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HelicopterCentury Radikal G20-30 N640 Hawk Predator › OPINIONS/SUGGESTIONS NEEDED: heli has a random​glitch
08-12-2007 01:19 AM  10 years agoPost 1
ZXXflyer

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stone mountain,​georgia, US

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OK guys don't kill me for posting this in the century forum, but yall have helped me out soo much in the past, and I have read several cases about glitches on the hawk and raven.... so here's what's up: Got a new random glitch on my Quick 60 Pro

I have hovered the 60 on three different occasions and it flew flawless. Yesterday when I was setting it down in the driveway, it developed a random glitch. It's a very fast glitch that isn't affecting my cyclic much, but shows up big on the throttle/pitch and tail. You can physically see the swash jump up and down. There is no glitch at idle, and the radio range checks properly. I have made NO changes to the heli from the previous flights. Today when I tried to give it a test flight at the field, the glitch was there again. I am getting bad glitching when spooling up, then it goes away, and the it comes back at hover, but not as bad.

So what do yall think??..... Am I looking at a possibly bad receiver or crystal? All of my servo wires and extensions are still flawless, no nicks. The only servo with metal gears is on the tail (S9203).

Everything I know tells me I have something metal loose that's causing RF interference whenever the engine rpm's make it vibrate.

I was hoping to get some good video of this thing in actoin for everybody, but I am now grounded till this gets solved or goes away.

Please let me know if you want/need any further info to help me out.
I have already looked the heli over and can't find any moving parts that are loose, so I will have to dig in tonight and look for a loose bolt or nut somewhere.....

I can take the time to undo the receiver and battery from my hawk pro, which flies flawless, and try them out in the quick.. If it acts normal on a different receiver then I know it has to be the receiver, crystal or, battery...

I think I will pull the crystal out the hawk first and try that... Then I could try the antenna from the hawk too(I run whip antennas).
Or could an antenna even cause glitches at close range?

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08-12-2007 01:28 AM  10 years agoPost 2
cassat

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Alberta,Canada

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noise

Probably noisy bearings. Check main mast first. I just removed a set
that didn't show until the mast was removed.

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08-12-2007 01:31 AM  10 years agoPost 3
ZXXflyer

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stone mountain,​georgia, US

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I am getting glitching as soon as I start to rev the motor(before the mains start to turn.. Could it still be them?

I have a bad feeling about the start shaft and the one way in the clutch... The start shaft had pitts/lines in it from indentations by the rollers in the one way bearing!! It makes a hars sound at idle while the clutch is disengaged, and th estart shaft still spins even after I remove the wand.

EDIT:
And when checking the mast/whatever bearings I am feeling for any notches/rough spots right?

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08-12-2007 06:48 AM  10 years agoPost 4
cyclic fever

rrApprentice

Seymour Indiana

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Is the Qwick 60 a belt driven tail heli? Larger belt tail helis can build a static charge that will discharge from the tail boom to the next best thing such as the tail servo.This cause all sorts of radio glitches. If you think this might be your problem there are two ways to fix it.

Conect the tailboom to the engine mount with a wire to give a path for the charge to disapate harmlessly,or I have used Pleadge or some other anti-static spray on the belt to prevent it all together. However I'm not sure of the long term effects of those products on the life of the belt.

Edit: I read in your last post that this problem starts even before the blades are moving too. Static discharge couldnt be the case then but just in case you didnt know

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08-12-2007 09:33 AM  10 years agoPost 5
Gearhead

rrMaster

Vt

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sorry I don't know the heli so I cant help you there,, but I can say I have come to find if the glitch only comes to be in the same orientation to where you are standing it is electronic, for instants if the glitch happens when your heli is only to the left of you but not in front of you or not to the right of you then it is electronic, I had a receiver that would only glitch when my heli was at my left (of-course this was at the field where there was a huge wide-open space),,, yet if I had a glitch at any time at the same stick placement then it is most likely mechanical, here I had a glitch but it only happen when the cyclic stick was in 2 different spots, here I found screws to be loose ..

Jim

Jim
Buzz Buzz Buzz

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08-12-2007 09:51 AM  10 years agoPost 6
ZXXflyer

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stone mountain,​georgia, US

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hmmm... i didn't know about the static thing, and yes it's a belt drive.

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08-12-2007 07:50 PM  10 years agoPost 7
FenderBean

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Clarksville, TN

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i ahve a problem on my falcon 50, tried all new bearings and it flew fine for 3 flights then, the glitch came back, it effect all my control surfaces and is constant I cant even get it off the ground. I have tried diff receiver, gyro, switch and new servos. If it wasnt so blinded out I would kick it to the kurb and get anew 600N pro

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08-12-2007 08:15 PM  10 years agoPost 8
Gearhead

rrMaster

Vt

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FenderBean,, you have changed everything, well check the bearing in your swash, or just replace the swash,, my last crash really messed-up my swash bearing , only 10 flights on it and it's useless eerrrrr

Jim

Jim
Buzz Buzz Buzz

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08-13-2007 12:04 AM  10 years agoPost 9
cyclic fever

rrApprentice

Seymour Indiana

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Sometimes we forget that the transmitter can also be the problem. I have a Futaba 8U that has never been mis-handled and one summer I had nothing but glitches in my helis. Drove me nuts trying to run all of them down. Finally I sent the TX to Radio South as a last hope and sure enough, they had to replace a damaged electronic component and its been glitch free ever since. Now, every winter they get my TX and sometimes a RX that had a crash to make sure everything is tuned up and working perfect.

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08-13-2007 03:46 AM  10 years agoPost 10
FenderBean

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Clarksville, TN

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eeww didnt even think about the swash plate lol

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08-13-2007 09:00 PM  10 years agoPost 11
Gearhead

rrMaster

Vt

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""eeww didnt even think about the swash plate""

don't feel bad, no one ever does..

Jim

Jim
Buzz Buzz Buzz

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08-14-2007 01:42 AM  10 years agoPost 12
cassat

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Alberta,Canada

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suspect

Yeah, so you suspect the main shaft or starter shaft bearings.
But you can't always feel them inside the heli until you remove them.
Pain in the A** I know.

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08-14-2007 01:49 AM  10 years agoPost 13
ZXXflyer

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stone mountain,​georgia, US

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The main shaft bearings felt PERFECT two weeks ago whe I had the heli apart to clean and re-assemble. All bearings have good grease packed in them.

The start shaft is my main suspect, and the one-way bearing should still be fine... but if not, I have another.

I have been given a tip to possibly buy a Raptor V1 start shaft and cut the lenght down, then file another slot for the set screw. They are supposed to be hardened shafts, unlike the QWW one.
I need to call nathan at rick's tomorrow and see.

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08-15-2007 12:13 AM  10 years agoPost 14
ZXXflyer

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stone mountain,​georgia, US

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UPDATE:

Today's further testing revealed that my receiver, antenna, and crystal are NOT the cause of the glitch.

The glitch was present during testing with both receivers. It then went away at the end of my tank. I hovered half a tank today while testing the receivers, and the last hover was eventless from spool up to landing.

I have checked EVERY bolt on the heli, and nothing is loose.
I can only believe it was caused by my start shaft, battery, or possible some bearings. The only bearing possible are the swash, mast, pinion, tail, and counter gear.

I also put some more fuel in the heli and flew again just to make sure the glitch was gone, and it flew fine.

I have video to upload for everybody to inspect... Shows the swash glitch pretty good, and you should be able to hear it in the throttle.

The only thing I can see different now, is that the hex start adapter has always slowly rotated at idle after starting the heli(and sounded horribly rough). It now spins at full idle engine rpm after removing the start wand, and sounds totally smooth till I put a finger on it and make it stop spinning...

I will have a new start shaft on the way tomorrow though!

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08-15-2007 02:13 AM  10 years agoPost 15
ZXXflyer

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stone mountain,​georgia, US

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08-28-2007 10:33 PM  10 years agoPost 16
ZXXflyer

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stone mountain,​georgia, US

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Got my glitch fixed!!
Just test flew it!
It was the bearings on the start shaft and clutch pinion.

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08-29-2007 02:56 AM  10 years agoPost 17
Furious Predator

rrProfessor

Kitchener, Ontario,​Canada

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glad to hear you got it fixed, stupid little things like that can be really discouraging.

Shawn
Team Leisure-Tech
Team HelixRC

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10-25-2007 03:59 AM  10 years agoPost 18
Blade_Master1

rrElite Veteran

Canada

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GO Spektrum
and never worry about glitch again

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10-25-2007 04:15 AM  10 years agoPost 19
Furious Predator

rrProfessor

Kitchener, Ontario,​Canada

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yeah, you just wait until your servo fails instead, or what ever else is causing the glitch.

Shawn
Team Leisure-Tech
Team HelixRC

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10-25-2007 04:26 AM  10 years agoPost 20
cassat

rrVeteran

Alberta,Canada

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Yeah Shawn,

Lots of glitches n witches getting ready for halloween.

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HelicopterCentury Radikal G20-30 N640 Hawk Predator › OPINIONS/SUGGESTIONS NEEDED: heli has a random​glitch
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