HobbyKing GA-250 MINI-MEMS Gyro

 France 26 points

quick question. just trying to cover everything before farther answer. are you in the correct setting menu? there are 2. one for frequency and delay (initialize this as you power up the gyro and toggling the hh and rate switch) the other is for servo travel and limits (initialize this by holding the rudder stick all the way left or right and toggling the hh and rate switch).

 EvzEn 19 points

Hi, thank you for your reply! Yes I am in right menu, actually I set this gyro many times before and I dont have problem until now.. I set the servo without servo connecting and I follow blinking red LED but after power off and on again the red LED blinks one time more than before.. I do not understand, maybe I'll buy new gyro..

 France 26 points

ok. well out of my 3 ga250 1 started having similar problem not too long ago. I've had all 3 a little less than a year and been working properly except the one recently. it would reset the servo frequency to default (5 red blinks) I've set it back to one red blink many times till I went flybarless. I'm guessing this is problem that occurs to the gyro after awhile since other people have mention the same frequency resetting problems. Sorry I don't have an actual solution but maybe just have to replace :(

 France 26 points

you sure can

 SINGH09 7 points

yeah you can use this .. its a great gyro for 250 and 450 size helicoters..

 Rottweiler.ve 2 points

Well, I'm sure that almost any gyro was designed for Heli equipment, eh eh. However, many rc plane pilots use hely gyros on their models.

 r_g_r 1123 points

There is none! It's just two different terms for the same behavior. Without any stick input the gyro always tries to turn the helicopter back to the last known direction.

 SINGH09 7 points

both are one and the same thing.. in business its mostle called Head lock gyro.. but some people also call it tail lock gyro.. thats quite obvious that the tail will be locked in one position if the Head is locked... no difference..

 Rottweiler.ve 2 points

"Head lock" or "Tail lock" or "AVCS", three words and one meaning.

 dhruvafreak 535 points

It can be used for sure but keep in mind that you use Only Digital Servo and you can adjust the gain only through TX So your receiver should have spare channel

 dhruvafreak 535 points

thanks for the credit bro

 Johnny66 30 points

Yes all trims are zeroed! As I said, both rate and HH feel exactly the same as if it's stuck on rate mode. I swapped it out for a standard gyro and all was good! I'll try another one on my new _Align _Trex 450, when I build it sometime next week!

 galaxy76 66 points

Non é* un problema di gyro. Questo é* tipico di sbilanciamento delle pale di coda. Prova a cambiare tutto il gruppo di coda.

 Johnny66 30 points

Sorry, I don't understand your language!

 Rottweiler.ve 2 points

galaxy76 said that your problem may be caused by an inbalance of tail rotor.

 Johnny66 30 points

No, definitely not an imbalance of tail rotor! I put a generic gyro on (GAZ-126) and it worked like a charm.

 Rottweiler.ve 2 points

If you have purchased 4 gyros, and 2 of them don't work correctly, you can try with 2 others.

 Johnny66 30 points

Yes, I will build my _Align 450 (older model, got it very cheap!) this week with one of the other 2 of these gyros I have not used yet!

 galaxy76 66 points

Schottky Schottky Schottky :P

 dhruvafreak 535 points

thanks for the solution

 galaxy76 66 points

provare per credere :)

 Rottweiler.ve 2 points

Ma dai?

 France 26 points

I have 3 of these gyro and one has the exact same problem every now and then the gyro resets to factory settings. I had no problems with the other two. I could not figure out why. I swapped them out with the same results. Sorry I never found a solution. I eventually just replaced it cause I got tired of having to set the servo frequency all the time lol.

 galaxy76 66 points

thanks for the reply. so it is a problem that afflicts some specimens. after what you've got problems?

 ray 25 points

have been having the same problem but worse it wont let me in to set the frequency and delay then when it does it drops my setup and sets all the frequency /end points to random settings maybe it should be the bin for this one

 r_g_r 1123 points

For the 250 and 450 size helis the "D922MG" servo works very well. For 500 size you might need something stronger like for instance the "3688HB" servo.

 firefox67501 24 points

Thanks for the info

 r_g_r 1123 points

Google for "HK450 Configurator" there you find the best matching parts for the HK450 kits.

 abdulahad100 363 points

Use Corona 939MG Digital Metal Gear Servo 2.7kg/ 12.5g/ 0.13sec PRODUCT ID: DS939MG on the swash plate. This is a digital servo with metal gears. It is more resistant to crashes.

 r_g_r 1123 points

The HXT900 is not a good choice for a tail servo. It will work if you just hover or maybe fly around a bit. But you should get a digital servo. There are very cheap digital servos that cost almost nothing and perform very well. Like e.g. the D933MG servo.

 r_g_r 1123 points

Sorry I meant the D922MG. The D922MG is quick enough for a tail servo. The D933MG is slower.

 r_g_r 1123 points

Enter D933MG into the search at the top of HobbyKing's website and you'll find the servo.

 r_g_r 1123 points

Sorry I meant the D922MG. So please enter "D922MG" into the HobbyKing search.

 r_g_r 1123 points

I'm using the: D933MG Digital Metal Gear Servo

 r_g_r 1123 points

You can also Google for "HK450 Configurator" there you find the best matching parts for the HK450 kits.

 iniazi 4 points

D933 also, I use Futaba S9257 Servo (or get a clone make sure its metal gears,etc.)

 abdulahad100 363 points

Use this servo HobbyKing HK-922MG Digital Metal Gear Servo 1.8kg/ 12g/ 0.07sec PRODUCT ID: HK-D922MG. Its low cost and works really well

 r_g_r 1123 points

I'm using the: D933MG Digital Metal Gear Servo

 r_g_r 1123 points

You can also Google for "HK450 Configurator" there you find the best matching parts for the HK450 kits.

 r_g_r 1123 points

Yes, I have it on my HK450GT and it works perfect. Just be sure to use a quick digital servo. You can use this gyro with analog servos but you need to change the settings according to the manual.

 abdulahad100 363 points

Yes its perfect for HK450GT

 Alexandre 26 points

You can't use knob for gyro gain. The Channel 5 switch is the upper right little switch.

 IanPellant 18 points

GA-250 arrived yesterday... took a few tries to crack the init sequence using the 9X transmitter! On the 9X set the Auxiliary Channel 5 to "GEAR" - that puts the gyro sens function (when plugged into CH5) onto the Gear switch (upper right as mentioned). To initialize: Turn on 9X, all switches OFF. Gyro should be mounted in a model(or held flat and steady). With gyro plugged in (black into CH4 and red into CH5)turn on the RX. Gyro will blink blue as it initializes. Flip the 9X Gear switch On, Off, On, Off, On and the blue light should keep blinking with the switch left On... wait a while to check that it keeps blinking, then turn Off the Gear switch and the red light should come on blinking for servo selection. For analog servos, the latest GA-250 has a 5 red blinks setting of 1520 / 70Hz - that should work with analog servos (I haven't tested it.. still waiting for the digital servos to arrive in the post).

 Alexandre 26 points

Hello, you must setup the gyro gain with the channel 5 oh the t9x (gear channel) and not with the gyro sense. More 50% you will be in headlock mode, under 50% you will be in standard mode. Finally you can set the gyro gain rapidly with the switch on your turnigy 9x.

 DigDug 60 points

The trick is to have the gain lower than 50 on the first position and higher than 50 on the second position of the gear switch. Then toggle the switch to get the gyro into setup mode. If the gains are both on 50, rapid toggle will do nothing.

 r_g_r 1123 points

Yes it will work for airplanes. But you need a spare channel on your transmitter to set the gain of the gyro. Because the gyro gain can only be defined from the transmitter. There is no dial to set the gain directly on the gyro.

 Alexandre 26 points

You can put this gyro on an airplane, but you must have a free channel for the gain.

 John 69 points

did you put it in setup mode? it says in the instruction manual how to program it and everything.

 SINGH09 7 points

i just installed the gyro on my heli and connected it to the Rx... but when i connect esc to battery its not responding.. i mean no flash or anything.. but with red plug in, blue LED blinks for 2 sec and than again nothing... :(

 France 26 points

ok you should have 3 leads coming of the gyro. the red plug is your gain and that should go to channel 5. the black goes to channel 4. and your rudder servo get connected to the mape servo plug. just sounds like you don't have your wires connected correctly. try that and see. also before you plug your tail servo you need the choose the correct frequency. this is all explained in the manual. hope this helps

 SINGH09 7 points

no no.. i plugged the wires to the right channels black to 4 and red one to CH5 (servo unpluggd) but on powering up, its just the blue light fast flashing for about 2 sec.. and then the light goes.. red light is not even coming.. M using a FS CT6B Tx.. it doesnt have a gyro toggle switch... does it matter???

 France 26 points

yes it does. the way to program the gyro is by toggling between heading hold and rate mode :( using your tx. Not familiar with this radio but I don't think you can with this radio since you can't adjust the gyro gain through your tx.

 SINGH09 7 points

My Tx is same as HobbyKing's:(HK-T6A-M2)It has a Gyro gain switch, its not actually a switch but a rotatable knob on the upper right side of Tx.. Can anything be done with that?? :p

 France 26 points

Maybe try turning the nob real fast back and forth when you initialize the gyro? I would look at your tx manual and if it says anything below 50% on the nob is rate mode and anything above is heading hold mode. Just a shot in the dark here though as I'm not familiar with the radio. sorry

 SINGH09 7 points

yeah! just see if you can do smthing with that... thanx fr the support man.. :)

 abdulahad100 363 points

For some reason HobbyKing has removed all files from the files section. To find the manual google "Assan GA-250 Manual".

 Liteson 27 points

Hi, why using 2 or more heli gyro's? For only 15 bucks you get a 3 axis stabilizer(OrangeRX RX3S) which suits perfect for fixed wings...

 alfonsoirwin 34 points

Hi la mouette. I'm trying to install this giro on a Losi TLR 22 rc buggy, with a M11 4 channels radio... and I can't adjust the End Point, or Dual Rate.. It works, but I only have like 20% os steering travel.. Any idea of how to enter the setting mode with a car radio? thanks.

 la mouette 140 points

For use in karting, I removed the gyro Assan to plug it into a normal radio with a digital servo. Following the instructions Assan, I parametered gyro for maximum travel left / right and in the right direction. Then I replaced the gyro to the servo with a ordinary karting, and it is perfect. By cons, my radio with steering wheel does not control runs on the third track ... So the gyro is still setting up! It still works, but at high speed in a straight line ... karting waves ... I did not find trick to limit the output of this third way ...

 alfonsoirwin 34 points

Thanks la mouette.. I think i got it.. I'm gonna try that and I let you know.. thanks again for your help and your early response.

 Kyran 1 points

It is my understanding that "head lock" and "tail lock" gyros are the exact same thing. Just some brands prefer to call it one or the other. Locking the tail of the heli will lock the head too.

 France 26 points

Yes, this gyro has both heading hold and rate mode depending on your transmitter you can set (usually channel 5) switch to toggle between hh or rate mode. which you will need to do anyways to set the parameters of this gyro. hope this helps