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A Main Hobbies . Boca Bearings . Modefo's RC Helicopters

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RJX Hobby Hurrican 50 - Xtreme 50 > servo problems (NOW SOLVED) I think.
 
 
Rockohaulic
Elite Veteran
Location: Valencia, CA, USA, 3rd Rock from the Sun

Engine goes into reverse - a sign it is too rich. Or that the clutch is grabbing when idling.

On Mandy's Hurrican the clutch was grabbing, and 2 weekends ago in Palmdale it went into reverse. I removed the clutch bell and sanded down the liner. Doesn't grab as much now.

I got a helicopter for my girlfriend,
It was a good trade!
12-05-2007 05:28 PM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

Just put in 2.4 radio gear, no change, same problem happenning, managed to land just in the nick of time, but could see one of the aileron servos twitching the swash from side to side.
2 years f assing with these nitros now, first calibre 30 and now this one, the first few months I had a trex 450 was the only few months i actualy got to enjoy flying helis out of the whole time, all ive ever done since is test em to see if there working yet, but its allways something withem, all the other helis ive set up for other people over all this time are going great, really sux.
12-07-2007 04:02 AM
 
 
ammo
Senior Heliman
Location: Singapore

I have had the same problem before, turns out my servos are showing signs of dying

I changed them out and it's flying great now
12-07-2007 04:09 AM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

dont know why but i really do think that its one or more of the servos, im going to try that now.
12-07-2007 05:07 AM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

Does anybody know if there is a way to test to see if servos are dyeing or will I need to just buy new all new ones?
I wonder if i can get away with just 3 for the ccpm to save bucks
12-07-2007 05:19 AM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

Ammo...

hi this is spitfire (jason) just wonderin, when your servos where dyeing did they twitch or move all the time, or did the problem only occur when the helicopter was running, this is what is the case with my one, I think I could be on to something here.
12-07-2007 05:30 AM
 
 
SteveH
rrProfessor
Location: Texas

Spitfire1,

One of the things that goes bad on servos over time and use is the potentiometer (pot), and the symtem will be a jittering, most likely in one area of it's movement, and also most likely, worse under vibration such as when the engine is running. You can get the pots replaced at the service center for the radio you are using, but personally, I would only do it with servos that were first expensive, and known to be low flight time.

SteveH
Magnum Fuel
AMA76186
12-07-2007 12:53 PM
 
 
ammo
Senior Heliman
Location: Singapore

Yoz Jason,

I first noticed mine when it was behaving very oddly in flight, kinda couldn't hold it's position properly, rather i can't even hold a good hover with it. Then i noticed some twitching on the ground when I start the engine for my next flights, immediately that scared the S**T out of me. I was still wondering if my receiver or transmitter was going bad.

Until I hold some pressure against the acting up servo, it shudders at relatively high frequency rather than just buzz and resist. That's it..... Pots are gone i suppose... new servos are next
12-07-2007 04:54 PM
 
 
Jag001
Heliman
Location: australia

Spitfire,

where in Perth are you located and do you fly with any of the clubs?

As for testing your servos to see if they are beginning to fail, yes there are a couple of ways. Firstly there is a servo tester that you can use (depending on brand) Which will normally show up servo problems.

As others suggest normally it is the Potentiometer that fails, which results in jittery operation either in the central position or when the servo is deflected to a new position and held.

One way of checking if it is the pot causing this is when you have the receiver powered up and the servo is sitting in the neutral position it should be quiet with now audible buzzing coming from it nor any signs of movement. If you place "Light" pressure on the servo arm with you finger gently trying to move the servo arm from it's rest position it should resist you but be steady in doing so. I have found that a servo with a dodgy pot will get all jittery in this situation.

Lastly one jittery servo can set up interference in the other servos if their leads are close together, I have found that this type of interference is self propagating in so much that once it starts it gets worse and the worse it gets to more the other servos jitter, which leads to more interference and so it goes on.

Hope this helps a little.


Cheers,

Jeff

another oldie in Perth with the heli bug
12-07-2007 09:59 PM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

this does make sense.
we want to fly my dads heli tommorow, but then i will put all his servos in my heli and if it cures the problem i will buy new ones.
12-08-2007 05:24 AM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

we fly at wanneroo aero modellers, there isent many other helis up there though.
12-08-2007 05:25 AM
 
 
Jag001
Heliman
Location: australia

Spitfire,

G'day mate, did you try the finger pressure test on your servos?

I don't fly 2.4ghz but have had similiar problems even on pcm.

I have only ever been up to the Waneroo feild once, but you have a lovely venue there. If you cannot sort your problem out it might be worth a trip to another club to have a chat to other heli flyers.

I live in SwanView and fly at Armadale, however if you continue to have problems and cant get it sorted then perhaps we could get together sometime and see what we can both come up with, two heads are sometimes better than one.

cheers,

Jeff
12-08-2007 08:03 AM
 
 
helibuilder19
Heliman
Location: CT.

Topic name

this post when you first read the topic name(Possible static g10 hurrican50????) gives everyone the idea RjX is got a static problem. Seems like that is not the case after reading though all the post..... maybe the Topic Name should reflect "possible servo problem" to? IMO
12-08-2007 03:48 PM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

the servos seem fine when i hold them on the bench, could be anything, maybe something inside the wires, ive just put some other servos in, although there not new ones,see how it goes, I think I have to stop posting on this post or it keeps putting it to the top of the list, when I started I was just enquireing about the static cause i was reading one of the other posts about it, but I dont think thats the prob, ill try some more servos tommoroow, if this doesent work ill have some cheap hurrican parts for sale, actually a whole heli of em,think I might have just got unlucky with this particular hurrican, im thinking of one of them mdx 500 electrics, same size as a lepton, my rjx dealer toby has them and they look ok, if not ill just take the safe route and buy a trex 600 nitro, its a pitty because the one hurrican we have got flying is sweet to fly and they really do look nice aswell.
12-09-2007 02:56 AM
 
 
Foxden
Key Veteran
Location: Port Charlotte, FL. USA

Chris,

Is this a Hurrican or an Xtreme? We've been flying the Hurrican for over a year and have not had any problems with glitching, been flying a pair of Xtremes for a few months as well, we are running the XPS 2.4 system on all of them.

Clyde Fox
Port Charlotte FL
RJX of USA Field Rep
Team Rotorworkz
Morgan Fuel Rep
12-09-2007 03:46 AM
HOMEPAGE  
 
 
Jag001
Heliman
Location: australia

Spitfire,

I hope you manage to sort your problem out, have you had the machine back to Toby?

I must admit I have been seriously looking at the Hurricane Extreme as a replacement for my current 50 Heli. So if you can't get it sorted and are considering replacing it with something else, then let me know.


cheers,

Jeff
12-09-2007 07:25 AM
 
 
RjX of USA
Senior Heliman
Location: IL

Static

There as been no reports of a stacic problem in the USA from either the Hurrican or Xtreme 50 kits. This is a fact!

Rusty Howard rjxofusa@myway.com
12-09-2007 07:28 AM
 
 
Spanier13
Heliman
Location: Alicante ,Spain

Hello All,

just to clear some things.G10 can never have static problems as it is not conductive like carbon fiber.
All carbon fiber helis has to be build properly to avoid glitching problems.
When "G10 helis" have glitching is it mostly due the electronic equipment be "bad" or something "wrong" with bearings due a crash or just due the use.But never due the material of G10.

cheers
12-09-2007 02:30 PM
 
 
Spitfire1
Senior Heliman
Location: Perth Australia

problem solved! (touch wood)

my depression has finally been lifted at least momentarily, I swapped all three ccpm servos with some old ones i found, put three tanks through last night with no glitches, only other thing I changed was I had two servo extender wires running from the aile/pitch servos, I took them of and just managed to get the wires to reach the receiver without them (I have a hunch it was one of these extenders that was the prob).
All now is the where the ball link screws onto the metal plate that joins onto the rotor grip has come loose in the thread fix this and hopefuly will be ok to fly.
Has anyone found a good fix to this prob, I have used arldite as thread lock and also used lots of aroldite, but on both our helis these threads seem to wear loose quite quick causeing the tracking to go nuts, there those small plate things with the pitch adjusting ball joints, they attatch to the grip with three very very small screws.
12-11-2007 12:16 AM
 
 
Jag001
Heliman
Location: australia

Spitfire,

I am pleased for you that you have managed to solve your glitching problem, there is nothing more frustrating than having to chase down a glitch issue.

cheers,

Jeff
12-11-2007 12:19 PM
 
 
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RJX Hobby Hurrican 50 - Xtreme 50 > servo problems (NOW SOLVED) I think.
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