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HobbyKing HK-922MG Digital Metal Gear Servo 1.8kg/ 12g/ 0.07sec
Specially designed for helicopter and fast response applications. Its high quality motor allows longer run time on high speed. Compatible with many gyros such as Futaba 401,601.
I bought the Turnigy 3d-H gyro and I'm going to use it just as a tail gyro for now. I have this servo and I know I asked this question for the ZYX and was told 250hz for the tail servo frequency but the turnigy only has 165hz and 270hz, which one should I use so I don't smoke the servo and the gyro?
I would start with 165 Hz, fly a battery, land and quickly feel the temperature of the servo. If it isn't warm at all then I would try 270Hz. Since this is a digital servo, it should be able to accept 333Hz too (at least the HKSCM9-6 works well with 333Hz). And for the record, the ZYX outputs 333Hz to the tail servo when you have set it up for all digital servos (I have measured).
Isn't it better that the servo arms break instead of servo gears or pushrod links? With alloy arms, you basically know that you will get gear or link damage when you crash. For bigger helis, you want metal anyway due to the higher forces, but for a 450 it is not necessary in my opinion. Or do you actually break them without crashing?
This servo is a bit low on torque, I would use a standard servo like HKS9257. It's hard work for a servo to operate the tail, you need a strong and fast digital servo.
I have had a lot of problems with this servo on my HK250GT, had to reduce the proportional and differential gains a lot in both roll and aile, and it still wasn't stable, so I removed these servos and used them in planes without stabilization instead (where they have worked fine). For the ZYX, I recommend XGD-11MB, it's very cheap, has metal gears and works both in 250 and 450 helis on the swash (and it plays very nice with both ZYX-S and 3GX).
Well, I don't have the kind of stuff I would need to measure the real speed... but when I put it in the gear channel and flip the switch, with no load, the servo travels VERY FAST, noticeably does the travel in less than a second. And when I changed my heli tail servo for this one, the difference was big.
Select how many items using the QTY: drop down list above, then click on ADD TO CART to put the items in your shopping cart. Repeat this procedure for all the products you want. Make sure you don't buy items on Back order, because there is no telling how long you have to wait for certain items (i.e. only buy things HK has in stock). When you are done, click on VIEW CART, verify that you have what you want in the right quantities, then click on CONTINUE to go to checkout and paying (it's a few steps but it's pretty much self explanatory I think). Good luck!
does any one know what size the servo horns are the ones that came with the servo it to short for my E-Razor 450,it's gotall my arms at a big angal are goes it matter. thanks
Actually while you three are here another question please, ESC noted is TR_P40A but to keep it small i thought that the 30amp one would do the job,it does burst to 40amp and HK has in stock
Depends on the motor... 30A might be just tight. 30A ESC usually have 2A bec, and 4 servos plus radio and gyro, in strong manouvers, can push a 2A BEC to the limit. Just as Adbulahad said. I prefer 40A ESC for this helis.
Sorted out most for what i want for a new 450 heli pro v2 but there is so much info on servos that it confuses me, these seem pretty good so how about these all round (4 of them)any thoughts
I have used these on my HK250GT and got stability problems, I had to dial down proportional and differential gains on my ZYX-S to get the heli flyable. Same tendency on my T-Rex 450, where the heli also got somewhat unstable (oscillation tendencies in roll and pitch axis). But this was FBL in both cases, they might work fine if you use flybar. They are quite tall though, I couldn't fasten the canopy on the side where the pitch servo sticks out (I mount it on the outside for easier exchange). Now I use XGD-11MB instead and I'm very happy with them, good torque and centering, cheap and the two final gears are metal (more resilient to crashes, but that's the same as the 922's). I haven't used 922 on the tail so don't know how they work there (I use HKSCM9-6 on the 250 and Align 420M on the 450 for tail). HTH
This is a good servo to use on tail however, it will be very twitchy on the cyclic. A better option would be Corona 939MG Digital Metal Gear Servo 2.7kg/ 12.5g/ 0.13sec PRODUCT ID: DS939MG for the cyclic.
I've used this for the tail of 3 helis, are perfect for that. But for cyclic I prefer "HobbyKing 939MG Metal Gear Servo 2.5kg/ 12.5g/ 0.14sec". I've used them in 2 kits, a friend uses them in his heli, no problems at all. Of course there are a lot of choices and a lot of good enough servos with good price/quality ratio. It's a matter of likes and dislikes.
yes i just got this hk922 today got it put on my e-razor 450 got it setup but it spins out of control it will not center i have tryed everything to get it to center i got the gy48v gyro on it.can any one tell me what i done wrong. i put the stock servo back on and it fly great.
Try to connect the hk922 servo on a spare channel on your receiver (without the gyro) and check the movement. If the servo still rotates uncontrollably then the servo is faulty. Otherwise you will probably have to check the settings of your gyro.
These work perfect with the ZYX-s on my 450 on all 4 . The only problem is the servo horns are very brittle. I ordered some horns for a different servo and will report back with compatability.
Yes, they break if you look at them hard. All my swash ones broke off, and it was not even a crash, just a blade strike. Will be interesting to see your findings.
Up date , I just recieved the horns for the 922MG and they fit perfect. These are the same as for the Align DS410 servo, the Align part number is # HSP41003T.
For future reference, these 922MG are excellent servos, but DO NOT use the supplied horns.
One broke on me during lift off yesterday and the blade broke the canopy on my airwolf fuse, the other 3 that broke were during a light blade strike.
You can use them, but beware that they are quite a bit taller than the A-ign ds410, so if you mount the pitch servo on the outside of the heli (for easier replacement), then the canopy won't fit on the side where the servo protrudes. Apart from that they work fine on a 450 swash.
1.6 kg of torque is a bit small for the 450 swash. It's a very good and fast servo for tail, but for swash I would use stronger ones, like HK939MG, 2.5 kg-cm of torque.
These servos will be a bit twitchy on the cyclic and their torque is less than the recommended minimum by Align. I would recommend HK939MG as Gerry01 suggested.
I can confirm the twitchyness when using these on cyclic (I have them on the swash on a HK250GT FBL). Had to decrease roll and pitch gains on the ZYX-S to get the heli stable. So there are better choices than these servos for swash. I used XGD-10HM on the swash previously, was very happy with them (they also have 2.5 kg torque).
Just a suggestion, would you consider to buy a different gyro? Turnigy head lock servo, it's a Telebee, works great, it's better than the 401. If you're going to spend more money, it is an option.
someone flies HK450PRO V2 with gyro HK401? which the servo?
Are you recommending me servos with 0.12 to 0.14seg. .
it will work fine?
The gyro HK 401 have digital/analog servo setting.
You should use HK-922MG servos for the tail. These servos are fast and have metal gears which are more resistant to crashes. Yes HK 401 gyro has an analog/digital switch.
I have a HK 450 V2 and HK 450 PRO with "Hobby King 401B AVCS Digital Head Lock Gyro" and "HobbyKing HK-922MG Digital Metal Gear Servo 1.8kg / 12g / 0.07sec" and I can not estabilisar.
However other "HK 450V2" with the same gyro and another servo flies perfect.
You can use this one: 9378000004 (Turnigy XGD-11MB). It is small, strong, digital and has metal gear on the end gears. I have used XGD-10 on 250 swash, very happy with them (the XGD-11MB) is very similar but has ball bearing on the final shaft). HTH
E-razor servos are 24x11 mm and this are 23x12, they will fit. And are 1.5 kg-cm, and this is 1.6 kg-cm. So power is the same. But this is servo for the tail, fast digital response, I think it has a bit of jitter for cyclic. I use HK939MG for cyclic, are also metal gear adn have 2.5 kg-cm of torque* and I use this 922MG for the tail. No problems at all on any of my kits. Good luck!
Has anyone found some less brittle servo arms for this one yet ? Or for that matter, just a direct replacement? These seem to be made of glass, tho the servo itself is great.
Hi all,
I have Tarot 450 pro heli. I plan to use 4 of these servos for elevator, aileron, pitch and rudder.Will i have a problem cause I am using same servo?
No, by itself it is not an issue to use the same servo for both swash and tail, as long as each use requirement is covered by the servo specs. This is a pretty fast servo on 6V, so it should work OK on the tail. It has enough torque (at 6V) to cope with the swash, but I would choose a servo with at least 2.2 kg torque, which is the minimum that A_l__i_g_n recommends for 450 size helis. I use these on the swash of a HK250GT and I noticed that the increased speed (compared to XGD-10M that I used initially) resulted in some wobbling in roll and pitch axis, so I had to dial down differential and proportional gains a bit on my FBL unit (ZYX-S). But if you run flybar, this is not an issue. HTH
My problem has been resolved thanks to Cheryl * HK's CS. I don't know why the people I've talked to before could not or would not help me. Many Thanks to her on doing her job. Give that girl a raise. She had the problem sorted with in a few minutes. Thanks to her help my order is being packed as I speak. Customer Service Means, Customer Service. Thank you again Cheryl * CS Maybe your co-workers could learn from you.
I've contacted CS several times about the discrepancies between the product page and my invoice. My invoice still says (back-order) and as you can see (at the time of this post) it is not. Some body DO SOMETHING! The last thing I want is the 9xr to return to stock and my order still not being fulfilled because of this issue. As you may see from my last post its been one week, still not resolved.
Gery01 Yea it says the 9xr and this servo, both on back order. But why does this servo list as on back order on my invoice and this page for the product states that its very much in stock. I contacted customer service about it and they said check back in 24 hrs. That was four days ago. Its been like that since i placed my order. Although when i place my order the stock numbers show what they show now.. 10
That's strange. I have had a lot of items in backorder, and it's the opposite: once it's in stock, even if it goes out of stock again, it stays ok in your order. Keep on with customer support. In teh worst case you may cancel the servo from your order, and do a separate order for it.
Funny to see these are in stock considering that I have one of these ordered and my invoice states that it is on back order, along with my 9xr. Guess its a glitch, for a few days.
I cannot agree. This is a Henge D922MG. Very good quality. I use it on my HK 450 Pro and it works very well. No jitter, strong and fast. I can agree that it sounds bad, but i have not had any issues with this.. At this price i would buy alot before they go BK.
I cannot agree. This is a Henge D922MG. Very good quality. I use it on my HK 450 Pro and it works very well. No jitter, strong and fast. I can agree that it sounds bad, but i have not had any issues with this.. At this price i would buy alot before they go BK.
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Overall Rating
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Like it?
Optical slower than "Turnigy MG90S Metal Gear".
In plus is more precise in end position (fast move to end).
My aplication is for 250, very good montage.
If You request mini Digital servo buy This.
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