Walkera V120D02S V2 Helicopter Review

 

Walkera V120D02S Helicopter

 

RC Pro Review by: Tom Zadar

 

Transmitter Setup Guide

See my Transmitter Setup Guides for transmitter setup. The setup guides have all of the transmitter settings needed to make a model completely from scratch.
The Tx Setup Guides have different difficulty settings depending on which setup guide you choose. For Helicopters there are Standard Settings, Beginner Settings, 3D Settings. For Quads there are Standard Settings, Beginner Settings, 3D mode settings.
Each setup guide includes everything needed for setup including Model Type, Swash Type, Servo Reverse, Travel Adjustment, Gyro Gain, Throttle Curves, Throttle Hold, Pitch Curves, Pitch Curve/Throttle Hold, Subtrim, MIX, Switch Assignments, Dual Rate and Expo.
I added a bonus to every setup guide with a Dual Rate and EXPO settings guide I made for Helicopters and Quads.

 

Review

Walkera V120D02S V2 – 6 Axis Gyro

 

Overview:

The V120D02S V2 is a 6 Axis Helicopter with an outrunner brushless motor and shaft driven tail.
It has the RX-2636H-D which has telemetry of temperature and voltage. You can upgrade the receiver online.

 

First Impressions:

The helicopter looks nice. The green color canopy can been seen much better than the red canopy.
I also have the Walkera 4G6 w/RX2010V2 and flybar and I noticed the V120D02S V2 has a much thicker main gear using a .4 mod teeth, tail gears are bigger with thicker teeth, and the tail shaft is metal. The main shaft is longer and is .5mm thicker. The fins are also different and are thicker and larger in size. The feathering shaft looks like it is bigger and/or thicker. The landing gear looks the same on both helicopters except the V120 has two supports on the side of the RX to mount the ESC on.
Canopies of both helicopters are different sizes.
The tail boom and complete tail assembly look the same on both helicopters. The V120 has larger tail blades though.
All the servos are the same on both helicopters.

 

First Flight:

My first flight was a hover inside my house to test it out before I fly it outside.
I am using the Devo 10 transmitter.
The power and climb out is good with the stock motor and battery. The tail held well in pitch pumps.
The nose was drifting to the left a bit so I adjusted the tail servo by moving the
tail servo mount a bit away from the frame. Now the tail holds well.
Next I balanced the main blades which were way off, and leveled the swash which was off a bit but was pretty close. It was tilted down and to the right (looking from behind). The swash was at zero degrees pitch at mid stick and the blade tracking was perfect.

My next flight outside was nice and smooth. The heli had good power, climb out, tail holds well, and flight time is great. 7 full minutes with the stock battery!
The stock battery is really good. It provided great head speed, thrust, and flight time in my tests which I have listed below.

I charged up the battery again to start making some videos outside and the ESC burned out! It would no longer start the motor.
I emailed Bob where I bought this helicopter at and he sent me a new ESC at no charge which was nice of him to do.
When I got the new ESC I took headspeed, thrust, and flight times.
While I waited for the ESC I put in my XP-12A-2 (V2) High Speed ESC. WOW! This really gave the motor more power and higher RPM!
Plus it is 1 gram lighter than the stock ESC.

I wanted to do tests with my Turbo Ace 915 motor but I don’t have a .4 mod 9T and 10T pinion for it.
The stock motor pinion hole needs to be enlarged a bit to fit on the TA915 motor. I don’t want to take a chance should I ruin the pinion
I will have a heli with no motor to use.

 

Pros:

  • Sharp looking, fast, responsive, super stable, smooth flying, tail holds well, and flips and inverts well. I am using 65% H/L pitch travel adjustment on my Devo 10 and the motor is not bogging.
  • Brushless motor with good power and climb out IMO. The XP-12A-2 (V2) High Speed ESC gave the motor more power and higher RPM.
  • Receiver can be firmware updated by the user with the UP02 upgrade cable and adapter and software.
  • Telemetry of Temperature and voltage

Cons:

  • The canopy and landing skids broke very easy on a mild crash in grass even with hitting throttle hold before I crashed it.
  • Battery time using the telemetry is terrible. Less than half the flight time using telemetry. See my telemetry note below.
  • My ESC burned out after only two battery packs.

 

Telemetry:

I have found out that using the telemetry eats up the battery time.
I went from 5 full minutes of flight time on my Master CP with telemetry
inhibited in the TX to 1:25 minutes flight time with the telemetry enabled.
I found the same thing with my Mini CP, 1:25 minutes flight time with the telemetry enabled
and 3 minutes flight time with the telemetry inhibited.
My friends Mini CP had the same results as I did with telemetry inhibited and enabled.

 

 

Slipper Clutch Mod

I have not tried the slipper clutch mod for this or my Walkera 4G6 w/RX2010V2 and flybar.
Haven’t stripped any tail gears in years so I don’t plan to use the clutch mod.
I had a few crashes inverted with my new V120D02SV2 trying to bring in the heli too close and too low to make my videos.
The tail gears help up perfect. I even took apart the tail gear metal cover plate to inspect the tail gear to see if it had any
damage to it and it was in perfect condition. I was expecting some kind of damage but there wasn’t any.
The bigger with thicker teeth tail gears worked well.

The slipper clutch mod sounds good for beginners or if you are crashing and stripping tail gears often.
I have read posts that the clutch has slipped on hard moves or 3D but this might be because it was not adjusted correctly
or the aftermarket motor was too powerful for the clutch to hold.

These are the slipper clutch mods I have seen on the threads and I have posted links for you.
I can’t recommend any of them as I haven’t tried them out.

 

EDIT: 11-17-12

I have now tested the clutch below. Here is my review.

http://www.rcproreviews.com/microlinehobbies-adjustable-clutch-for-walkera-v120d02-4g6-helicopter-review/

 

Walkera Adjustable Tail Clutch

http://microlinehobbies.com/Tailgear.htm

 

 

Specifications:

1). Main Rotor Diameter: 308 mm
2). Tail Rotor Diameter: 85 mm
3). Overall Length: 290 mm
4). Weight: 100g
5). Gyro: 6-axis
6). Battery: 3.7V 600mAh Li-Po
7). ESC: WK-WST-20A-L
8). Brushless Motor: WK-WS-15-001
9). Receiver: RX-2636H-D
10).Servos:WK-02-1
11).Transmitter:Selectable

 

Batteries that I have tested so far:

  • Stock Fullriver 600 mAH 20C Battery
  • Turbo Ace Linear CG Battery 650mAh 25C
  • Turbo Ace 600mAH 20C Battery

 

Head Speed: – Stock Fullriver 600mAH 20C Battery – Stock Motor – Stock 20A ESC

  • 4,710 RPM at mid stick 100% throttle with the stock battery.

Head Speed: – Turbo Ace 600mAH 20C Battery – Stock Motor – Stock 20A ESC

  • 4,350 RPM at mid stick 100% throttle with the stock battery.

Head Speed: – Turbo Ace Linear Battery 650mAh 25C – Stock Motor – Stock 20A ESC

  • 4,560 RPM at mid stick 100% throttle with the stock battery.

Head Speed: – Stock Fullriver 600mAH 20C Battery – Stock Motor – XP-15A-2 ESC

  • 4,830 RPM at mid stick 100% throttle with the stock battery.

Head Speed: – Turbo Ace 600mAH 20C Battery – Stock Motor – XP-15A-2 ESC

  • 4,470 RPM at mid stick 100% throttle with the stock battery.

Head Speed: – Turbo Ace Linear Battery 650mAh 25C – Stock Motor – XP-15A-2 ESC

  • 4,740 RPM at mid stick 100% throttle with the stock battery.

 

Thrust: – Stock motor – Stock Fullriver 600mAH 20C Battery – Stock 20A ESC

175 grams full negative pitch in stunt mode at 100% throttle

Thrust: – Stock motor – Turbo Ace 600mAH 20C Battery – Stock 20A ESC

139.5 grams full negative pitch in stunt mode at 100% throttle

Thrust: – Stock motor – Turbo Ace Linear Battery 650mAh 25C – Stock 20A ESC

172 grams full negative pitch in stunt mode at 100% throttle

Thrust: – Stock motor – Stock Fullriver 600mAH 20C Battery – XP-15A-2 ESC

187 grams full negative pitch in stunt mode at 100% throttle

Thrust: – Stock motor – Turbo Ace 600mAH 20C Battery – XP-15A-2 ESC

155 grams full negative pitch in stunt mode at 100% throttle

Thrust: – Stock motor – Turbo Ace Linear Battery 650mAh 25C – XP-15A-2 ESC

176 grams full negative pitch in stunt mode at 100% throttle

 

Flight Time: – Stock Fullriver 600mAH 20C Battery – Stock Motor – Stock 20A ESC

  • 2 Minutes: 3.93V
  • 3 Minutes: 3.85V
  • 4 Minutes: 3.80V
  • 5 Minutes: 3.74V
  • 6 Minutes: 3.71V
  • 7 Minutes: 3.69V

Flight Time: – Turbo Ace Linear Battery 650mAh 25C – Stock Motor – Stock 20A ESC

  • 2 Minutes: 3.92V
  • 3 Minutes: 3.82V
  • 4 Minutes: 3.76V
  • 5 Minutes: 3.73V
  • 6 Minutes: 3.70V – Power got very low at 5:40 and I had to land.

Flight Time: – Turbo Ace 600mAH 20C Battery – Stock Motor – Stock 20A ESC

  • 2 Minutes: 3.88V
  • 3 Minutes: 3.80V
  • 4 Minutes: 3.74V – Big power drop at 3:25 minutes

Flight Time: – Stock Fullriver 600mAH 20C Battery – Stock Motor – XP-15A-2 ESC

  • 2 Minutes: 3.96V
  • 3 Minutes: 3.89V
  • 4 Minutes: 3.82V
  • 5 Minutes: 3.76V
  • 6 Minutes: 3.72V
  • 7 Minutes: 3.70V

Flight Time: – Turbo Ace Linear Battery 650mAh 25C – Stock Motor – XP-15A-2 ESC

  • 2 Minutes: 3.89V
  • 3 Minutes: 3.80V
  • 4 Minutes: 3.74V
  • 5 Minutes: 3.70V
  • 6 Minutes: 3.68V

 

 

 

 

 

Walkera V120D02S V2 – Complete Overview

 

Walkera V120D02S V2 – Close-ups

 

Walkera V120D02S V2 – Indoor Flight

 

Walkera V120D02S V2 – Outdoor Flight

 

Walkera V120D02S V2 – Flip & Invert (1)

 

Walkera V120D02S V2 – Flip & Invert (2)

 

Walkera V120D02S V2 – Crashes

 

 

 

 

“My text, pictures and videos are Copyright 2009 – 2017 Tom Zadar”