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Old Jan 06, 2013, 10:58 AM
KDS450QS(ZYX4),V977,CX-20
FyreSG's Avatar
United States, CA, Monterey
Joined Apr 2012
5,589 Posts
Mini-Review
WLtoys V912 4-Channel Fixed Pitch Helicopter Mini-Review



Introduction

I’ve always wondered how is like to fly “big” fixed pitch flybar helicopters. I have several V911 which are a breeze to fly. I progressed to a KDS 450QS and it was a whole new level in terms of control and speed. After mastering non-3D flight with my 450, I thought about this - what happens if a V911 is enlarged? Would it be more challenging and more fun to fly? I’d like to find out if this helicopter is a worthy upgrade from a V911.

I was glad that Tmart decided to send me a WLtoys V912 for review.

Packaging



The package is huge! It was as tall as my 1.5 year old son!



Tmart did a nice job in protecting the package by providing additional bubble wrap at the vulnerable part of the box. Good job!

The foam box was rather tightly secured to the cardbard box, but the effort in pulling out the foam box was worthwhile.




V912 vs the Rest

The bird is huge, when it is compared against V911 or V922.





Smaller brother V922 and bigger brother V912.



But when I took out my 450, we know who is the boss!





Don’t you just love BIG helicopters?






Up Close with the V912

The bird is heavy. For a start, you can find mostly metal pieces on its body. It also has a huge 2S battery and a monstrous main motor.



The two servos and swashplate did not come perfectly level. It is a must to level the swashplate. Do not depend on the electronic trims (on the TX) because you need them for quick trimming when you’re in the field. If you used up all your electronic, you’re out of luck!

If you’re not used to reparing helicopters, it could be quite painful to sort out the servos. Like my 450 heli, I wanted to level the servos. I examined the bird in detail to find the best way to extract the servos out of the body. In the end, I took the shortcut - I left the servos in the body while I removed the servo arms. It’s hard to do that, especially when you have fat fingers.

I set all trims to neutral and powered up the bird. After it initialized I took out the servo arm and tried to put it back at a horizontally level position. To my disappointment, there is no way to do that. It’s either too high or too low. And there is no subtrim to fix this. I picked the lower position for both servos. Bad idea.

After putting everything back, I realized to level the swash, I had to lengthen the linkage rods. And I needed to lengthen quite a bit which made the linkage rods on the verge of separating! I was lazy and left it that way.

In the end, I got a horizontally leveled swash.





Saying the tail blade is big is an understatement. I have no worries of its heading hold ability just by looking at the size of the tail blade.



The receiver board mounted horizontally above the huge battery. There is a spare connector for additional LED light.



The battery could be removed for charging. This may be required if you intend to charge it with your computerized charger and you find that the JST and balance lead are too short. But if intend to charge with the stock charger, it should not be a problem.



The head light is very bright. It blinded me when I tried flying it towards me at night.




Transmitter

Like the V922, this transmitter is a big leap from the previous E728. It looks and feels like a hobby grade transmitter.


6-Channel Transmitter for V922 vs 4-Channel Transmitter for V912


It supports Modes 1 to 4 - throttle and/or rudder can be on the left or right stick. To switch between modes 2 and 4, while it is powered off, hold on to the “Left” button at the right of the LCD display, then power it on.

I’m pretty disappointed with the transmitter. I was hoping that it could support configurable rates. To toggle between the predefined low and high rates, press the top-left corner button.



Low rates are only suitable for indoor flight where there is no wind. But you really wouldn’t want to fly such a big heli indoors. At high rates, the helicopter flies fine outdoors.
Strangely, the lights button doesn’t on or off the lights despite showing the status change on the LCD display.

It has the same annoying start up beep like the rest of WLtoys 4-channel transmitters. It was able to bind with my V939 but I didn’t have the time to fly my quads with this transmitter.


Flight Experience

Avoid applying throttle too quickly when spooling up. Give the tail some time to kick in. But take note that the helicopter lifts off at 45% to 50% throttle.

Like the V911, it drifts left as it lifts off the ground. However, the left drift is much more pronounced in this bigger bird. Just make it a habit to apply right aileron as it lifts off.

While it is hovering in the air, it needs around 40% throttle. I’m not exactly used to flying helicopters at low throttle. What this also means is that the bird has plenty of power. I gave it a 80% throttle boost and it rocketed up into the air. I don’t remember my V911 to be able to do that.

At the ground effect zone, the bird is not as stable as a 450 CP helicopter, but is easier to handle than the V911. But avoid lingering at low altitude as you really need to be very familiar with the required throttle inputs in to prevent hitting the ground.

Piros are surprisingly fast. You can see this in my video. The bird does not have the same overly sensitive rudder as the V911. You do not need to concentrate on applying small amounts of rudder during banked turns.

Just like the V911, right banked turns are very easy to pull off but left banked turns are tricky. It’s gonna take me a while to get that right.

Cyclic stick movements are like the V911 - not too sensitive - and the bird is easy to move about with the elevator and aileron controls.

Forward flight feels a little harder than the V911, perhaps because the tail is heavier than the nose. As the helicopter stops, it seesaws slightly, again may be due to the heavier tail. I checked the center of gravity and found the tail to be very slightly heavier than the nose.


Tail is slightly heavier, not very apparent from the photo.

Perhaps I could improve forward flight by removing the tail boom support brace and the tail horizontal fin.

I’m not sure if all fixed pitch flybarred helicopters can’t handle winds well, but for my V911 and V912, they are quite affected by light gusts of winds. However, I do notice that the V912 performs better in windy conditions that V911. As a safety precaution, apply the wind-countering stick movements when the wind starts blowing. It takes time for the helicopter to react to it. If the wind is gentle and does not affect your flight, you may apply counter stick movement to correct the wind-countering stick movement. If you managed to counter the wind, good job. Else, the wind is too strong for your helicopter, land it. Your resistance is futile.

Remember, this is not a V911. If you lose control, either the heli is gonna get hurt, or somebody, or something is gonna get hurt. Did you see how big the metallic flybar is? And let’s not forget the metal landing skids.

It was a unique experience flying a large FP FB helicopter. It’s definitely more challenging than a V911, because of the heavier weight and corresponding higher inertia. Anyone who is overly familiar with a V911 should start off this helicopter really slow. You don’t want to discover it’s “different” when the large, heavy bird is in a difficult to handle situation.

Now that I shared my thoughts on the difference of flying the V912 vs V911, let’s visit the next question - is it a worthy upgrade from a V911?


Progressing from V911 to V912

The short answer is - YES!

If you’re looking for a more challenging FP FB helicopter, most likely you’d like a bigger one that handles wind (slightly) better, and demands more of your focus and attention. The consequence of crashing a V912 is far greater than a V911 so this adds on to the challenge of flying a V912.

As this is a larger, heavier, more powerful bird, it can fly at a much faster pace. This can be really fun to you adrenaline junkies out there. I tried tight U-turns with this bird and I must say the feeling was great! The sound of the main rotor blades cutting the wind, and the tail blades working really hard, as the big V912 U-turned right in front of me, was extremely thrilling. I think it was captured in my video.

I’ve flown collective pitch helicopters to know that it is (obviously) different from a FP FB helicopter. I’m also aware that there are folks out there who can’t seem to pick up the skills to fly a CP heli. In this case, the V912 may be just right!

As for using it to prepare for a 450 CP helicopter, well, I don’t really that it would help. This is largely because the V912 is far too stable as compared to a CP helicopter.


Conclusion

WLtoys V912 is stable and fun to fly. Experienced V911 pilots looking for something that flies different or more of a challenge may find this a worthy upgrade. The main gripe I had with the V911 is the twitchy tail (I did not perform the resistor mod), and I’m glad the issue does not exist on V912. This makes banked turns really easy with the V912. If I had not fallen in love with CP helicopters, I’d be flying my V912 regularly.


Gallery

Outdoor Flight Video:

WLtoys V912 4-Channel Fixed Pitch Helicopter (4 min 5 sec)



Photos: http://www.flickr.com/photos/fyresg/...7632447963389/


Pros
+ Very good rudder control; tail holds very well
+ Handles wind well, better than V911
+ Inherited the high stability of V911
+ Powerful main motor

Cons
- Needs tweaking to ensure swashplate is level
- May need to shift the center of gravity closer to the nose, to improve forward flight
- No spare battery


Useful Links

V912 RTF: http://www.tmart.com/Wltoys-V912-4-C...ampaign=rcheli

(More to be come...)
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Old Jan 06, 2013, 11:34 AM
Scotsman in Germany
tiggertoo1962's Avatar
Germany, BY, Schwabach
Joined Oct 2012
1,840 Posts
Quote:
Originally Posted by FyreSG View Post
It has the same annoying start up beep like the rest of WLtoys 4-channel transmitters. It was able to bind with my V939 but I didn’t have the time to fly my quads with this transmitter.
Be interested to find out if it can also bind with the V911 and fly it comfortably (or if the FlySky 9x would bind with this bird it'd be even better ) Probably too much to ask though

Just bought myself a F645 as I want to move up to bigger helis, but this would certainly be worth looking at as an alternative. Wonder how long it'll be til the more experienced guys on the forum start modding it

... oh, and thanks for the review Fyre. Well done, as ever.
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Last edited by tiggertoo1962; Jan 06, 2013 at 11:39 AM.
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Old Jan 06, 2013, 11:43 AM
Registered User
United States, SC, Irmo
Joined Sep 2011
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Great review, thanks. I am greatful that people like you post reviews of these things. I
am glad you get a free one for review. It seems that this will bind with a 9x, right? I also want to see more reports of flying in wind. I wanted to buy an MJX F45, but didn't cause it did not bind with any Tx I have. If this does, I might be interested.
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Old Jan 06, 2013, 11:58 AM
Scotsman in Germany
tiggertoo1962's Avatar
Germany, BY, Schwabach
Joined Oct 2012
1,840 Posts
Quote:
Originally Posted by shahram72 View Post
Great review, thanks. I am greatful that people like you post reviews of these things. I
am glad you get a free one for review. It seems that this will bind with a 9x, right? I also want to see more reports of flying in wind. I wanted to buy an MJX F45, but didn't cause it did not bind with any Tx I have. If this does, I might be interested.
Since I only have the stock V911 TXs and a DH9116 TX which just sits there gathering dust as I don't like the throttle, the TX non-compatbility problem wasn't an issue for me. I went for the F(6)45 mainly due to durability, which I reckon the V912 probably can't match.

Think I'll fly my F45 for a while and try to reduce my crash-rate with it before I consider a V912, but I'll certainly be keeping an eye on it for the near future when The Wife has released her iron grip on the purse strings somewhat. Maybe by that time they'll have revised the pcb (like they've just done with the MJX) and got a few of the other teething problems (like the squiffy swash) out of the way
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Old Jan 06, 2013, 12:54 PM
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Thanks for the review! This will probably be my next purchase
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Old Jan 06, 2013, 02:48 PM
Amateur copter crasher.
United States, OH, Worthington
Joined Dec 2012
135 Posts
Very good review! Once I am fully proficient with my 911, and am ready to go to a bigger copter I will definitely get this one. I'm not too happy, you have to level the swash and all that.. seems like quality control issues. However, by the time I get mine, they'll get better.
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Old Jan 06, 2013, 03:07 PM
Different fly 4 different guy
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Joined Jan 2011
1,899 Posts
That is a great review.

The v912 seems to be in the same category as the MJX F46 and DH9116.

It is interesting that you needed to level the swash on it though. I have a number of various sized fp's (Solo Pro 260/228/328, V911) and on none of them is the swash level when adjusted to perfect hover. I thought that was just a cp thing?

I would be interested in how the tx flys the v911 and WL quads.

regards . . . g
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Old Jan 06, 2013, 03:12 PM
ITS ME DAVID's Avatar
United States, CA, Los Angeles
Joined Apr 2011
596 Posts
Thanks for the review this will be the next purchase once I master the v911 thanks.
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Old Jan 06, 2013, 03:43 PM
Quads Helis Planes Cars
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Old Jan 06, 2013, 07:57 PM
Yo R Wee Too Lo
United States, OH, Cleveland
Joined Oct 2011
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just ordered one,
great review thanks



tonytester
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Old Jan 06, 2013, 08:30 PM
KDS450QS(ZYX4),V977,CX-20
FyreSG's Avatar
United States, CA, Monterey
Joined Apr 2012
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Thanks to everyone for your compliments.
Quote:
Originally Posted by gordonzo View Post
It is interesting that you needed to level the swash on it though. I have a number of various sized fp's (Solo Pro 260/228/328, V911) and on none of them is the swash level when adjusted to perfect hover. I thought that was just a cp thing?
Allow me to elaborate as I had left this out in the main review. I tried to fly it out-of-the-box with the swashplate not level. It was drifting so much that full stick movement could not keep it from drifting away. I also tried full trims but they couldn't help. That's when I decided to set it up correctly. The manual provided instructions to level the swashplate. I'm sure they included the section because it was necessary.
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Old Jan 06, 2013, 09:31 PM
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Joined Jan 2013
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Hi, 2 questions:

Do you know where I can find how to learn to level the servos and swashplate?

And would you recommend this heli to a v911 user who doesn't know how to level a swashplate? Thx for the vid and revieuw!
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Last edited by Poebeer; Jan 06, 2013 at 09:36 PM. Reason: bad english
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Old Jan 06, 2013, 10:06 PM
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Tucson, Az
Joined Feb 2007
8,594 Posts
Having to adjust a 4 ch F/P heli is kind of bogus. I'm sure many will feel a badly out od trim heli is a very bad sign. My feeling is get good with V911/ do get a good quad V929 not tamed down V949. and fly snot out of them. Skip a big 4 ch F/P as you will get bored and get a c/p heli. Super c/p/ Masterc/p will fly better than this and be more stable. If you really like helis you are going to get a c/p anyway. 250 size is to big for inside a home and any wind you may loose your bird. C/P handles wind also a Quad. Is this T9X compatible?? Thank you for a good review and telling it the way it was. After the lousy V939 little let down with WL toys. V929 great/ V911 another fine machine...> V939 unstable/drift king.
I have to bind it everytime I fly it. I had it bound to T9X and lost bind. Only thing it binds to is toy stock TX. I hear V922 is unstable and hard to fly....> who needs it?
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Old Jan 06, 2013, 10:32 PM
KDS450QS(ZYX4),V977,CX-20
FyreSG's Avatar
United States, CA, Monterey
Joined Apr 2012
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Quote:
Originally Posted by Poebeer View Post
Do you know where I can find how to learn to level the servos and swashplate?

And would you recommend this heli to a v911 user who doesn't know how to level a swashplate? Thx for the vid and revieuw!
It's stated in the manual. Don't worry about it. When you receive your V912, try to do it yourself. If the manual doesn't make sense to you, you may ask specific questions here.
Quote:
Originally Posted by dankar04 View Post
I have to bind it everytime I fly it. I had it bound to T9X and lost bind. Only thing it binds to is toy stock TX. I hear V922 is unstable and hard to fly....> who needs it?
Oh, I just remembed I had left this out:

Like the the V939, you have to power on V912 then power on the transmitter. Apparently, it has to bind everytime.
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Old Jan 06, 2013, 10:45 PM
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http://www.hobby-wing.com/wl-v912-4c...opter-rtf.html
The price is $65, not include the shipping.
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