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"Heavy" wing on Series 7

 
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darinh



Joined: 20 Apr 2006
Posts: 327
Location: Utah

PostPosted: Wed Aug 20, 2008 8:30 am    Post subject: "Heavy" wing on Series 7 Reply with quote

I have about 10 hours on my 7 now and I am loving it but I have a "heavy' left wing. I have adjusted the flaperons a bit to try to fix the problem but I don't really want to move them much more. I know this condition can be fixed by adjusting the struts but am unsure which end bearing to adjust and which way. basically, while in cruise configuration my airplane tends to bank ever so slightly to the left if I don't maintain some right stick pressure. It would be awesome if these airplanes had a manual flaperon trim. Anyway, I would think that turning the left front rod bearing out a few turn to raise the LE of the left wing a touch or do just the opposite to the right side would help but I wanted to get an opinion from the group.

By the way, this thing is a great performer! This morning I was truing out at 117 mph at 6500' at about 65% - 70% power (30 in. MAP). The climb is outrageous and the deck angle can be downright scary steep. I have yet to push it but I can easily maintain 1200 ft./min. at 70 mph so I am nowhere near Vx.


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Darin Hawkes
Series 7
914 Turbo
Kaysville, Utah
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FlyboyTR



Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

PostPosted: Wed Aug 20, 2008 2:38 pm    Post subject: Re: "Heavy" wing on Series 7 Reply with quote

Adjusting the flaperons really won't change anything because they will return to neutral and the only thing that will change position is your stick...a little to one side or the other depending on which aileron you changed the linkage on.

If it's banking to the left...you can shorten the left rear or raise the left front...or a small combination of both. You can also make minor changes on the right wing. It would be just the opposite of the left wing.

Do you have a ball? ...slip/skid indicator. Is it running in the center? It is possible you have an issue other than the wing.

Travis Smile


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Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
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darinh



Joined: 20 Apr 2006
Posts: 327
Location: Utah

PostPosted: Wed Aug 20, 2008 8:21 pm    Post subject: Re: "Heavy" wing on Series 7 Reply with quote

Travis,

You are right, the flaperons will simply find neutral...I thought of this after adjusting them the first time. Don't really know what I was thinking when I made the adjustment...I have moved them back and now plan to do a little more investigation to determine if it is a bank or yaw issue.


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Darin Hawkes
Series 7
914 Turbo
Kaysville, Utah
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FlyboyTR



Joined: 04 Nov 2006
Posts: 215
Location: Mobile, Alabama

PostPosted: Thu Aug 21, 2008 2:11 am    Post subject: Re: "Heavy" wing on Series 7 Reply with quote

Darin,
Yep....You are not alone in the "I'll adjust one aileron..." scenario! That is a very common mistake. Smile

After I responded to your original post I found where someone had started a second post on the same thread (I hate it when people do that!). It makes a thread hard to follow and clutters up the Forum. OK...I'm off the soap-box! Laughing

Anyway...It sounds like most things were already covered. Yes, You do need to determine whether it is a heavy wing or yaw. Your Ball indicator needs to be where you can see it and easily determine if you're centered or not. This is something that will change depending on your power setting and airspeed. I ended up with a small trim tab on my rudder and set it to center the ball at my "usual" cruise speed.

I can't speak for the 7, but on the Series 5, you don't want to stall it in an uncoordinated configuration! That can be really bad on short final...or at low altitude.

You have gotten some great advise from folks on this Forum. I look forward to hearing about exactly what is causing the problem. Good Luck!

Travis Very Happy


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Travis Rayner
Mobile, AL
Skystar Vixen, N-789DF
Continental IO-240, Prince P-Tip Prop
ADI-II Autopilot
AnyWhereMap Navigation with weather
www.enotam.net (My Flying Info Website)
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