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darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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 Posted: Sun Oct 08, 2006 7:21 pm Post subject: Finger Strainer access on Series 7? |
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What has everybody done for access to the finger strainers on the series 7? I have attached a pic of the area in question for all to comment on. I can't figure out how you would ever be able to remove the strainer if it became clogged being that the elbow is on the outboard side of rib #1. I have changed the factory elbows for AN fittings but the concept is the same. Without making some sort of access hatch and a section of Rib #1 removable, I don't see how it is to be done? Can anyone enlighten me? If so, pics of your setup would be worth a million words.
Thanks,
Darin Hawkes
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| Description: |
| You can see here that I needed to remove a slight bit of the cap strip in order to attach the hose. What you don't see is that I only have about 1/8" lateral clearance to rib #1 (not nearly enough to unscrew the elbow or the strainer). |
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ddsyverson(at)comcast.net
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| Posted: Mon Oct 09, 2006 5:52 pm Post subject: Finger Strainer access on Series 7? |
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Darin,
I don't know what others have done; however, I made a rectangular aluminum
grommet (similar in configuration to the forward lift strut bracket grommet)
to glue on the back of the fabric for an access opening which will get an
aluminum, screwed down cover plate.
This idea is more for easy access for the fuel hose connection & clamp than
anything else; but, if I ever get stuck in the future and need to pull out
the strainers I won't have to chop up the fabric to get at it. I did not cut
any of the lower rib cap - again, if I have to (and I hope I don't) I will
modify the rib cap at at the time.
The finger strainers are pretty coarse; and, I wouldn't expect them to get
clogged up - they look more like something to keep the big lumps and chunks
from getting into the line than anything to do any serious filtering (that is
for the in line filters). To be sure, I did a thorough job of cleaning the
tanks of fiberglass crud - and filtered the rinse water till 5 rinses came
out without catching any stuff.
Sincerely,
Dave S
St Paul, MN
On Sunday 08 October 2006 10:21 pm, darinh wrote:
| Quote: |
What has everybody done for access to the finger strainers on the series 7?
I have attached a pic of the area in question for all to comment on. I
can't figure out how you would ever be able to remove the strainer if it
became clogged being that the elbow is on the outboard side of rib #1. I
have changed the factory elbows for AN fittings but the concept is the
same. Without making some sort of access hatch and a section of Rib #1
removable, I don't see how it is to be done? Can anyone enlighten me? If
so, pics of your setup would be worth a million words.
Thanks,
Darin Hawkes
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=66660#66660
Attachments:
http://forums.matronics.com//files/dscf1585_medium_784.jpg
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gjfpilot(at)yahoo.com
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| Posted: Mon Oct 09, 2006 8:05 pm Post subject: Finger Strainer access on Series 7? |
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Darin,
I'm not sure if the Classic IV fuel tank setup is
the same as your Series 7 but here is what I did: I
made an aluminum plate with an opening to get a wrench
on the elbow pipe fitting. I used an air operated
flanger (for car patch panels) to make the recess in
the aluminun so the cover plate would fit flush. I am
still building so I can't say how it will work in the
future but I should be able to get the strainers out.
Grant Fluent
Classic IV 912ULS
--- darinh <gerns25(at)netscape.net> wrote:
| Quote: |
<gerns25(at)netscape.net>
What has everybody done for access to the finger
strainers on the series 7? I have attached a pic of
the area in question for all to comment on. I can't
figure out how you would ever be able to remove the
strainer if it became clogged being that the elbow
is on the outboard side of rib #1. I have changed
the factory elbows for AN fittings but the concept
is the same. Without making some sort of access
hatch and a section of Rib #1 removable, I don't see
how it is to be done? Can anyone enlighten me? If
so, pics of your setup would be worth a million
words.
Thanks,
Darin Hawkes
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=66660#66660
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n981ms(at)yahoo.com
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| Posted: Tue Oct 10, 2006 3:54 am Post subject: Finger Strainer access on Series 7? |
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On my S6 I notched the lower cap strip of the butt rib and put in a standard round inspection plate into the fabric. About 400 hours flying and I had a leak from the fitting. I still had to notch the cap strip some more but was glad I planned for the access.
Maxwell
S6/TD/IO240
darinh <gerns25(at)netscape.net> wrote:
[quote]--> Kitfox-List message posted by: "darinh"
What has everybody done for access to the finger strainers on the series 7? I have attached a pic of the area in question for all to comment on. I can't figure out how you would ever be able to remove the strainer if it became clogged being that the elbow is on the outboard side of rib #1. I have changed the factory elbows for AN fittings but the concept is the same. Without making some sort of [quote][b]
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darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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| Posted: Wed Oct 18, 2006 7:22 pm Post subject: Re: Finger Strainer access on Series 7? |
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I have finally finished the mod for accessing my finger strainers...similar to what Grant did but... As you can see, I had to cut out a section of the rib because I am using AN hardware straight out of the strainer and there was no way to get it out with the section of rib in place (the AN elbows are significantly longer than the elbow supplied with the kit). However, as you can see, the rib will be glued to the access flange and that will provide the rigidity in the rib. This rib does not carry any structural loads to speak of so not a problem. The fabric will be glued to the flange around the access panel and this will allow for complete and very easy access to the strainer, elbow and connection to the fuel hose (which is Aeroquip stainless AQP hose and fittings...they look awesome!). The access panels took a bit of time as I had to make a plug and fiberglass mold and then lay up the panels. They turned out better than I could have hoped and fit excellent! Anyway, though you guys might be interested in what I ended up doing.
Darin
Series 7
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Fri Oct 20, 2006 7:11 pm Post subject: Finger Strainer access on Series 7? |
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At 08:22 PM 10/18/2006, you wrote:
| Quote: | As you can see, I had to cut out a section of the rib because I am using
AN hardware straight out of the strainer and there was no way to get it
out with the section of rib in place (the AN elbows are significantly
longer than the elbow supplied with the kit). However, as you can see,
the rib will be glued to the access flange and that will provide the
rigidity in the rib.
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Hi Darin,
I'm not sure I like your rib removal. I'm afraid the remaining
section will fatigue with time and I don't think that little bit of flat
aluminum is going to offer much in the way of resistance to compression or
side bending loads. (The inboard ribs live in an high fatigue environment
due to prop wash. Is there any chance you could rivet / bond some aluminum
angle or T to the inside of the aluminum frame? Or you could fasten
aluminum angle to the remaining rip pieces fore and aft using floating nuts.
Guy Buchanan
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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| Posted: Fri Oct 20, 2006 8:38 pm Post subject: Re: Finger Strainer access on Series 7? |
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Guy,
Actually, this picture does not show it but yes, I have a piece of aluminum angle that is fastened to the rib on both sides. I cannot make it permanent as that will not allow for removal of the elbow and strainer. I spent a bunch of time thinking about this setup and did actually run some calcs on the rib (I am a civil engineer with a structures background) with pretty much every load combination I could think of (i.e. side, compression, tension, suction, etc.) and there are no issues. If you really think about it, you have a very rigid tank that acts as a 3' wide rib in this area. After doing the calcs, I am convinced that this rib #1 is primarily to provide a finished root to the wing and to allow for a convenient location for attaching the fabric. It sees no loads to speak of other than the side loads from the fabric and these loads are transfered to the tank when the small sections of wood stringer are glued in place. Thanks for the comments though, I appreciate a second eye to catch anything I may have missed.
Darin
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Sat Oct 21, 2006 6:53 am Post subject: Finger Strainer access on Series 7? |
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At 09:38 PM 10/20/2006, you wrote:
| Quote: | I spent a bunch of time thinking about this setup and did actually run
some calcs on the rib (I am a civil engineer with a structures background)
with pretty much every load combination I could think of (i.e. side,
compression, tension, suction, etc.) and there are no issues.
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Good. It's always difficult to tell, via the list, when someone's wandered off.
| Quote: | If you really think about it, you have a very rigid tank that acts as a 3'
wide rib in this area. After doing the calcs, I am convinced that this
rib #1 is primarily to provide a finished root to the wing and to allow
for a convenient location for attaching the fabric.
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I agree rib#1 is generally doing little because the fuselage structure
places the two spars. Other than that it holds the end of the fabric with a
lot of help from the tank. I suspect it loads more when you fold the wings,
(especially with fuel in the tanks,) but that's why I built a support to
unload it during storage and transit.
PS. Your work looked excellent. I can't wait to see the finished product.
Guy Buchanan
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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| Posted: Sat Oct 21, 2006 10:40 am Post subject: Re: Finger Strainer access on Series 7? |
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Guy,
Thanks for the compliments...I can't wait to see the finished product as well...actually, I can't wait to fly the finished product! Sometimes it seems so far off. Oh well, just keep on building...
Darin
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