Comment by Barron on September 3, 2011 at 11:21am

This is the type of project I was looking for.  Can wait to get more info when you start back.

Comment by Paul Marsh on September 3, 2011 at 2:33pm

Thanks again Barron.  I actually just got the quote to have all of the ribs and formers laser cut.  I'll get those parts soon and start accumulating other items as well.  Still, it's going to be a little while before I start the build itself.

Comment by Barron on September 6, 2011 at 2:59pm

No rush sir.  I am busy planning other aspects of my project !

Comment by Mustafa Moharam on October 18, 2011 at 6:55pm

good work Mr Paul , but what about the joints between wing and booms ?, did you figure out someway to make them as assembly 

 

Comment by Paul Marsh on October 19, 2011 at 5:03am

Hi Musafa,

I'm not sure if this will answer your question, but my design to attach the wing to the booms is fairly simple.  The booms themselves will be 1.25" diameter aluminum wing tubes with the larger wall thickness of those available (.049").  The cylindrical ribs that the booms will slide over will be built up from five layers of 1/4" balsa.  I'm doing it that was for two reasons: one is that 1/4" is about as thick as you can go with laser cutting (I think) and, two, it makes it easier to get the channels I need for servo wires to run through.  The wing spars will run right through these cylindrical ribs, making for a very strong connection to the wing.  I'll post another screen shot of the design, but not shown are the bolts that will attach the booms to these ribs.  Each connection will get two bolts for a total of eight bolts.  I did screw up with putting the servo channel right in the middle, so the bolts will pass through it, but I'll deal with that later.  (I already sent the design in for laser cutting.)  In any case, this makes the whole thing an assembly that can be taken apart and put back together easily for transport.

If this does not address the question, please let me know.

Thanks,
Paul

Comment by Barron on February 9, 2012 at 11:27am

how is your project going ?

Comment by Paul Marsh on February 11, 2012 at 5:08pm

Hi Barron,

I haven't made much progress.  I have a few other projects going on.  Thanks for checking in, though.

Paul

Comment by eduardo on April 2, 2012 at 5:37am

no progress Paul ??

Comment by Paul Marsh on April 4, 2012 at 5:35pm

Hi Eduardo,

I'm sorry to say that my project has not progressed.  It's on the shelf, but not abandoned.  I appreciate the follow-up, though.

Paul

Comment by John Johnson on April 5, 2012 at 10:35am

Cool project.  FYI, the photo on the first page is a Pioneer that is haning in the Smithsonian in D.C.  That is an actual airframe that I had the priviledge to fly across the U.S., the Mediterranean Sea and over Bosnia.  I had around 10 years experience operating and repairing the Pioneer.  Also, you are modeling the Option II version.  The last version was the Option II+ which had a wider fuselage that did not have the signiture round bulge around the payload area.  I would be interested in a copy your completed CAD files to produce a smaller scale version.

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