FlyingGiants - View Single Post - Raptor 50 SE Problems! "Flutter, Flutter" and a broken tank

pipercub123 · 07-27-2008, 03:31 PM

Hey guys,

I went out with my 50 SE two weeks ago and had a flutter when flying. This is my second season with it and have only gotten a flutter once in a while with it. Mostly coming out of a flip or a loop. This time it fluttered pretty bad compared to the usual so I landed and inspected it. It seemed fine than while in a low hover I lost the collective and when I landed my tank popped out of it. It didn't seem like too hard of a landing. I found out my JR servo arm off from my JR [FONT='Verdana','sans-serif']DS821 Sport Hi-Torque Digital Servo broke. So I had plans of upgrading to all aluminum arms, but figured to throw on another plastic arm for now. After all, I flew it all last summer and fall and some of this summer with no problems. I took it out, did a hover to check it, circled around, pulled a loop and had a real bad flutter where the head speed didn't want to pick back up and than flutterd and came back. Than my tank popped out of it and the line came off so I autorotated back in. Hmm, my head speed seems to be fine. A little on the high side and my pitch is 0 at half stick and about +12 and -12 or about as much as I can get out of it. When I look at the built in gauge on the heli, the pitch needle lines right up to the marks. Perhaps plastic arm isn't up to the task and maybe my DS821 has had enough? I also have the DS 821 on the ailerons and the elevator. I'm about ready to order some new servos for her because if I don't I suspect a crash is coming and that could be just as costly. What would be some good servos that are budget friendly and would last a long time? I fly moderate 3D, but want to push it harder so I need good ones.[/FONT]
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[FONT='Verdana','sans-serif']Also, my fuel tank has holes in it where the two front bubbles are on the tank sides. The tank must have been rubbing in the frame. Anyone have this problem before? What's a good fix? Should I use some double sided tape on the dimples of my new tank to keep the vibration down?[/FONT]
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[FONT='Verdana','sans-serif']I've seen some guys fly some hardcore stuff with the Raptor 50 with my OS hyper 50 I don't think a simple loop would bog it down because my head speed is not low. Also, when the flutter stops the head speed seems to be right there. It's not like the flutter starts and the engine bogs down and than slowly spools back up. I'm also using 30% nitro and I'm flying G4 carbon blades. [/FONT]
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[FONT='Verdana','sans-serif']Thanks for the help![/FONT]

07-27-2008, 03:31 PM	#1
pipercub123 Bad-ass Super Contributer! Join Date: Sep 2007 Location: NY, USA Age: 25 Posts: 387	Raptor 50 SE Problems! "Flutter, Flutter" and a broken tank Hey guys, I went out with my 50 SE two weeks ago and had a flutter when flying. This is my second season with it and have only gotten a flutter once in a while with it. Mostly coming out of a flip or a loop. This time it fluttered pretty bad compared to the usual so I landed and inspected it. It seemed fine than while in a low hover I lost the collective and when I landed my tank popped out of it. It didn't seem like too hard of a landing. I found out my JR servo arm off from my JR [FONT='Verdana','sans-serif']DS821 Sport Hi-Torque Digital Servo broke. So I had plans of upgrading to all aluminum arms, but figured to throw on another plastic arm for now. After all, I flew it all last summer and fall and some of this summer with no problems. I took it out, did a hover to check it, circled around, pulled a loop and had a real bad flutter where the head speed didn't want to pick back up and than flutterd and came back. Than my tank popped out of it and the line came off so I autorotated back in. Hmm, my head speed seems to be fine. A little on the high side and my pitch is 0 at half stick and about +12 and -12 or about as much as I can get out of it. When I look at the built in gauge on the heli, the pitch needle lines right up to the marks. Perhaps plastic arm isn't up to the task and maybe my DS821 has had enough? I also have the DS 821 on the ailerons and the elevator. I'm about ready to order some new servos for her because if I don't I suspect a crash is coming and that could be just as costly. What would be some good servos that are budget friendly and would last a long time? I fly moderate 3D, but want to push it harder so I need good ones.[/FONT] [FONT='Verdana','sans-serif'][/FONT] [FONT='Verdana','sans-serif']Also, my fuel tank has holes in it where the two front bubbles are on the tank sides. The tank must have been rubbing in the frame. Anyone have this problem before? What's a good fix? Should I use some double sided tape on the dimples of my new tank to keep the vibration down?[/FONT] [FONT='Verdana','sans-serif'][/FONT] [FONT='Verdana','sans-serif']I've seen some guys fly some hardcore stuff with the Raptor 50 with my OS hyper 50 I don't think a simple loop would bog it down because my head speed is not low. Also, when the flutter stops the head speed seems to be right there. It's not like the flutter starts and the engine bogs down and than slowly spools back up. I'm also using 30% nitro and I'm flying G4 carbon blades. [/FONT] [FONT='Verdana','sans-serif'][/FONT] [FONT='Verdana','sans-serif']Thanks for the help![/FONT]