RunRyder RC
 5  Topic Subscribe
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 4039 views POST REPLY
11-13-2005 01:55 AM  12 years agoPost 21
mattijs

rrApprentice

Keerbergen Belgium

My Posts: All  Forum  Topic

The violent spool down are the mainblades advancing imo in a different angle from the spool down..reason being not completely the same pressure at the root...one of them is too loose but probably on of them to stiffly fixated.

I have this alot when i slam my hornet back together and don't take the time to keep the pressure equal at both sides.

When it happens (after having a completely smooth flight) the heli almost tips over from dancing around so hard....you can make it go away instantanious by jamming the collectiive a little as it straightens the blades + comletely gotten rid of with some small pressure adjustements.

It might return after a flight in the cold or something...it used to drive me crazy untill i found what it was

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
11-13-2005 04:08 AM  12 years agoPost 22
Buzzsaw46

rrVeteran

Spring Valley, MN.

My Posts: All  Forum  Topic

mattijs, This is exactly what I thought was happening and I tried very hard to adjust both blades equally from too loose to too tight with the same shake. I do thank you for the suggestion though.

Cant wait to fly tomarrow, and I get to fly an H2 with the B/H head

PM  EMAIL  GALLERY  Attn:RR  Quote
11-13-2005 03:05 PM  12 years agoPost 23
mattijs

rrApprentice

Keerbergen Belgium

My Posts: All  Forum  Topic

well, sometimes i can't manage to make it go away but as i'm pretty sure it's what i think it is, i don't care about it. when it kicks in i just punch the collective untill its over.

Afterall, it's only transitionally and as long as it flies smooth it can't be an out of balance issue...allthough a small out of balance might help it...maybe...?

I know that my mainshaft isn't super straight...there is bound to be some vibration as it's a hammered back to straight one...not new one.

Maybe when the resonant frequency kicks in the blades get thrown around a bit....


Another thing i noticed when was that if you DO hhave an inbalance becuase of a bend mainshaft....at full speed the vibration in the shaft can cause it to vibrate 5 mm atleast. You can see it when you look at the flybar paddles...instead of one clear line at the outsides you can see two distinct lines.

Freaky to know that the shaft can get hammered that hard!

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
11-13-2005 06:36 PM  12 years agoPost 24
Micro-Maniac

rrElite Veteran

Pasco,Washington Formerly: Captain Chaos

My Posts: All  Forum  Topic

I'm sorry, but I hate to watch you guys barking up the wrong tree on this.

I too have been there dismissing the tracking thinking it was as good as it can get and it had to be some other culprit, but I've experienced and dealt with this issue enough now to recognize it beyond a doubt just from the description of it.

Now even though the problem is simple, that doesn't always mean the cure will be also. A full or half turn on one of the bell linkages may cure it, but sometimes it takes less than a half turn and makes it complicated. You may have to completely unscrew one or both bell linkages and hope to reassemble them crossthreaded. I've even simply turned both links the same number of turns and cured it. That's how sensitive it can be on a tight Duzi setup.

If you do manage to find that sweet spot and cure the spool shakes, you might be amazed at just how smooth it can really be. I know I was.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-16-2006 01:14 PM  12 years agoPost 25
mattijs

rrApprentice

Keerbergen Belgium

My Posts: All  Forum  Topic

captain chaos....you are absolutely right....had nothing to do with blade bold tension instead it is tracking like you said!!

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
05-16-2006 04:00 PM  12 years agoPost 26
Micro-Maniac

rrElite Veteran

Pasco,Washington Formerly: Captain Chaos

My Posts: All  Forum  Topic

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 4039 views POST REPLY
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Friday, June 22 - 2:55 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online