in your trunk.
The 50" span wing is a convenient size to keep assembled
for easy readiness for your next flying fix.
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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