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fklein(at)orcasonline.com
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 Posted: Tue Sep 26, 2006 7:43 pm Post subject: aileron fitting to wing |
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Gentlemen,
First, it's inspiring to read about flying experiences w/ our wonderful
little birds...especially to one who has only recently been able to get
down to some serious work on his XS mono kit. Care to take a stroll
down memory lane?
I've checked the archives on the subject of fitting the ailerons to the
wing and found no previous posts which deal with the particular problem
I've created for myself...indulge me for a moment.
Fitting the starboard aileron to the wing seemed like a piece of
cake...plenty of travel, no rubbing or snags.
The port aileron has been a somewhat different story...the first thing
I noticed after clecoing it in place was significant rubbing of the top
surface on the trailing edge closeout. Then I noticed that the trailing
edge of the port aileron was 1/8" short of the trailing tip of the
wingtip, whereas the starboard aileron was 3/8" short of the wingtip.
I also noticed that the offset between the flap closeout and the
aileron closeout on the starboard wing was 1 inch but on the port wing
it was 1.5 inches.
The net result of these differences appeared to be that the starboard
wing/aileron would have between 1/4 and 1/2 inch more chord that of the
port wing. I found no references in the manual which noted this as a
design feature; after taking numerous comparative measurements, it
appeared that the aileron closeout and hinge line of the port wing was
between 1/4 and 1/2 inch further aft than on the starboard wing. It
appeared to me that a bit of trimming would equalize the wing area, and
by moving the port aileron forward, I would reduce the rubbing between
it and the closeout.
Accordingly, I proceeded to trim (first) the lower trailing edge of the
port wing and re-established the hinge rebates, trial fitted the
aileron, and subsequently trimmed back the top trailing edge of the
closeout. After remeasuring, I found I had two wing/ailerons of the
same size.
Ahh...that pesky law of unintended consequences!...for now I find that
with "up" aileron, the leading edge of the aileron hits the inside
surface of the closeout...and...I do not have the required amount of
travel with "up" aileron limited to about 20 degrees.
To dig myself out of this hole, I propose to shave back a portion of
the leading edge of the aileron which is buried in the wing trailing
edge closeout and re-glass as necessary.
At this point, I'm wondering if I've been too anal retentive about
having my wing/ailerons match (?)... whether others have noticed
similar variations and let them be (?)...or whether my "fix" seems
reasonable (?). Comments Please!
Fred
A194
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fklein(at)orcasonline.com
Guest
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| Posted: Wed Sep 27, 2006 11:52 am Post subject: aileron fitting to wing |
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Lance,
Thanks for a heads up on Service Bulletin #10; after checking I find my
port wing has the aileron closeout mis-located as described. The
prescribed "fix" will be problematic since I have already applied the
reinforcement bids at the hinge points....not sure how to proceed but I
appreciate your input.
Fred
On Tuesday, September 26, 2006, at 09:29 PM, Lance Sandford wrote:
| Quote: | Fred
Did you check if your wings were part of the bodgey batch affected by
the enclosed service bulletin.
Good to hear you getting something done on your own toy for a change.
I am on light duties at the moment, pottering around with the
instrument panel. Managed to twist my knee while doing the lay-ups on
the rear bulkhead to fuselage join. The baggage bay is no place for a
6´ 2¨ oldie. Makes me very glad I did a splash mold on top of the mass
balance weight containment box etc, while I had the top off.
Regards
Lance Sandford in OZ
> Gentlemen,
>
> First, it's inspiring to read about flying experiences w/ our
> wonderful little birds...especially to one who has only recently been
> able to get down to some serious work on his XS mono kit. Care to
> take a stroll down memory lane?
>
> I've checked the archives on the subject of fitting the ailerons to
> the wing and found no previous posts which deal with the particular
> problem I've created for myself...indulge me for a moment.
>
> Fitting the starboard aileron to the wing seemed like a piece of
> cake...plenty of travel, no rubbing or snags.
>
> The port aileron has been a somewhat different story...the first
> thing I noticed after clecoing it in place was significant rubbing of
> the top surface on the trailing edge closeout. Then I noticed that
> the trailing edge of the port aileron was 1/8" short of the trailing
> tip of the wingtip, whereas the starboard aileron was 3/8" short of
> the wingtip.
>
> I also noticed that the offset between the flap closeout and the
> aileron closeout on the starboard wing was 1 inch but on the port
> wing it was 1.5 inches.
>
> The net result of these differences appeared to be that the starboard
> wing/aileron would have between 1/4 and 1/2 inch more chord that of
> the port wing. I found no references in the manual which noted this
> as a design feature; after taking numerous comparative measurements,
> it appeared that the aileron closeout and hinge line of the port wing
> was between 1/4 and 1/2 inch further aft than on the starboard wing.
> It appeared to me that a bit of trimming would equalize the wing
> area, and by moving the port aileron forward, I would reduce the
> rubbing between it and the closeout.
>
> Accordingly, I proceeded to trim (first) the lower trailing edge of
> the port wing and re-established the hinge rebates, trial fitted the
> aileron, and subsequently trimmed back the top trailing edge of the
> closeout. After remeasuring, I found I had two wing/ailerons of the
> same size.
>
> Ahh...that pesky law of unintended consequences!...for now I find
> that with "up" aileron, the leading edge of the aileron hits the
> inside surface of the closeout...and...I do not have the required
> amount of travel with "up" aileron limited to about 20 degrees.
>
> To dig myself out of this hole, I propose to shave back a portion of
> the leading edge of the aileron which is buried in the wing trailing
> edge closeout and re-glass as necessary.
>
> At this point, I'm wondering if I've been too anal retentive about
> having my wing/ailerons match (?)... whether others have noticed
> similar variations and let them be (?)...or whether my "fix" seems
> reasonable (?). Comments Please!
>
> Fred
> A194
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topglock(at)cox.net
Guest
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| Posted: Wed Sep 27, 2006 11:58 am Post subject: aileron fitting to wing |
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Fred,
The rubbing on the closeouts and limited travel will be remedied when
you bond on the top skin. You'll simply trim the closeout to fit. My
ailerons were a tad short, too. I simply trimmed the wingtip to fit.
No problems, so far...
Jeff
Baby Blue
Fred Klein wrote:
| Quote: |
Gentlemen,
First, it's inspiring to read about flying experiences w/ our
wonderful little birds...especially to one who has only recently been
able to get down to some serious work on his XS mono kit. Care to take
a stroll down memory lane?
I've checked the archives on the subject of fitting the ailerons to
the wing and found no previous posts which deal with the particular
problem I've created for myself...indulge me for a moment.
Fitting the starboard aileron to the wing seemed like a piece of
cake...plenty of travel, no rubbing or snags.
The port aileron has been a somewhat different story...the first thing
I noticed after clecoing it in place was significant rubbing of the
top surface on the trailing edge closeout. Then I noticed that the
trailing edge of the port aileron was 1/8" short of the trailing tip
of the wingtip, whereas the starboard aileron was 3/8" short of the
wingtip.
I also noticed that the offset between the flap closeout and the
aileron closeout on the starboard wing was 1 inch but on the port wing
it was 1.5 inches.
The net result of these differences appeared to be that the starboard
wing/aileron would have between 1/4 and 1/2 inch more chord that of
the port wing. I found no references in the manual which noted this as
a design feature; after taking numerous comparative measurements, it
appeared that the aileron closeout and hinge line of the port wing was
between 1/4 and 1/2 inch further aft than on the starboard wing. It
appeared to me that a bit of trimming would equalize the wing area,
and by moving the port aileron forward, I would reduce the rubbing
between it and the closeout.
Accordingly, I proceeded to trim (first) the lower trailing edge of
the port wing and re-established the hinge rebates, trial fitted the
aileron, and subsequently trimmed back the top trailing edge of the
closeout. After remeasuring, I found I had two wing/ailerons of the
same size.
Ahh...that pesky law of unintended consequences!...for now I find that
with "up" aileron, the leading edge of the aileron hits the inside
surface of the closeout...and...I do not have the required amount of
travel with "up" aileron limited to about 20 degrees.
To dig myself out of this hole, I propose to shave back a portion of
the leading edge of the aileron which is buried in the wing trailing
edge closeout and re-glass as necessary.
At this point, I'm wondering if I've been too anal retentive about
having my wing/ailerons match (?)... whether others have noticed
similar variations and let them be (?)...or whether my "fix" seems
reasonable (?). Comments Please!
Fred
A194
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fklein(at)orcasonline.com
Guest
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| Posted: Wed Sep 27, 2006 12:38 pm Post subject: aileron fitting to wing |
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Hi Jeff,
I agree that the rubbing can be handled when I bond on the top skin;
however, the travel is restricted when the leading edge of the aileron
slams into the wing/aileron closeout with the aileron in the "up"
position (with only 20 degrees of travel)...this condition won't change
with the top skin bonded on. I'm currently looking for some
knowledgeable assurance that as long as I properly balance the aileron,
the possibility of flutter will be nil IF I shave back the leading edge
of the aileron (perhaps as much as 1/2 inch) in order to allow for the
required travel.
As for the wingtip extending aft of the trailing edge of the aileron,
I'll be quite content to trim back the wingtip as you have done.
Fred
A194
On Wednesday, September 27, 2006, at 12:59 PM, Rman wrote:
| Quote: |
Fred,
The rubbing on the closeouts and limited travel will be remedied when
you bond on the top skin. You'll simply trim the closeout to fit. My
ailerons were a tad short, too. I simply trimmed the wingtip to fit.
No problems, so far...
Jeff
Baby Blue
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SPurpura(at)aol.com
Guest
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| Posted: Wed Sep 27, 2006 5:03 pm Post subject: aileron fitting to wing |
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In a message dated 9/27/2006 1:40:32 PM Pacific Daylight Time, fklein(at)orcasonline.com writes:
| Quote: | the travel is restricted when the leading edge of the aileron
slams into the wing/aileron closeout with the aileron in the "up"
position (with only 20 degrees of travel) |
Can you elaborate on this Fred,mabey your hinge point is off or would triming back the top skin or extending lower skin help?
[quote][b]
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wdaniell(at)etb.net.co
Guest
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| Posted: Wed Sep 27, 2006 5:35 pm Post subject: aileron fitting to wing |
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just a thought - could it be the ends of the screws? For which you have to drioll holes in the LE of the aileron
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of SPurpura(at)aol.com
Sent: 27 September, 2006 20:03
To: europa-list(at)matronics.com
Subject: Re: aileron fitting to wing
In a message dated 9/27/2006 1:40:32 PM Pacific Daylight Time, fklein(at)orcasonline.com writes:
| Quote: | the travel is restricted when the leading edge of the aileron
slams into the wing/aileron closeout with the aileron in the "up"
position (with only 20 degrees of travel) |
Can you elaborate on this Fred,mabey your hinge point is off or would triming back the top skin or extending lower skin help?
[quote]
[b]
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