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brothapig(at)HOTMAIL.COM
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 Posted: Mon Sep 01, 2008 9:57 am Post subject: Problems with riveting the 701 spars... |
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I finally made the jump and started to rivet my wing spars for my 701. All seemed to be going well C and I've got about 6 rivets in one spar. I started from the center C all rivets look good C but when I look at my spar from the end C it is starting to bend in towards the formed side of the rivet. I can tell that it is bending at the rivet locations. It is really noticeable C and I hesitate to go any further until I figure out why.
Does anyone have any ideas as to why my spars are starting to bend in? I shimmed everything straight before I set any of the rivets (down to 1mm). You can see the blocks in the pictures. Any insight would be helpful.
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rjscep(at)yahoo.com
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| Posted: Mon Sep 01, 2008 11:29 am Post subject: Problems with riveting the 701 spars... |
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| Quote: | Ryan, I laid my spars flat on the table and I back riveted the rivets
by hitting the end of the rivet with the rivet gun. I made a hole inside
of a flat piece of bar stock and set the rivet head inside. Some of the
rivets I had to redo, but most all of them came out ok. Specially when
you have to rivet the doublers.. Good luck, RS
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--- On Mon, 9/1/08, Ryan Vechinski <brothapig(at)HOTMAIL.COM> wrote:
| Quote: | From: Ryan Vechinski <brothapig(at)HOTMAIL.COM>
Subject: Problems with riveting the 701 spars...
To: "zenith-list(at)matronics.com" <zenith-list(at)matronics.com>
Date: Monday, September 1, 2008, 6:56 PM
I finally made the jump and started to rivet my wing spars
for my 701. All seemed to be going well, and I've got
about 6 rivets in one spar. I started from the center, all
rivets look good, but when I look at my spar from the end,
it is starting to bend in towards the formed side of the
rivet. I can tell that it is bending at the rivet
locations. It is really noticeable, and I hesitate to go
any further until I figure out why.
Does anyone have any ideas as to why my spars are starting
to bend in? I shimmed everything straight before I set any
of the rivets (down to 1mm). You can see the blocks in the
pictures. Any insight would be helpful.
|
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maarten versteeg
Joined: 15 May 2007
Posts: 37
Location: San Antonio
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| Posted: Tue Sep 02, 2008 12:09 pm Post subject: Problems with riveting the 701 spars... |
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Hello Ryan,
I did something similar and the spars came out straight.
I took one of the rivet squeezer cups (smooth chromed) and
drilled a matching hole in a counterweight steel plate.
Then the spar laying horizontal supported in a number of
places with the rivet head in the cup. I actually used a
regular hammer (with a polished surface) to hammer a shop
head on the back of the rivets. I only had a few (~5) cases
where this failed when the rivet head jumped out of the cup
and was laying on the edge of the cup when I hit the rivet.
Besides that the process worked very well and the rivets
came out very reproducible.
Maarten, plans building 601xl,
nearly done with the second wing.
| Quote: | Time: 12:29:30 PM PST US
From: ROBERT SCEPPA <rjscep(at)yahoo.com>
Subject: Re: Problems with riveting the 701 spars...
> Ryan, I laid my spars flat on the table and I back riveted the rivets
> by hitting the end of the rivet with the rivet gun. I made a hole inside
> of a flat piece of bar stock and set the rivet head inside. Some of the
> rivets I had to redo, but most all of them came out ok. Specially when
> you have to rivet the doublers.. Good luck, RS
--- On Mon, 9/1/08, Ryan Vechinski <brothapig(at)HOTMAIL.COM> wrote:
> From: Ryan Vechinski <brothapig(at)HOTMAIL.COM>
> Subject: Problems with riveting the 701 spars...
> To: "zenith-list(at)matronics.com" <zenith-list(at)matronics.com>
> Date: Monday, September 1, 2008, 6:56 PM
> I finally made the jump and started to rivet my wing spars
> for my 701. All seemed to be going well, and I've got
> about 6 rivets in one spar. I started from the center, all
> rivets look good, but when I look at my spar from the end,
> it is starting to bend in towards the formed side of the
> rivet. I can tell that it is bending at the rivet
> locations. It is really noticeable, and I hesitate to go
> any further until I figure out why. Does anyone have any ideas as to why my spars are starting
> to bend in? I shimmed everything straight before I set any
> of the rivets (down to 1mm). You can see the blocks in the
> pictures. Any insight would be helpful.
|
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_________________
Maarten Versteeg
601XL scratch building wings |
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Wed Sep 03, 2008 4:44 pm Post subject: Re: Problems with riveting the 701 spars... |
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Ryan,
I used a small arbor press and placed rivet tools from one of the squeezers in line with each other by machining some pieces to hold them. A piece of masking tape to hold the rivet head in place and just set it against the bottom cupped rivet face and close up the press. Notice the piece of rubber around the upper rivet face, that helps keep all the metals together before the upper face touches the rivet to for the shop head.
Here is a tiny url to my kitlog site around 10/30/2006 with pictures of what I am talking about.
http://tinyurl.com/68a5q7
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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/ |
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