Glow to Electric Conversions Discuss glow/gas conversion to electric here.

Vmar Easy 3D Conversion

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Old 01-01-2005, 02:38 PM
  #1  
Greg Covey
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Default Vmar Easy 3D Conversion

Hi,

I'm converting the new Vmar [link=http://www.richmondrc.com/vma/storecusavma/productpages/productpage%20cusa%20vma%20e240x.htm]Easy 3D[/link] from glow power to clean and quiet electric power.

The 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. The 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.

The main gear set offers premium strength and light weight! All this adds up to premium 3D performance on a very rugged design!
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Old 01-01-2005, 02:43 PM
  #2  
Greg Covey
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Default RE: Vmar Easy 3D Conversion

Easy 3D Features:

* All Light Weight Wood Built Up Construction!
* Canopy pre-installed!
* 7075 T6 Main Landing Gear for light weight strength!
* Plug-In Wings!
* Scale Fibreglass Cowl! Precut for VMAX 46PRO & 52PRO and most popular 46 size engines!
* Huge Ailerons, Rudder and Elevator!
* Pre-hinged Control Surfaces... Factory Installed and Pinned!
* Full Color Illustrated Assembly Manual!
* Hovering and Harrier Flying Tips from FlyRC Magazine!

Specifications:

*Span: 50.4 in (1280 mm)
*Area: 690 sq in
*Airfoil: Symmetrical
*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 Flaperons.
*Main Gear: 7075 T6 Aluminum
*Cowl: Fibreglass

Kit Includes:

* Heavy Duty clamp type T-Beam engine mounts!
* Accomodates standard servocs from Airtronics, Futaba, JR & Hi-Tech!
* Pre-installed pinned Control Surfaces!
* Hardware, spinner, wheels and tank!
* Assembly Manual
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Old 01-01-2005, 02:49 PM
  #3  
Greg Covey
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Default RE: Vmar Easy 3D Conversion

The 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 (not decals).

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.
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Old 01-01-2005, 02:53 PM
  #4  
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Default RE: Vmar Easy 3D Conversion

The 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!
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Old 01-03-2005, 11:59 AM
  #5  
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Default RE: Vmar Easy 3D Conversion

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 "baby" in the car or at the fly field.
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Old 01-03-2005, 12:02 PM
  #6  
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Default RE: Vmar Easy 3D Conversion

The inside of the fuselage bottom hatch shows the detail used in this construction.
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Old 01-03-2005, 12:04 PM
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Greg Covey
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Default RE: Vmar Easy 3D Conversion

My conversion to electric power will use an [link=http://www.hobby-lobby.com/brushless-axi4120.htm]AXI 4120/14[/link] 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.
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Old 01-03-2005, 10:58 PM
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Default RE: Vmar Easy 3D Conversion

Greg

They have a electric version one. Why don't you have that one instead?
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Old 01-04-2005, 10:22 AM
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Default RE: Vmar Easy 3D Conversion

Magna,

I'll into it. Thanks for the information.
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Old 01-04-2005, 01:43 PM
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Default RE: Vmar Easy 3D Conversion

The motor mounted easily with plenty of space in the left over firewall opening for the wires to run inside to the ESC.
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Old 01-05-2005, 03:36 PM
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Default RE: Vmar Easy 3D Conversion

Magna,

I found an interesting response on the availability of the electric version of the Easy 3D. Apparently, the distributor does not offer it in the U.S. due to the confusing choice of electric motors that are available. This is a recurring issue that has many glow-powered enthusiasts fearful of entering the electric flight scene.

One more reason to lead by example.
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Old 01-05-2005, 03:39 PM
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Default RE: Vmar Easy 3D Conversion

The fiberglass cowl fit perfectly over the motor and allowed the prop adapter to extend without any cutting.
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Old 01-06-2005, 09:12 AM
  #13  
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Default RE: Vmar Easy 3D Conversion

I used an [link=http://www.hobby-lobby.com/spinners.htm]HLHS225 2-1/4" Spinner[/link] from Hobby Lobby that fit well over my [link=http://www.hobby-lobby.com/elecprop.htm]APC 14x7[/link] e-prop and it was easy to install.

I cut out the pre-drawn area in the cowl to provide cooling air flow past the motor and into the fuselage area.
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Old 01-11-2005, 12:45 PM
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Default RE: Vmar Easy 3D Conversion

The linkage hardware all comes with the kit and the control horn holes are pre-drilled which makes installing the linkage a quick job.
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Old 01-11-2005, 12:50 PM
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Default RE: Vmar Easy 3D Conversion

The tail pieces needed some of the covering removed before gluing. Both stabilizers fit perfectly without any problems with incidence.

Again, 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 seperate linkages for each half. Perhaps the design was recently upgraded for added simplicity.
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Old 01-11-2005, 03:17 PM
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Default RE: Vmar Easy 3D Conversion

Greg,

I understand that when doing a review, you generally use the provided hardware to get a true objective view of the plane, but you might want to reconsider the aileron pushrods. Those grub-screw/EZ-connector style connections have been known to cause ulcers in R/C pilots when used on primary control surfaces. At the very least, consider filing a flat spot on the aileron pushrods, and using a little loctite on those EZ-style connectors on the aileron control horns if you haven't done so already.
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Old 01-11-2005, 04:35 PM
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Default RE: Vmar Easy 3D Conversion

Hi Matt,

You have a good point.

I did use Loctite on the threaded areas. I typically Loctite 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 but i'll keep an eye on it.

Thanks.
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Old 02-04-2005, 10:14 AM
  #18  
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Default RE: Vmar Easy 3D Conversion

I finally got around to installing the landing gear on my Vmar Easy 3D.

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.

The gear mains simply screwed into the pre-drilled holes on the fuselage bottom. The tailwheel assembly simply pressed into the pre-mounted brass tubing on the rudder and screwed into the pre-drilled holes on the bottom of the tail.
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Old 02-04-2005, 10:17 AM
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Greg Covey
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Default RE: Vmar Easy 3D Conversion

I may decided to increase the wheel size a bit if the pants drag on the grass. There is plenty of room left over inside the Funtana .90-size pants.

My Easy 3D was nearing completion and looking good!
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Old 02-11-2005, 10:14 AM
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Default RE: Vmar Easy 3D Conversion

I 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.

Again, 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.

I 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.
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Old 02-14-2005, 10:17 AM
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Default RE: Vmar Easy 3D Conversion

My Jeti 70-amp Opto ESC was connected to a 6v UBEC. I also added a Tower Hobbies System 3000 [link=http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXJC15]On/Off Switch[/link] assembly in between the UBEC output and the receiver.

The 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.

Since 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.
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Old 02-14-2005, 04:02 PM
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Default RE: Vmar Easy 3D Conversion

The 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 direction.

I 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.

Was my Easy 3D now ready to fly?
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Old 02-16-2005, 11:47 AM
  #23  
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Default RE: Vmar Easy 3D Conversion

My Vmar Easy 3D was looking good! Unfortunitly, 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 [link=http://www.hobby-lobby.com/servos.htm]HS-85 Metal Gear[/link] servos that weigh about half the weight. It will reduce 1.5oz in the tail section.
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Old 02-16-2005, 01:51 PM
  #24  
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Default RE: Vmar Easy 3D Conversion

Greg
I don't plan to be rude, ...but....
How can you find any pleasure with that kinda plane when you have done so many beautiful big conversions???

This is like looking in the mirror far back...
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Old 02-16-2005, 03:12 PM
  #25  
Greg Covey
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Default RE: Vmar Easy 3D Conversion

Luc,

It's a fair question.

Although I have many higher-end conversions, as you suggest, I still love to tackle a project where something different exists that I haven't seen before. In this case, the plane is a more rugged and heavy duty 3D design that I am anxious to compare with my Fun World EP from World Models. The Fun World EP is built incredibly light and is a great flyer. The disadvantage here is that you must treat it like a delicate princess. If you pick it up wrong or bang it against something, it will crack.

It is my hope that I have such outrageous power in the Vmar Easy 3D plane that it will fill a void in my other 50" 3D planes. Although it is what we think of as heavy, I hope to show this as an advantage to potential glow pilots with "big thumbs". Sometimes, a heavier plane is just a better fit for the weather or the person.
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