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SSE Gap in Wing/Fuse

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Old 04-15-2006 | 11:48 AM
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Default SSE Gap in Wing/Fuse

Okay guys, I have been following all these SSE builds for several months while I built my own SSE. I have certainly learned a great deal from RCU which has save me countless errors I can assure you!

I have now reached a somewhat major milestone in my SSE build (pic #1) - I now have something that actually resembles a plane! This thing may fly after all!

Anyway, when fitting the wings to the fuselage my elation quickly faded as I discovered a gap between the fuselage side and the wing root. Not all the way down the root, however. This is true for both the top and bottom of each wing. I have some pics that hopefully describe:

Picture2 - Top Right Wing. Flush with fuse for about 1/2 the length, then it pulls out at the leading edge.

Picture3 - Scale reference. Looks like 1/16" gap.

Picture4 - Bottom Right Wing. Not nearly as flush as the top portion of the wing.

Picture5 - Scale Reference. Again the gap is approx 1/16".

So, how bad is this?

How should I proceed? Should I try and sand down the "high side" and try to get the wing to go flush?

I worry about changing the aerodynamic portion of the wing/fuse relationship and fear the "fix" might be worse than what I perceive to be the problem ... know what I mean?

Thanks for the help!!

-Alex
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Old 04-15-2006 | 11:57 AM
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Default RE: SSE Gap in Wing/Fuse

MasterAlex,
Take a deep breath, it's not as bad as it looks. I had a similar problem on one of the SSE's that I've built. The first part of the problem was the wing tube (the metal one) was just a bit too long. It didn't allow the wing halves to fit down flush on the side of the fuselage. So check that first. If needed just file a little bit off the end of the metal tube.

After you've checked that now see how the wing halves butt up against the side of the fuselage. You may need to do a little bit of sanding on the root rib to get it to fit flush. The reference point that you'll need to pay attention to is that the leading edge sits at a 90° angle to the side of the fuselage. So sand down the root rib a little bit so that it sits flush up against the side of the fuselage.

Hope this helps

Ken
Old 04-15-2006 | 12:01 PM
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From: Upplands Vasby, SWEDEN
Default RE: SSE Gap in Wing/Fuse

Hi!
Either sand down the high side or build up the low side...!
That easy! Will not change anything aerodynamically.
Regards!

Regards!
Jan K
Sweden
Old 04-15-2006 | 12:58 PM
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Default RE: SSE Gap in Wing/Fuse

I had the exact same issue on mine & I sanded the high side down until it sat flush. Also, as Ken said check your wing tube to make sure it's not too long. Just put one wing on at a time & see if it sits flush
Old 04-15-2006 | 03:56 PM
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Default RE: SSE Gap in Wing/Fuse

Thank you all!!

Had a multitude of issues. Ken, right on; the wing tube was a bit too long. Gotta love the Dremel. Once that was solved, the wing roots still needed a bit of sanding, but as you can see, it is much better now.

Picture1 - Left Wing

Picture2 - Right Wing

This type of sharing is what makes RCU so great! Thanks again.

-Alex

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Old 04-16-2006 | 10:45 AM
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Default RE: SSE Gap in Wing/Fuse

I had the same issue on mine. They tell you to be very careful with the root rib to make sure it lines up on the plans, and guess what? The plans are wrong!

Also, don't do what they tell you to do on the TE dowel. My right wing TE fell out of the hole on my 4th flight. Made for an interesting landing! I glued a new dowel into the wing and left 2 inches or so sticking out. Just enough so the two dowels don't hit each other in the fuse.
Old 04-16-2006 | 11:34 AM
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Default RE: SSE Gap in Wing/Fuse

My manual had me epoxy the TE dowel into the fuse, right up against the servo tray. its going no where without the fuse
Old 04-17-2006 | 07:32 AM
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Default RE: SSE Gap in Wing/Fuse

Hey all,

I was about to start a new thread with a similar question, but thought you experts will know what to do. My SE wings must be a little off. Here is what I have.

With the wings rubber banded in place, the LE is squae to the fuse, but when I try to set equal distances to the TE of the stab, the stab is not centered on the LE/TE. If I very carefully center the stab on the LE/TE and also go from the TE of the stab to the inboard end of the wing TE, the measurements to the outside edge of the wing TE is off by 3/8".

I first should have mentioned I have already covered the plane (stab/fin off the plane). This is my second SE, just trying to build a little lighter....

So is it more important for the stab to be parallel to the wing LE or "square" with respect to itself???

Thanks,

Mac
Old 04-17-2006 | 09:56 AM
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Default RE: SSE Gap in Wing/Fuse

ORIGINAL: The MacDaddy

Hey all,

I was about to start a new thread with a similar question, but thought you experts will know what to do. My SE wings must be a little off. Here is what I have.

With the wings rubber banded in place, the LE is squae to the fuse, but when I try to set equal distances to the TE of the stab, the stab is not centered on the LE/TE. If I very carefully center the stab on the LE/TE and also go from the TE of the stab to the inboard end of the wing TE, the measurements to the outside edge of the wing TE is off by 3/8".

I first should have mentioned I have already covered the plane (stab/fin off the plane). This is my second SE, just trying to build a little lighter....

So is it more important for the stab to be parallel to the wing LE or "square" with respect to itself???

Thanks,

Mac
I'm certainly not an expert, but I had the same issue. I put a T-Pin in the center of the firewall & made the stab ends equidistant from there & then checked the distance from the TE of each wing. The wing's were still around 1/4" off if I recall. I split the difference & made it so the stab was about 1/8" off from the wing & the center of the FW. I have been wringing my SSE out for several flights & I haven't noticed any coupling from it, but I'll admit my experience level probably isn't high enough to know the difference.
I would also guess that it's more important to have the Stab square with the Fuse, but I'll let the more experienced speak to that.

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