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HelicopterRadio - Servo - Gyro - Gov - Batt › How hard can I push a GY401?
03-20-2009 12:12 AM  8 years agoPost 1
enahs

rrKey Veteran

Rapid City, SD

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I haven't been out at all this year due to weather and school, but I've been working on a lot of fast backward flying and extended tailslides on the sim this winter. How much can I reasonably expect the 401 to hold up to this type of flying when I start doing it with my actual heli? I've got the 401 with a 9254 on a Trex 600N with 95mm Radix blades. My next purchase for this heli will be an upgraded gyro, but I cannot afford when at the moment.

---------
Shane

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03-20-2009 12:24 AM  8 years agoPost 2
cstoneman

rrApprentice

Colorado

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They hold good for me in that type maneuver.

When you start adding yaw in tight maneuvers, you may have issues. Usualy it is my fault if the tail blows out.

You also don't want to let the headspeed drop too low in a tail slide.

The 401 has been good to me. I am pretty sure there are better gyros, but you have to admit that for it's age the 401 is a damn good gyro.

I will be trying a mini-g on the new Rave 4S. That will be fun.

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03-20-2009 12:37 AM  8 years agoPost 3
canbarelyhover

rrVeteran

Sunnyvale, CA

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401 can be pushed pretty hard...

but that's if you know the manuevers beforehand and already smooth on the collective. if you're learning a new fast backwards move, the last thing you want is to have the tail blow out and lose orientation if you accidently get sloppy with the collective. if you're getting into that stuff, i recommend upgrading to a spartan or mini-g.

Citizen #830

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03-20-2009 01:12 AM  8 years agoPost 4
Ray Fernandez

rrElite Veteran

Guam (U.S.A.)

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It has been my experience that the GY401 can take alot of "abuse", however, as James mentioned, if you are going to be doing hard-core 3D, I'd recommend switching o a better gyro (Spartan, "G" or GY611)

Ray Fernandez - GUAM

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03-20-2009 03:55 AM  8 years agoPost 5
David Blain

rrKey Veteran

Mt. Dora, Florida​(USA)

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enahs-
I am still running a 401 on one of my Raptor Titan 50's,
(600mm mains,95mm tails, Gain is set loose at 68 in HH)
when you get into the fast backward moves MAN watch the collective and Yaw rate, I have blown mine all sorts of out of shape/control due to a bad move on the sticks. Now without knowing your flying ability you may be able to keep it dialed in...
It will hold with a good collective/cyclic managment but man when it goes bad it goes bad fast..
It will keep the "pucker recovery factor" tight!
If you can fly the as good as you describe on the sim on the helo you may want to consider the upgrade or holding off on sick fast backwards flying moves.
Other than that the GY401 is a true workhorse that will never let you down, Keep the gain low to save the servo and beat on it, It likes it and will come back again and again....

David Blain
T.O.R.C.H.S. Orlando Member

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03-20-2009 04:14 AM  8 years agoPost 6
enahs

rrKey Veteran

Rapid City, SD

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Thanks for the replies. I'll probably try some things out with a bit of altitude until I get the hang of how it responds to my collective management. I hope to have a new gyro within the next few months though.

---------
Shane

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03-20-2009 08:06 AM  8 years agoPost 7
Tail_BoomStrike

rrKey Veteran

N.A.

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There's video here of Lukas Riva "hotdogging" 600N with 401......

http://www.runryder.com/helicopter/...ight=lukas+riva

It could handle fast backwards I'm sure of that, even fast backward inverted hurricane....... But the set up have to be really good.....

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03-21-2009 01:21 AM  8 years agoPost 8
asm

rrVeteran

California

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You guys must all be better pilot then me. I tried tail slide several times on 401 and without fail, the tail always blows out even with no cyclic and 0* collective input.

My 450 would go into vertical tail slide about 20 feet and as the speed picks up, there goes the tail.

B

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03-21-2009 10:46 PM  8 years agoPost 9
Raptor Pilot

rrVeteran

Northern Ireland U.K

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When you can out fly the limits of a 401 then you must be special. I have a long long way to go yet!

If it doesnt move and its meant too... use WD 40. If it moves and its not meant too...use duct tape!

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03-27-2009 10:03 AM  8 years agoPost 10
mchammer

rrElite Veteran

California,USA

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IMHO, the 9254 is the weak link. If you use a good servo it will hold alot better. It will still be no 611 or ds760 but will be noticibly better.

I would get a jr 8900g servo and when you outgrow the 401 you can get a spartan 760 and you can still use your 8900g servo with it.

Peace Through Superior Firepower!!!

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03-27-2009 12:06 PM  8 years agoPost 11
helidevil

rrElite Veteran

Brunswick, ME

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i fly a blade 400 and i noticed that in a tailslide, every now and then, it kinda drifts to the rite. even if its setup perfectally! but for the things im doing, i need a 520. the piro on the 401 is horibal compaired to other top end gyros!

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03-28-2009 03:27 AM  8 years agoPost 12
mchammer

rrElite Veteran

California,USA

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the piro on the 401 is horibal compaired to other top end gyros!
The 401 is not a top end gyro. wasnt suposed to be.

Not realy fair to compare it with them. It is also half the price.

Peace Through Superior Firepower!!!

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03-28-2009 03:39 AM  8 years agoPost 13
MAXHSHV

rrKey Veteran

,mn usa

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as raptor pilot said if your finding the limits of the 401 you must be good.I think untill you start doing alot of fancey piro stuff the 401 fills the bill just fine.
I can't speek for a 450 but on all my 500's 550's, 600's and even my t700 i can tail slide all day long without it blowing out.the only time it blows out is in extreme fast backwards flight if you let the tail get a little sideways.

However i have a520 on the way, I'm curoius to see just how much better it can be.I think I'm going to need to improve my flying alot before I'll see alot of difference.

Century heli rep. To much power is never enough.

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03-28-2009 12:33 PM  8 years agoPost 14
helidevil

rrElite Veteran

Brunswick, ME

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the only time it blows out is in extreme fast backwards flight if you let the tail get a little sideways.
exactally! thats the part i dont like about it. other then that, its fine

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03-29-2009 08:58 AM  8 years agoPost 15
mchammer

rrElite Veteran

California,USA

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^^^^that improves alot with a better servo.

Peace Through Superior Firepower!!!

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03-29-2009 02:04 PM  8 years agoPost 16
helidevil

rrElite Veteran

Brunswick, ME

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is a 9650 not good enough?

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03-29-2009 02:07 PM  8 years agoPost 17
nivlek

rrProfessor

Norfolk England

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is a 9650 not good enough
It's not really quick enough to be a really good tail servo .

At the end of the day , it gets dark .

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03-29-2009 02:07 PM  8 years agoPost 18
helidevil

rrElite Veteran

Brunswick, ME

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well then which one is?

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03-29-2009 02:26 PM  8 years agoPost 19
nivlek

rrProfessor

Norfolk England

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Anything under 0.9S/60 degrees at 4.8V would do .

Here's a couple of budget options :

http://www.amainhobbies.com/product...oducts_id/27086

http://www.amainhobbies.com/product...oducts_id/27089

At the end of the day , it gets dark .

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03-29-2009 02:28 PM  8 years agoPost 20
nivlek

rrProfessor

Norfolk England

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Or a JR servo intended for the job :

http://www.jrradios.com/Products/De...ProdID=JRPS290G

At the end of the day , it gets dark .

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HelicopterRadio - Servo - Gyro - Gov - Batt › How hard can I push a GY401?
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