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HelicopterThunder TigerOther › high frequency osculation on a Raptor V2 50
09-01-2003 04:05 PM  14 years agoPost 1
Larry Legg

rrApprentice

Kansas City, Missouri

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I have a Raptor 50 V2 (tt50) with MA500 blades, Mavrickk 80mm tail blades, Xcell paddles with one gram flybar weights (Balanced) and aluminum collective tray…everything else is stock. My problem is that I am getting a high frequency osculation that causes the 401 gyro to drift. When I used two layers of SIG servo tape to isolate the gyro the drifting stopped. The osculation was bad enough that it broke loose the foam between the adhesive tape. I first thought that this was due to the foam tape being old, but the same thing happened to new tape. As you fly the only noticeable result of the osculation is the main fuel tank sloshing and a 1/16 to 1/32-inch osculation (buzz) on the left side of the horizontal fin. I do not get any noticable vertical movement on the tail (what you get when your tail is out of balance). I recently replaced the main shaft, flybar and spindle with Mavrikk parts after a ding, but the problem was apparent before the crash.

I have balanced the main blades, flybar/paddles and fan. I have never had this type of vibration before. I have tried leaning and richening the engine…no change. It is more apparent at a higher head speed (stunt mode about 1900 RPM).

I do have my 401 gyro mounted on top of the servo tray. I was going to move it to the back to possibly lessen the vibration transmitting to the gyro. I don’t know if this will help or not but I am willing to try anything…that I can afford.

Has anyone had a similar problem? Any suggestions?

Thanks

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09-01-2003 05:31 PM  14 years agoPost 2
smity777

rrVeteran

California

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I was having a similar situation. For me I turned the 401 gain up all the way. That improved my issue. Then I took the CSM foam tape off, and used 2 lairs of regular double stick (very thin foam lair) tape. Now the tail is rock solid. My 401 is mounted at the tip of the nose plate. Don't know if that will help or not.

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09-01-2003 07:27 PM  14 years agoPost 3
TerranAce007

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Austin, TX

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Maybe its a bad servo or radio interference?

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09-02-2003 12:47 AM  14 years agoPost 4
Larry Legg

rrApprentice

Kansas City, Missouri

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a possible solution??

I took the Raptor 50 out to the field to fly today. A friend of mine said the tail shaft seemed to be bent. I will replace it tomorrow and see if it solves the problem.

Thanks for your help

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HelicopterThunder TigerOther › high frequency osculation on a Raptor V2 50
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