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> Helicopters & Parts > Gyro & Stabilization > Tail Gyro


Hobby King 401B AVCS Digital Head Lock Gyro

Hobby King 401B AVCS Digital Head Lock Gyro

The now famous HK401B is known to have the same characteristics as the Futaba GY401. In fact we guarantee you wont know the difference!
No tail drift, excellent hold characteristics and a level of reliability only found in $100+ gyros.
Dont risk your heli with other cheap Gyros when the HK401B has been proven by thousands of pilots to be stable and accurate in a variety of temperatures and helicopters.
Compatible with both Digital and Analog systems
Minimizes rudder trim changes caused by wind, other meteorological changes, and varieties of helicopter attitude changes are automatically cancelled.
Sensor vibration proofing
Simple sensitivity adjustment
Digital proportional RIC system
Operating voltage: 4.8V ~6V( common for receiver)
Operating temperature: -lOL r-.rf-45 C
Dimensions: 28x26x20 mm
Operating current: 80mA

IMPORTANT: Make sure you isolate your Gyro from vibration. Use double sided foam tape and never use cable ties. Vibration will cause harm to the Gyro and degrade performance.
Manual found in the files section below.


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Weight: 27g
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Price  $11.99

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 Customer rated
Total of 535 discussions.
Yavor  3 points - 1/6/2015
Can i use this on a car?
 Fourmyves 35 points
Yes you can, I tried with a GP750 but this one should work
lawrence  5 points - 12/7/2014
hk 401 b will this work on a model airplane
 1stAidan 186 points
Yes, but with only one control surface.
Jack  1 points - 11/9/2014
do you have the manual of this HK401B?
 amastron 34 points
Jack, the manual can be downloaded from the 'Files' tab above. That's where I found it. Hope that helps you out.
 r_g_r 1341 points
Just look in the "FILES" tab above. There you can download the manual.
amastron  34 points - 11/2/2014
This has a Yellow wire on the end that goes to the RX ch 3, just a single yellow wire. Where do I plug this wire in at? I have no clue but I'm sure it goes to something. As with all Hobby King stuff it came without anything, even paper work! Thanks...
 amastron 34 points
I figured it out. Please excuse my dumbness, I'm a new guy so what do you expect!
 Doobieman 1351 points
Don't be so hard on yourself. I'm glad you figured it out on your own. Good for you.
 amastron 34 points
Thanks for the reply Doobieman, seems I'm learning allot with this 450 V.2 as I go. Just think, it may even fly one day when I'm all done, who knows! Credit given also.
 Doobieman 1351 points
Thank you. I gave you a thumbs up, as well. Too many people that come here don't even try, but you? Well, you succeeded on your own. Kudos, my friend. You're my kind of people.
Nornironguy  20 points - 10/6/2014
Hi there gabsterino I would try this product for what you require. 9171000238 Regards Stephen.
Customer Reviews
Review Blogs for this item
gyro used for Esky HB King 3
Fly less, spend more.
Overall Rating
143 thumbs up!
Ensure you do the fix for this gyro. This is a pretty decent gyro at this price... HK Rocks.

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Overall Rating
68 thumbs up!
IMPORTANT 2-minute fix for this gyro: ("" slash "hk401fix")

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Overall Rating
17 thumbs up!
The gyro is amazing. I used it in the road car model to manage and everything is in perfect order. I recommend this product for its sensitivity and price.

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Overall Rating

13 thumbs up!
i figured for the price i couldnt resist trying one of these and i am not dissapointed this things works great just as good as my 401 futaba gyro you need to look at the mods section on this as i had to do that but the little time i spent doing the mod was more then made up for with the low price and great performance

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Overall Rating
12 thumbs up!
I bought this gyro to try out for HK 450 it does very well ,hold the tail is solid with JR servo DS290G, First I received, inside board was sloppy & I try on heli it doesn't work, then I Open in back gyro I sim double tape to hold them inplace worked very well fly good,good for $ too

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