RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1767 views Post Reply
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Close call with my R90SE today!
07-19-2006 04:09 AM  14 years ago
Topic Vote0Post 1
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
Close call with my R90SE today!
I went to Parcs club today for some late afternoon flying. After a few hover checks, I flew a couple fig 8's,did some inverted hovering..inverted climb outs and one tail stand takeoff....then while hovering, I lost my left/right cyclic control for a couple of secs, then I got it back. The heli would start to roll right...then I would barely catch it. I landed asap, shut down, then worked the roll servo...it would move only sometimes...then after 15 secs of working the servo, it stopped moving completely. I just heard the gears spinning inside the servo case...when I moved the stick left or right. The servo is a new ACE 1111, only have 3 weeks on the servo. I swapped the servo with one from my freya, and flew 7 more tanks, without problem. Strangely also, today my 3 week old Tail rotor servo Futaba s9256...seemed stiff on the preflight. Normally, you can change the pitch on the T/R blades with your hands easily...which moves the T/R control rod and finaly the servo arm. I disconnected the control rod from the t/r servo...and when I rotate the arm with my fingers, it takes much more pressure to rotate it..feels smoothe...but like 'brakes' are applied internally on the servo. It also feels like the control rod is under great friction...but the rod works well...it's the servo arm that is much harder to turn than normal. When the receievr is turned on, the servo seems to work fine, however. I'm going to take the s9256 out tonight and put my s9254 from my freya. I'm using a GY611 gyro. Hoping Ace and futaba will replace?

Any thoughts/ideas??

Michael

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 04:28 AM  14 years ago
greg

rrKey Veteran

Yorkville, IL

MyPosts All Forum Topic
I don't think the 9254 will work with the 601/611. You may want to check with futaba before making the substitution.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-19-2006 04:43 AM  14 years ago
AzHyper

rrKey Veteran

Peoria, Az.

MyPosts All Forum Topic
You didn't just happen to change your battery/regulator did you? Have you checked the voltage at the receiver lately?
SHARE  PM  EMAIL  Attn:RR  Quote
07-19-2006 04:52 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
s9256/gy611
Greg,

Thanks for the info...

Michael
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 04:56 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
Voltage regulator
Cog,

The aircraft is new, haven't messed with regulator or checked Voltage at receiver. Using Duralite with regulator. The stiffness is noticed when power is off....but when on, seems to work ok. I'm wondering if the servo is working harder?

Michael
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 05:16 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
T/R servo...
Most servos have drag when you turn by hand, T/R servos usually rotate much easier..ie: easy enough to move the arm by moving the t/r blades by hand. Am I right in thinking the High speed T/R servos like the Futaba 9254...and the one in question s9256...rotate easily by hand...compared to the cyclic servos etc.

Michael
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 05:18 AM  14 years ago
greg

rrKey Veteran

Yorkville, IL

MyPosts All Forum Topic
Should be as smooth as butter. No resistance.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-19-2006 05:23 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
servo
Greg,

why are T/R servos easy to rotate by hand, compared to others?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 05:44 AM  14 years ago
greg

rrKey Veteran

Yorkville, IL

MyPosts All Forum Topic
Well, my 9252's rotate pretty smoothly but it does seem like my 9256 is a bit smoother. This is my educated guess, they probably put a better motor in the servo as it is usually a more expensive servo. Also, you are giving up torque for more speed and therefore the faster servo will have less splines which means less drag through a given degree of rotation. Like I said this is just a guess and I am sure the first person who knows for certain will quickly chime in and tell me why I am wrong.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-19-2006 11:04 AM  14 years ago
IAF

rrApprentice

Israel

MyPosts All Forum Topic
I think that the different gearing of T/R servo makes them easyer to rotate. Just think of a car with menual gear and engine off. It is hard to push the car when in low gear and easyer when in higher gear.Have a nice day :)
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-19-2006 12:11 PM  14 years ago
PaulJC

rrElite Veteran

Hertfordshire UK

MyPosts All Forum Topic
The smoothness is all down to the gearing in fast tail servos, i've got a s9251 which i though felt a bit strange at one point but its now got about 20 gals on it and is still going strongRe-entering the atmosphere...
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 12:14 PM  14 years ago
Kinger

rrElite Veteran

Granville, OH

MyPosts All Forum Topic
Turn the servo and then turn on the heli. Does the servo return to center quickly or is it slow?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 02:07 PM  14 years ago
SPB

rrElite Veteran

Athens - Greece

MyPosts All Forum Topic
Don't
put the 9254 on the 611. You'll fry it.

My 9256 turns with the wind. It's so smooth so there must be something wrong in yours. You better send it for repair. In a recent crash I had I stripped a plastic gear. I replaced it my self but still the movement was not the one I was used to. So I send it for repair. Tiny particles from the stripped gear were still inside.

So you better send it for repair. Don't push your luck with the tail servo.

Sotiris
myhelis.com Flying Team
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 02:31 PM  14 years ago
Eury

rrProfessor

Dover NH USA

MyPosts All Forum Topic
Assuming the 611 has the same menus as the 601, you can run a 9254 on it just fine. There is a service menu that you can access by holding down a couple buttons when you turn on the gyro, and you can set the servo mode to one that will work with any servo. I ran my 601 with a 9254 for a while when I had to send the stock one off for repair. Do a search, the instructions on how to do it are on RR somewhere, that's where I get them.Nick Crego

Citizen #0168
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2006 02:32 PM  14 years ago
Yug

rrMaster

UK. Herts

MyPosts All Forum Topic
If your 9256 is rear mounted, oil could have got into the motor which can make it stiff.
Sounds like your aileron servo pot has packed up.
Vegetable rights and Peace
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-20-2006 03:32 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
T/R servo...
Some interesting thoughts..hmmmmm I have been doing lots of inverted hovering, climbouts etc.......always gets oil on the servo. Perhaps some seals and/or gears have expanded from this?? I flew 8 tanks today and Tail worked fine.

Kinger...Yes, the servo centers quickly as normal. I'm stating to think it is oil...perhaps I should open the case and tak a peek. I think I'll order a new s9256...and when it get in, I'll swap it out and send stiff one back for repair. I'm thinking the battery may be draining more if it's stiff when moving by hand. As an idea of resistance, I just held a Qtip in the center and tried to move the servo arm....it bends the Qtip almost to the point of breaking, before it moves the T/R servo arm.

*Also going to make the servo oil proof in the future

Michael
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-20-2006 03:41 AM  14 years ago
Kinger

rrElite Veteran

Granville, OH

MyPosts All Forum Topic
Why not just move the tail servo up front? You do have the option of doing that with the R90SE and it gets the servo out of the exhaust stream.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-20-2006 04:34 AM  14 years ago
JAGNZ

rrProfessor

Auckland, New Zealand

MyPosts All Forum Topic
Yes tail mounted servos get oil on them but the reason I went to the QuickUK Tail Setup on my R50 was so that I didn't screw up my tail geometry every time I adjusted my tail belt via the boom. With the TT Frame Mounted Tail Servo Plate (as on the 90SE and Upgrade for the 50), there is no benefit whatsoever as it still screws the geometry. So, yes, he could yoink it and put it up front, OR get the QuickUK Kit for the tail of the 90SE. I just think the carbon tail kits/rods are sooooo much cleaner looking and keep you from having to install and look after the tail rod guides etc.

Now, as for the 9256 in question, yes, it should be like silk with no power to it, if not, it COULD indicate an impending failure...you are right to send it in.

Jason Greenwood

www.3dheli.co.nz
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-20-2006 02:07 PM  14 years ago
SPB

rrElite Veteran

Athens - Greece

MyPosts All Forum Topic
Tail servo mounted up in front for me. I prefer a less than perfect look for my tail (otherwise there is nothing wrong with the stock tail rod and the rod guides) than exposing my $100 worth servo in oil and dust and.
Sotiris
myhelis.com Flying Team
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-24-2006 05:20 AM  14 years ago
AH-1 pilot

rrKey Veteran

Tampa, Florida

MyPosts All Forum Topic
Tail servo
JAGNZ,

I use the shaft drive to the T/R...so I'm not adjusting boom as you need to with a belt.

Michael
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1767 views Post Reply
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Close call with my R90SE today!
Print TOPIC

 4  Topic Subscribe

Friday, June 18 - 4:13 pm - Copyright © 2000-2021 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online