Well i got the WOLF part of the {WOLF&PUFF} today and this is almost a new heli only 1 1/2 gal of fuel through her and only hovering no realy stressful flying looks like ill have to do the grip flip.
Blades went out of track about 3 inch's (scarry) 
any comments would be helpfull... 

Kermit
Raptor30
I will get a 60 some day 

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The blade-tracking problem on the Raptor 30/50 is not a design problem it is a control system free-play problem. The most common problem is linkage balls and ball bearings moving on the screws. Use thread lock to fill up the space between the screws and the ball or bearing. Also, use thick CA to secure the threads to the plastic parts.

I have two small Raptors (30 and 50) that have been flying for many years without a problem. There is no substitute for a good tight control system. The flipped head is treating the symptom and does nothing to correct the root cause, plus it screws up the control system geometry.

Another cause of blade flutter that I have seen is caused by blade cg being to far aft caused by recovering of wood blades without chord wise balancing.
 

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Hi Kermit, check out my site, it's got some info on the "woof". I've tried every mod known to man :+), but only found one real fix. The link I am sending has some info about how I cured it, you can then navigate to the "flutter page", and read more about it.

http://pages.sbcglobal.net/g2driver/_wsn/page8.html

Hope this helps,
Raj 

Raj Patel
Conoco Aviation
Ponca City, OK
http://pages.sbcglobal.net/g2driver/index.html
 

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My R50 had the exact same problem when it was new. It only showed up when the heli was coming in from FF (decending, part throttle, about 0 pitch, etc.). After two of the local hot sticks and myself looked it over, we only found one thing: there was a bit of vertical play in the main shaft. We tightened that up and Carlos took it back up. He couldn't get it to repeat no matter what he tried. I haven't see the "Woof" since then.

Raj,

You have made a VERY nice set of tools for your helis! It sure must be nice having access to a proper machine shop... Sigh. Thanks for the heads up about the head block. I will definitely keep that in mind on my own bird. By the way, how much bear did that head block jig cost anyway??? *grin* 
 

-Roamer 

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Sounds to me as if the rpm is going to high on approach causing the flutter. As you approach a landing you should move the idle up to normal to prevent overspeeding. 

Mike Mas
Rotory Modeler
mail@rotory.com 

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Hi, thanks for the comments, actually, I have a friend who has a machine shop, so it cost me nothing!

Raj 

Raj Patel
Conoco Aviation
Ponca City, OK
http://pages.sbcglobal.net/g2driver/index.html
 

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That is what i was thinking that i have to much rotor speed.
As long as it was in a hover it was fine but when i came out of the throtle it flutterd then i banged the throtle up and down to get it to quit but as soon as i started to land again the flutter came back.
the only thing i have done to this heli was put a T/R servo in saturday and i think it hates me for doing that but the tail was great what time it did not flutter. 

Kermit
Raptor30
I will get a 60 some day 

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Thanks for all the info guys
Iam going to lower my TH-CURVS and slow the head speed down first to see if it helps and if it dont ill do the head flip. 

Kermit
Raptor30
I will get a 60 some day 

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I have seen many raptors flutter with a headspeed as low as 1750rpm. If it does, you need to look for what's causing the problem, not just slowing the head speed down. There are allot of "band-aids" for flutter, many of which just delay the onset, but don't actually fix the problem. What most people don't realize is the undue strain on the control system and servos as a result. I have done allot of work trying to fix the problem as every raptor I have owned has fluttered. Check out my site for more info.

Raj
 
 

Raj Patel
Conoco Aviation
Ponca City, OK
http://pages.sbcglobal.net/g2driver/index.html
 

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