Message #623

Date: Oct 01 2000 09:58:10 EDT
From: "MotorcycleShopper.com" <mshopper@cfl.rr.com>
Subject: Scarf Joints

Hi guys:

I've been making practice scarf joints without a lot of success.

First I made a jig where I placed a belt sander upside-down on a bench and 
built a table and guide fence on it. That did not yield acceptable results 
as I had no way to keep constant pressure on the plywood.

I then tried scarfing by hand with the belt sander and that test piece 
looked somewhat better, but still unacceptable to me.

Anyhow, I came across the following links and am passing them along in case 
some of you are also somewhat frustrated with scarfing plywood.

http://www.boat-links.com/scarph_bevels.html

http://www.clcboats.com/truthaboutscarfs.html

http://www.glen-l.com/supplies/pxman-apscarf.html

Also of interest (I think) is the following quote I saw in the Mirage 
Aircraft Builder Newsletter 
http://www.mirageaircraft.com/newsletter-august-2000.htm which states:
"It is further recommended that gluing surfaces should be machined smooth 
and true with planers, jointers, or special miter
saws. In any case, the FAA says that 'Sandpaper must never be used to 
smooth softwood surfaces that are to be glued.'
(AC 43.13-1A)."

Anyway, your thoughts and/or tips on how to make good, clean scarf joints 
would be welcome. I bought the EAA book and video on woodworking but their 
demonstration on making a scarf joint was brief and would require one to 
purchase a big piece of equipment. In my case that's out of the question as 
the "Minister of Finance" has enacted laws that prevent me from doing so.

BTW, if any of you know of someone who's thinking about building a RANS 
S-16 Shekari http://www.rans.com/images/S-16_side_pants.jpg pass along my 
email address as I have a control surfaces kit completely assembled 
(includes flaps, ailerons, elevators and the rudder). This can save someone 
a couple months worth of work. I'm asking $2,500 plus shipping or will 
consider trading for anything Fly Baby related of an equal value. 
Workmanship is top notch.

Luis Hernandez Jr.
CEO
Payne Corporation

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