gy401 setup guide for the 400 needed

[MaXThReAT]

I'm thinking 30%. I would think it would give a good indication of what mechanical setup is needed and getting the best center. If I set it to high like 1-25% the gyro will just be correcting for the mechanical out of wackedness, right?

[sokal]

not sure thats the way i set mine when below 50% it really does no correction
u do it so that the servo will center
while in hh mode the servo doesnt return to center

i also used the slick floor method

[MaXThReAT]

Well Hmmm. I just tested and with 28% the nose turns to the left at full HS. The center the servo is set to now provides some pitch on the rudder. Don't I want a good hold with full HS in rate mode...so there will be a small amount of pitch to the rudder to counter the headspin? Or do I just want zero pitch?

[sokal]

dont go buy the pitch in the blades but center the slider between the tail and the tail grips
thier will be some pitch in the blades for anti torque reasons

dont use trim or subtrim adj only by the rod unless your servo is independantly mounted then slide that to adj

once u have the servo center and move properly set to hh and hover should not drift
i once thought i had to hover out of hh to get it set but u dont
put on a slick floor iddle 2 50% in hh if its seems to be drifting then adj with rod

[LockMD]

I'm thinking 30%. I would think it would give a good indication of what mechanical setup is needed and getting the best center. If I set it to high like 1-25% the gyro will just be correcting for the mechanical out of wackedness, right?



I'm setting mine up too, thanks sokal for all the help!

Max, with 0-50 being rate and 50-100 HH I'm testing with 25% (50%rate) and 75% (50% HH) does that make sense?


anyways back to my testing/setup...............

[MaXThReAT]

i was told to do hovering in rate
and was told didnt have to
all i did was make slider center in std rate mode then
do the switch flip thing
also test on a slick floor or a lazy susan
as for me i used 0 sub and 0 trim made all adj from rod
i recomend using the 3400g over stock stronger and faster
my stock seemed not to work to well

Your statement here kinda made me waist allot of time. I believe I now understand how the 401 works. The only rod and mechanical adjustments that should be made are to make sure you servo provides 0 pitch @ 90degree servo arm and has full throw in each direction. I started to adj my rod to stop the left Yaw in rate mode, all this did was throw off the center and make it bind on one side.
If you’re using the stock servo no mechanical adjustments should be needed unless it wasn't centered from the factory just a limit adj on the 401 to stop binding might be needed..
Once the servo/rod/pitch is adjusted so at Tx center no trim, there is zero pitch and the tail is able to move equal amounts in each direction, then you hover.
Hover in rate mode and adj USING the TRIM or SUB TRIM. Then after it's holding the tail flip the switch between rate and HH 3 times landing on HH. The GY401 memorizes this as center.
This way the servo can still have full throw left and right. True center (0 pitch is still center) the 401 just knows the new center as center to counter the HS torque but you keep full throw and range of pitch on the tail. Hope this helps and saves others time.
Let me know if I'm wrong but this makes complete sense to me.

[sokal]

what i said was true thier has to be pitch in the tail blades it provides anti torque for the rotor system
so mechanical center is the slider center on the shaft not 0 pitch in blades

in every tail rotor type helicopers weather it be ful scale or mini
please dont be offended by what iv said
iv work and crew full scale helicopters UH-1 and ch-47
if the tail pitch was 0 the body of the heli would rotate in to the direction of blade rotation
even if u watch fineless vid he also says center the slider not the pitch in blades
but hey just wanted to help im sorry if u feel it didnt help

[MaXThReAT]

Well maybe I did something wrong. The Blade 400 doesn't have a long tail throw, say a centered 0 pitch tail has 12 degrees of tail pitch in each direction and is limited by the GY401 so not to bind on either side. On the blade 400 the only mechanical adjustment that I know of is the push rod. So you shorten the push rod to counter the HS torque. It works but the servo now binds on one side so more limit is needed. Then a shorter pushrod then more limit. I ended up with maybe 8 degrees of pitch and the limit pot turned full. By moving the servo or push rod are you not just moving the center of throw for the servo/pitch? When it's memorized by the GY401 you still get max throw and 12 degrees of pitch in each direction.

[sokal]

after u plug btt in and init in hh mode
put in rate mode
now center the serv arm
then center the tail slider
then move rudd stick left adj limit so the slider backs off the adj so it bearly touches
now rudd in put both sides should not bind either way
should have the same amount of space on either side
delay should be 0
if using 3400 or 9250 or the spectrum should be in ds mode
now do the 3 switch thing to save center

my limit is about 85-90
my gain is 70

this is the steps i used worked for me and 2 others
ive helped people on msn messanger
if you would like me to do so pm me very willing to help

[LockMD]

this is the steps i used worked for me and 2 others
ive helped people on msn messanger
if you would like me to do so pm me very willing to help

I'm one of them these steps DO work, what threw me on setting up center (I was always binding no matter what setting the limit dial was on) You HAVE TO hold your rudder one way or the other while holding it right or left adjust your limit til it backs off a hair now release rudder and go the opposite direction should be the same. If not, then your slider is not at a true center point re-adjust the rod and repeat above.

[sokal]

thanks MD i thought i missed something

[magoo91h]

Ok, I installed the GY401 today. The main problem I am having is that the stearing is in reverse. I went into the "Reverse" menu on the tx and changed it, but no change takes place. How do you correct this?

Also, do you have to do anything in standard mode? Can you just use HH mode?

thanks

[LockMD]

Ok, I installed the GY401 today. The main problem I am having is that the stearing is in reverse. I went into the "Reverse" menu on the tx and changed it, but no change takes place. How do you correct this?

Also, do you have to do anything in standard mode? Can you just use HH mode?

thanks


Do you mean rudder or aileron? rudder - you can switch it on the gyro itself aileron, I had to go into the swashmix menu and change the - number to a + number like -75 to +75

Standard mode is just to set up, once set you'll stay in HH the rest of the time unless you need to tweek something.

[JohnAu]

Hi, when i ajust centre mechanicaly on my slider it gives me some pitch but in the wrong direction to counter the torque of the blades . So i have to have my slider adusted so it is not in the centre mechanicaly. this is differant to what you are saying on here. This is really bugging me lol. Could my tail blade grips be set wrong or something like that.

Thankyou.
JohnAu.

[sokal]

your tail should rotate counter clock wise
leading edge of the blades are controled

[JohnAu]

Hi sokal, when i look at my heli from the tail guard side it rotates clockwise like in the pic on the box. So i assume it is right, is this correct.

JohnAu

[LockMD]

Hi sokal, when i look at my heli from the tail guard side it rotates clockwise like in the pic on the box. So i assume it is right, is this correct.

JohnAu


Clockwise/Counter-clockwise could get confusing......it should spin up into the wash of the main blades. From the front it would hit your chin-nose-forehead viewing from the tail it would hit you in the forehead-nose-chin.

[JohnAu]

Hi LockMD, well its going in the right direction then. What way will the heli tail move with torque from main blades?.

[LockMD]

Hi LockMD, well its going in the right direction then. What way will the heli tail move with torque from main blades?.


With a proper set up it should not sway.....what helped me was a higher head speed. All was fine until coming down from a punch out and the tail would sway and the whole heli would go side to side (no control) higher head speed and now I have full control. Play with it until you find what works for you.

[Wolfpackin]

From the front it would hit your chin-nose-forehead viewing from the tail it would hit you in the forehead-nose-chin.:shock:

:rolling

[Wolfpackin]

The body of the heli would rotate in the opposite direction of the main rotors if the tail didn't have any blades.

Looking down on the heli the main rotors rotate CW, the heli would spin CCW if not for the tail rotor.

[JohnAu]

Thanks for thats guys, being new to setting things up i get myself all worked up and think its all wrong when its actually setup correct. I still love all the setting up and learning by trial and error lol.

Thanks JohnAu.

[tob27]

I have a blade 400 with new JRDS285 Mg servos for the head.

I want to upgrade to the GY401 gyro with a DS8900G tail servo.

Is that a good combo and will it be tricky to set up?

[sokal]

I have a blade 400 with new JRDS285 Mg servos for the head.

I want to upgrade to the GY401 gyro with a DS8900G tail servo.

Is that a good combo and will it be tricky to set up?
acualy it kinda easy and still can be tricky
all based on your heli
but the combo works great
most the vid you see hear is with that combo

iv mad a vid to aid the install look up top in main b400 forums