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Flaps Rubbing Top Skin Overhang?

 
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schmoboy(at)cox.net
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PostPosted: Sun Feb 19, 2006 10:03 pm    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

I temporarily attached the flaps this weekend to set neutral for aileron
actuation. I noticed when bottoming out the flaps against the rear spar
as instructed, that the flaps (both wings) rub on the overhang of the
top skins. They barely rub, but rub none the less. Is this normal? I
would hope not, as I can imagine that nice new paint would be rubbing
off every time flaps are used.

If this is not desired/normal, any suggestions?

Thanks,

-Sean #40303 (about to start bottom skins)


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Tim(at)MyRV10.com
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PostPosted: Mon Feb 20, 2006 4:26 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

It's probably nice to have a tight gap there. What I did was to buy
some UHMW tape, and I applied tape to the underside of the trailing
edge of the wing skins all the way along. That should help keep the
flaps from getting as scratches, which is common to see.

Tim Olson - RV-10 N104CD - Flying
do not archive
Sean Stephens wrote:
Quote:


I temporarily attached the flaps this weekend to set neutral for aileron
actuation. I noticed when bottoming out the flaps against the rear spar
as instructed, that the flaps (both wings) rub on the overhang of the
top skins. They barely rub, but rub none the less. Is this normal? I
would hope not, as I can imagine that nice new paint would be rubbing
off every time flaps are used.

If this is not desired/normal, any suggestions?

Thanks,

-Sean #40303 (about to start bottom skins)




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deruiteraircraftservices(
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PostPosted: Mon Feb 20, 2006 5:04 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

hi all,

Teflon paint is what is used for the same purpose on airliners. It's not
cheap, but does a wonderful job. The same paint is also useful in any other
area's that frequently get rubbed. It is however not suitable for walkways
as it has a very slippery surface. Among aother's AKZO Aerospace makes it.
There's also a Boeing spec for this stuff.

Marcel
---


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Dick Sipp



Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI

PostPosted: Mon Feb 20, 2006 6:27 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

Hi Sean,

I believe this is normal in all of the RV models, designed to be that way
probably for better aerodynamics.

There have been several approaches to "wear" strips or other protection,
tapes of various types as Tim mentioned applied in strips or larger areas.
On my 4 the painter sprayed a teflon impregnated paint on the area of the
flap that contacts the skin, it has held up well for years. Others have
used various types on stick on materials like the firewall heat shield
aluminum.

Dick Sipp
RV4 N250DS RV10 40065

---


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schmoboy(at)cox.net
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PostPosted: Mon Feb 20, 2006 6:35 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

Thanks for all the replies.

-Sean

do not archive

Richard Sipp wrote:
[quote]

Hi Sean,

I believe this is normal in all of the RV models, designed to be that
way probably for better aerodynamics.

There have been several approaches to "wear" strips or other
protection, tapes of various types as Tim mentioned applied in strips
or larger areas. On my 4 the painter sprayed a teflon impregnated
paint on the area of the flap that contacts the skin, it has held up
well for years. Others have used various types on stick on materials
like the firewall heat shield aluminum.

Dick Sipp
RV4 N250DS RV10 40065

---


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Jerry Grimmonpre'



Joined: 09 Jan 2006
Posts: 144
Location: Huntley, Illinois 60142

PostPosted: Mon Feb 20, 2006 9:57 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

Do Not Archive
Tim ...
What is this UHMW tape you refer to and where to get it?
Thanks,
Jerry Grimmonpre'
RV8A

Quote:


It's probably nice to have a tight gap there. What I did was to buy
some UHMW tape, and I applied tape to the underside of the trailing
edge of the wing skins all the way along. That should help keep the
flaps from getting as scratches, which is common to see.


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Tim(at)MyRV10.com
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PostPosted: Mon Feb 20, 2006 10:17 am    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

Check this link:

http://www.vansaircraft.com/cgi-bin/catalog.cgi?ident=1140459300-156-660&browse=misc&product=uhmwtape

Description
This UHMW tape replaces the stainless steel tape previously used between
the flap and the top wing skin to protect against scratches in the paint
and even corrosion if the scrapes are neglected. Use this tape to
protect leading edge of flap, canopy rails, etc., from scuffing. 3" X
10', or the 3" X 14' adhesive strip is enough to cover both flaps,
depending on model.

CLEAR UHMW TAPE 4/6/7/8
Part Number = TAPE UHMW 3"X10'
Price = $11.00

CLEAR UHMW TAPE 9/9A
Part Number = TAPE UHMW 3"X14'
Price = $14.50
Jerry Grimmonpre wrote:
Quote:


Do Not Archive Tim ...
What is this UHMW tape you refer to and where to get it?
Thanks,
Jerry Grimmonpre'
RV8A



>
>
> It's probably nice to have a tight gap there. What I did was to buy
> some UHMW tape, and I applied tape to the underside of the trailing
> edge of the wing skins all the way along. That should help keep the
> flaps from getting as scratches, which is common to see.



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jesse(at)itecusa.org
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PostPosted: Mon Feb 20, 2006 5:43 pm    Post subject: Flaps Rubbing Top Skin Overhang? Reply with quote

We put the UHMV on the top of the flap and that took care of it.

Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org
www.itecusa.org
Fax: 815-377-3694

I am in Ecuador until May, 2006. If you have questions regarding I-TEC,
please call the office at 352-465-4545. If you would like to talk to me,
please call me at 352-505-1899. This number won't always be on, but it has
voicemail that will get to me in Ecuador.

--


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