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Thunder Power RC . Mikado Modellhubschrauber . Futaba-RC

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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 raptor 50 major tracking problem
 
 
rockier
Key Veteran
Location: Las Vegas

My Posts This: Topic  Forum

Dino Spadaccini has it right. You have a servo on the aileron or elevator that is bad.

This has been tested many time and it comes back to the servos.

By flipping the grips. This will take the pressure off the servos.

On some heli's it will go away.

------,\\\|///,-----
___*| # # |*
oo0---(_)---0oo
06-25-2009 12:53 AM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Well I was looking at my rotor head and noticed that it will rock back and forth where the rotor head guide pins go through the washout hub. I noticed that the washout hub holes on elongated. Are they supposed to be that way? I also strip one the mounting holes on the washout hub. Just to be safe I decided to upgrade to the MVPV0445 CNC Washout hub. I know that this is probably not the fix, but I had to replace it anyways. so why not upgrade now.
06-25-2009 03:14 AM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Well just got done checking my spindle. Nothing wrong with it. Main shaft also straight. Must be in leakage.
the hoops seem to be a little loose could this be it? Rotor head does not fit tight on the main shaft. It will rock back and forth on the main shaft at the Jesus bolt. Could this cause tracking issues.?
06-25-2009 03:47 AM
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Billebob
Senior Heliman
Location: Tim-buck-2

My Posts This: Topic  Forum
Quote 
It will rock back and forth on the main shaft at the Jesus bolt.

Get a metal clamp-up TT hub or glue the plastic head block on to the mast with 5 minute epoxy. Tighten the mast bolt before the epoxy cures so the glue fills the slightly distorted egg shape.I doubt that slop will cause tracking issues-it's more like having soft dampers.

Tip-use epoxy sparingly, invert the mast during the cure so it doesn't run down and jam the washout plus clean any excess residue off the exposed mast surface below the head block before it hardens.

Flip-it-e-flop
06-25-2009 11:09 AM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Well I have my Raptor back together. I replaced the plastic washout assembly with a metal washout assembly. I completely disassemble the head and found nothing. I went ahead and grease the dampers and spindle. The metal washout took out alot of slop in the head that I had previously. How long does it take for blue lock tight to set? Tomorrow will be the big test to see if I still have a blade tracking issue.
06-27-2009 10:14 PM
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JuanRodriguez
Elite Veteran
Location: Rochester, New York

My Posts This: Topic  Forum
Quote 
How long does it take for blue lock tight to set?

Can't go wrong with over night....

BTW, what kind of blades are you running ? Sorry if you mentioned it already....don't feel like sifting through 3 pages of posts.....
06-27-2009 10:57 PM
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HeliCSR
Senior Heliman
Location: Hesperia, Ca, US

My Posts This: Topic  Forum		HEY....its to high of a headspeed.

The blade tip is going faster then the speed of sound,
I seen it at the field, I can tell by the sound of his rotor
that it was too much rpm.

I fly and then I fly some more.
If it don't glitch then I won't crash.
06-27-2009 11:15 PM
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BarracudaHockey
rrMaster
Location: Orange Park FL

My Posts This: Topic  Forum		First time I've heard that one.


AMA 77227
http://www.jaxrc.com
06-28-2009 01:18 AM
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Swoop
Key Veteran
Location: Newark, DE USA

My Posts This: Topic  Forum		I got 315mph at the tip using 2000rpm headspeed and 26.5inch circle (roughly my r50's head radius). Speed of sound is 761mph. prob not the case here.

Chris
Titan,Kasama,MP5,Radix
Trex450SE,MavrikkG5,Phoenix35
06-28-2009 03:32 AM
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HeliCSR
Senior Heliman
Location: Hesperia, Ca, US

My Posts This: Topic  Forum		And to update, two old guys were the ones that said beyond speed of sound.

But here's my point, maybe it does not have to reach speed of sound, maybe its the relationship between how fast a blade of this amount of weight can cut cleanly thru air before it flutters.

Cause thats what that is. Flutter.

I had this happen to me once with a very small heli... A picolo.

But I would try slowing the head speed down, and experment, cause
that dont cost any money.

And the guy I saw at the field, said he changed everything and nothing
fixed it. The only thing he did not change was the blades.

Then I would try a blades with more weight. And see what that does.

I fly and then I fly some more.
If it don't glitch then I won't crash.
06-28-2009 04:04 AM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Decided to take a look at my fuel lines in my main and header tank. The clunk had come off the line in the main tank. Fuel line was pretty deteriorated. Header tank looked OK. Replaced anyway. Lines are all new. Do you think this could have caused blade tracking issue also? I thinking that the engine may have sped up causing the blades to go out of track, even though the header tank lines were OK. Main tank would began to suck air at half tank, causing air to flow into header tank. Which in the end causing fuel mixture to go lean. At least that is my theory. I plan on flying tomorrow. I will know then for sure.
06-28-2009 05:46 AM
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BarracudaHockey
rrMaster
Location: Orange Park FL

My Posts This: Topic  Forum		There's guys that run these things at 2200, its hard on the bearings but it's not causing the tracking problem.

I almost spit coke on my keyboard when I read the supersonic thing.


AMA 77227
http://www.jaxrc.com
06-28-2009 12:48 PM
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Dino Spadaccini
Key Veteran
Location: USA

My Posts This: Topic  Forum		problem

have you looked at your servos if not you are wasting your time with all this super sonic tip speed, at one time i ran my head speed at 2300 ish with a metal head and plastic grips. check your servos

Team Thunder Tiger
Team Futaba
CY Enterprises
Morgan fuel
06-28-2009 02:18 PM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Well something had to cause it and I have completely inspected the head. And nothing out of the ordinary. In fact when I built this heli I use www.raptortechnique.com and Ray's Authoritative DVD series. So if I still have tracking issue then it must be in the Thunder tiger carbon blades that came with the kit. It's 7:30 mountain time. In about 2 hrs. from now I will know for sure! Wish me luck!! Anyways, at least I won't have a flame out because of defective fuel lines.
06-28-2009 02:30 PM
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turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

My Posts This: Topic  Forum		Haven't read through the whole thread but have you changed the plastic blade grips? I had woof that was cured with new blade grips. They tend to stretch when crashed but look fine. Maybe the previous owner had a crash and used the same grips again.
If you have sorry about the repeat.

Setup is everything, All my heli's can fly better than I can pilot them
06-28-2009 03:25 PM
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turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

My Posts This: Topic  Forum		I have also had woof that wa cured with different blades also.
I went from TT carbons with woof to Align's and the problem was gone.
Good Luck to You!

Setup is everything, All my heli's can fly better than I can pilot them
06-28-2009 03:27 PM
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ZAC ATTACK
Veteran
Location: Hamilton Ontario, CANADA

My Posts This: Topic  Forum		If the Rotor Hub is moving back and forth on the main shaft,you got problems with the Rotor-Hub.There should be no-play at all when its tightened up!!Just PMME if you need a plastic/metal Rotor-Hub.I use Kasama and have loads of TT head parts!Trying to help,you can have the plastic Rotor -Hub if you pay the shipping.Cheers!

MAAC#77677 Medicated daily for your protection
06-28-2009 03:53 PM
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coolingfan
Senior Heliman
Location: Grand Junction, Colorado

My Posts This: Topic  Forum		Well I just got back from flying. Everything looked good and then out of the blue the blades when woof and stay woof until I land a spooled down. Someone refresh me on how tight the blade grip bolts needs to be with carbons installed! I have them tight enough when you lay the heli on it's side and bump it the blades will just start to swing down. Is that to tight? Would that cause the blades to go woof? I guess I will replace all the bearings in the head. I know some one early mention servos might be causing it. I am however having trouble understanding how a bad servo would cause this. There's not that many parts in the head it must be bad bearing that I am missing. The heli did sit for about 6 months. If it sounds like I a little frustrated. Well I am. Went I built this thing 1 year ago it was a smooth as glass. And I have only flown it aprox. 1/2 dozen times. Maybe the 6 months it set was not good on bearings.
06-28-2009 09:24 PM
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HeliCSR
Senior Heliman
Location: Hesperia, Ca, US

My Posts This: Topic  Forum		DUDE..........

You can check your bearings but first, turn down the headspeed a little
and see if the make any difference.

It is not a servo, dont go spending money chasing a RED Fish.

I fly and then I fly some more.
If it don't glitch then I won't crash.
06-28-2009 09:52 PM
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turboomni
Elite Veteran
Location: 63 Rambler Down By The Dumpster

My Posts This: Topic  Forum		One of your blades warped?

Setup is everything, All my heli's can fly better than I can pilot them
06-28-2009 09:58 PM
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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 raptor 50 major tracking problem
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