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Esprit Model . Thunder Power RC . Mikado Modellhubschrauber

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Miniature Aircraft Nitro/Gas Helicopters > gy 401 gyro
 
 
skyraider42
Senior Heliman
Location: Huntington,WV.

I just finished my new fury expert got a YS .61 eng and gy401 gyro I am having trouble getting the gyro setup. Do i ues any revolution mixing on any flight mode idl up1 or 2 or do you just use the gyro
03-08-2002 Over year old.
 
 
1UP
Key Veteran
Location: Claymont DE.

if you are just going to use it in h.h. like i do, than no mix at all !!!
james

JAMES
member of the HOT GIRLS thread
If it's worth doing, then it's worth over doing
03-08-2002 Over year old.
 
 
skyraider42
Senior Heliman
Location: Huntington,WV.

gy 401 gyro

Do you use revo or tail rotor pitch curve on your idl up 1 or 2
03-08-2002 Over year old.
 
 
miataguy
Veteran
Location: Santa Barbara, CA

James is right. Do not use any revo mixing or tail pitch setup.
Just assign the gyro to the gear channel and adjust the ATVs.
See www.helibuf.com for some useful setup info.

Official RunRyder Googlewhacker!
03-08-2002 Over year old.
HOMEPAGE  
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

If your in heading hold/lock mode, no tail mixes
or compensation AT ALL. If you put the gyro
into Normal mode (LED OFF), then you
do all the mixing you may be used to using.
03-08-2002 Over year old.
HOMEPAGE  
 
 
vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

The 401 is good enough to not have to use any Revo in any channel.
If you do want to use Revo then only use it in non-HH mode and keep the gain turned down fairly low (less than 30%).

I'm figuring that this setup would let the heli weather-vane more easily in flight.

My 401's hold my heli's on full power climb outs and decents with only 60% gain in non-HH mode.


Nolan Manley
RREMODELS, KBDD, Magnum Fuel
Stratus, ODIN, K3D, ATOM500, Outrage550, 700N, Vibe.
03-08-2002 Over year old.
 
 
1UP
Key Veteran
Location: Claymont DE.

i fond if the servo arm is to short, the gyro will not hold on fast assent
i keep my at 12mm out frome center or better!!! this drove me nuts till one day i put on a longer arm on my servo, and wa-la,, no driff !!!
just thort i add that
james

JAMES
member of the HOT GIRLS thread
If it's worth doing, then it's worth over doing
03-08-2002 Over year old.
 
 
skyraider42
Senior Heliman
Location: Huntington,WV.

gy 401 gyro

so don't use any revo or tail pitch mixing at all not even for 3dflying
03-08-2002 Over year old.
 
 
helitroll
Senior Heliman
Location: Southlake, TX

GY401

I run the 401 on 3 different helis. I use NO Revo mix in any mode to include normal with normal throttle and -4 to +10 deg,
Stunt 1 - heading hold with -6 to +10 deg and partial V curve.
Stunt 2 - heading hold with -10 to +10 deg and V curve for 3D.

I do not need Revo mixing on my Fury, Freya or Scaedu 50.

Rule 1. Take out all Revo
Rule 2. Take out all trim and sub trim in all modes.
Rule 3. Move the servo on the tail boom until it hovers hands off in normal mode at your desired RPM (1700 -1750 for me).
Then you can simply go to heading hold and adjust your gains. Try starting with 20 and 80.

Make sure you have the transmitter in HH when you turn on the reciever. If the led is flashing, the gyro is not working correctly. Good luck.
03-08-2002 Over year old.
 
 
heliman41
Key Veteran
Location: Valparaiso IN. USA

Skyraider42, start your heli in non-HH mode so that the rudd servo wont creep and stall out on you while its sitting on the ground. Then, after its started sw to HH mode on the ground or in the air while hovering and then fly as usual. You dont need any revo just starting or hovering the heli. You only need revo for non-HH fast assents and decents. If you want to fly around in non HH mode then in that particular idleup yes revo must be used unless you want to do all the corrections yourself on the rudd which you can do but requires a lot of concentration and really isnt necessary these days anymore.
03-08-2002 Over year old.
 
 
tim628
Heliman
Location: Cincinnati, OH

Start it in AVCS

Actually the manual says to start the gyro IN AVCS (HH) if I am not mistaken. I dont have it right here, but I remember thinking that was different than my Telebee. I checked Helibuf's page and he had the same thing written there so I am almost 100% sure that is correct.

I guess that the downside of the 401 being so easy to set up is that you dont need to read the manual at all - nice unless you miss the part about turning it on in HH.
03-08-2002 Over year old.
 
 
mfendley
Senior Heliman
Location: Saint Marys, GA

Yes, but the red flashing led ought to clue you in that something not right.....
03-08-2002 Over year old.
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

the 401 requires being initialized in HH mode.

That is when it memorizes the pulse width
that it thinks is 'neutral'. The 5xx and 6xx gyros
allow either N or HH startup since they remember what was neutral from the last time.

Depending on how much you move the machine between end of initialization and getting ready
to fly, you can certainly get the servo to go to
the programmed limit.

The machine knows its moving (yaw) and it knows its not commanding it so it starts drving
the servo to null it out.
03-08-2002 Over year old.
HOMEPAGE  
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

David,

You and I are on the same page here.

The only time I've seen the limit overdriven
is when using a JR servo w/ a Fut. gyro.
Sometimes the servo will init hard over.

However, given that the limit is correctly set,
it has been my experience that by the time
I have walked the machine out to the takeoff
pad from the start position, the tail is at full deflection (not binding).
03-08-2002 Over year old.
HOMEPAGE  
 
 
skyraider42
Senior Heliman
Location: Huntington,WV.

gy 401 gyro

I need some help with this gyro I can't get it to work. I have no tail rotor mixing at all. The proublem i s the tail keeps hunting and I can't get to stop
03-10-2002 Over year old.
 
 
skyraider42
Senior Heliman
Location: Huntington,WV.

gy 401 gyro

I use a 20mm arm gain is 90% set at radio gyro is mounted on front with 2 sided tape
03-11-2002 Over year old.
 
 
1UP
Key Veteran
Location: Claymont DE.

first thing i do is bring in the servo arm 1 hole !!! you can go down to 75% and still have a good hold !! but try first reducing the servo arm !!
i got my 60 heli at only 12mm at 95% and working grate !!!
james
ps the servo horn length plays a big part in the setup !!!

JAMES
member of the HOT GIRLS thread
If it's worth doing, then it's worth over doing
03-11-2002 Over year old.
 
 
Dr.Ben
Elite Veteran
Location: Richmond, VA, USA

Uh huh.

Too much gain and too much servo arm. The CSM's liked long arms like that, but Futaba products are going to want to well below any 20mm. The 15 or 12.5mm radius on a Futaba wheel are a good places to start.

When you've changed out the servo arm, reduce your gain down to 60% or so. It will still hold the tail fine, and you can work your way up from there to find the threshold for hunting. A high speed servo with HH gyro that is hunting hard in hover is pretty stressful to the model.

Ben
03-11-2002 Over year old.
 
 
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