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HelicopterBeginners Corner › Glitch
09-06-2003 01:20 PM  14 years agoPost 1
Arthur Lee

rrNovice

Singapore

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Hi Guys, I own a rappy 30 V1, Airtronics RD 6000, GY 401 c/w 9253 combo and an os 32 sxh...today when I was flying...was doing a side hover at 45 degrees when suddenly the servos on my bird went haywire for a split second...I immediately thre both sticks into full corrective and cyclic..( I was hovering about four feet high ) in order to try save the bird...but to no avail...it went down sideways...had to replace the flybar...spindle...and main blades..kinda sucks...

I've checked all the wirings and such but cannot find any fault with it...what do you guys suggest I check next???? I was the only person flying at that time so there isn't a possibility of an interference from someone else...it was just a split second glitch...what should I do??

Thanks in advance to all the guys who are gonna reply..

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09-06-2003 02:57 PM  14 years agoPost 2
Greg McFadden

rrKey Veteran

Richland, WA

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check the reciever antenna for damage again. Also, check the switch (seen more than one of them that if you vibrate them just right the contact is intermittent). (personally, I like the http://www.fromeco.org switches).

Where do you fly? are you in the middle of a residential area where someone might live and be on your channel? (it really does sound like it might be a hit)

The silence often, of pure innocence persuades, when speaking fails

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09-07-2003 04:30 PM  14 years agoPost 3
Arthur Lee

rrNovice

Singapore

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Went for my flight today and all was well...I was a bit paranoid though...fearing another glitch...i was just wondering if the aligator clip on the remote glow plug extention could be the culprit??? what will happen if the clip touches the engine cooling fins???

Or could it just be the Airtronics RD 6000 I use????

Another question...I'm using power master 15% nitro on my bird...was wondering if it can conduct electricity if a certain part of the heli becomes too oily from the exhaust fumes, thus causing the glitch..

Thanks guys for the reply again

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09-07-2003 05:10 PM  14 years agoPost 4
crash-

rrVeteran

Ca

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Check the screws at the tail boom supports.
They could be loose.and your flight pack battery.

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09-07-2003 05:24 PM  14 years agoPost 5
Greg McFadden

rrKey Veteran

Richland, WA

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ahh, the remote glow... I had a sullivan remote glow adapter on my Sceadu... I had this random glitching which was driving me crazy trying to track down.. checked everything, then I had a thought to check that.. as soon as I removed the remote glow adapter, no more glitching.

Oils are typically not conductors (heck, they are used as insulators and dielectrics in some applications). So the oil is probably not conducting elecricity.

-Greg

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09-07-2003 05:31 PM  14 years agoPost 6
Arthur Lee

rrNovice

Singapore

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ah....so it could be the remote glow.....damn.....okie...will try it tomorrow and update you guys on the results...thanks for everything..

Another question for you guys...

What is the range of a typical set of RCs????I own one set of Hitec Eclispe 7 and one set of airtronics RD 6000 sports...

Thanks in advance!

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09-08-2003 12:23 AM  14 years agoPost 7
spiff71

rrNovice

Elyria Ohio

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Check the set screws that hold on the struts for the landing gear, just a odd one I had. And I think the range is around 6000 feet on most radios.

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09-15-2003 09:10 PM  14 years agoPost 8
Arthur Lee

rrNovice

Singapore

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Solved...possibly...

Was kinda gonna give up hope...was just taking out the head and hoping to check the main mast bearings...did so and put my finger to the bearings and turned...all's well...checked all the screws and stuff..including the switch and connections....all's well...then wanted to change the tail boom because I bought a blue tail boom which I really liked...started taking out the boom and I vaguely remembered some brothers here talking about screws rubbing agains the struts or boom...couldn't really remember...then I saw it....BINGO....scratches on the boom by two screws tightening the tail boom support to the horizontal fin....

I don't know if this is the fault but I added a couple of washers to solve the problem...will fly tomorrow and see if the glitches are still there...what do you guys reckon??

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09-15-2003 09:43 PM  14 years agoPost 9
Raffy

rrElite Veteran

Chicago, Illinois

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Replace your receiver battery.

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09-15-2003 10:06 PM  14 years agoPost 10
Drunk Monk

rrProfessor

Preston, UK

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I've heard that about those screws as well, if they were touching on the boom and vibrating they would definately cause interfearence. I'd better go and check mine now....


Stephen

I only open my mouth to change feet.....

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09-15-2003 10:09 PM  14 years agoPost 11
Arthur Lee

rrNovice

Singapore

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My RX batteries are almost always good charges...erm..I never use them pass the half way mark anyway...shouldn't be the batts....might be the boom screws...will try and post

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09-15-2003 10:22 PM  14 years agoPost 12
Raffy

rrElite Veteran

Chicago, Illinois

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Open the battery wrap and inspect the solders on the terminals.
If there is a poor solder, then your battery will not supply sufficient current under load and cause the glitches.
This is a safety check most specially if your heli was rebuilt from a crash.
Boom screws?......I say, not.

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09-16-2003 01:09 AM  14 years agoPost 13
Arthur Lee

rrNovice

Singapore

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point taken...happens to me with both my RX batteries...still it's worth a try...thanks a million

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09-16-2003 07:42 PM  14 years agoPost 14
Arthur Lee

rrNovice

Singapore

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still.....

Went for my daily flight earlier on with the new tail and stuff.....flew one tank during lunch and then another two after work...

was just hovering during lunch time and was quite surprised that the change of the boom worked...full of confidence I went for the flight after work...

Went high up...just in case the glitch is still there....

Then it happened....three quarters through my first tank in the evening the heli had a MAJOR glitch AGAIN!!!!

Brought it down and packed up.....damn frustrating....

Was talking to a flying buddy and he suggested that the RX x'tal could be the fault...suggested to me to change the Xtal and see how it goes...what do you guys reckon???


Have checked all the screws and joints and I'm Pretty certain that there are no metal parts causing the glitch....should I just change the controller to a Futaba 9CHP????I have an Eclispe 7 somewhere in my old shuttle which I think may be better doing the job...quite lazy to change over though....

think I'll just switch over and see if the glitch is still there...can someone advise me on the xtal???

Thanks again

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09-16-2003 08:02 PM  14 years agoPost 15
Drunk Monk

rrProfessor

Preston, UK

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I had a glitch on my rappy 30 about 2 months ago, when it was hovering or flying round i found that the tail would kick about 45 degrees either way at random. I have a CSM560 and 8700G servo which is mounted on the boom. It turns out the swash plate was also giggling around but because the tail was so quick that was most noticable. It would do it every couple minutes. After talking to a guy from revolution models and CSM they said that it was an interference problem and they thought it was something to do with the belt building up static and discharging through the tail servo. I had a metal tail on at the time, which has a metal belt tensioner which they recomended to change back for the standard plastic one (as a test) and also to connect a wire from the metal boom to one of the engine mount screws so that any build up of static from the belt would hopefully discharge throught the engine, or something like that. Anyway I have to say that I was very doubtful of it working but I took the boom out and filed a patch down to the metal (it was a red coloured one) and put it back in with a wire attatched and fastened it to one of the engine mount bolts. I did also change the tensioner back to the plastic one and then gave it a test. And it worked and has done since. I've no idea what caused this, the heli was fine for 12 months from new with no problems and then started glitching, but connecting that wire worked. I did try taking off the wire once after I had to replace the boom but it started to kick the tail again so I put it back on and it fixed it.

Go figure.........

Has anybody heard about this fix?


Stephen

I only open my mouth to change feet.....

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