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Old 05-15-2007, 03:15 PM   #1
PaulSwany
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Default Primo Build Thread
I'm doing a build thread over on the ProBro site on my new design the Primo... I thought I share the build with some of you guys that don't get out as much...

Basically this is like a mojo with a thinner wing, longer tail moment, cap style horizontal stab, modified fuse and rounder rudder.....

So... I guess it's nothing like a mojo.... Well the wing span is the same.

I'm scratch building a lot of this one... I'll start the fuse first. There are lots of curved parts, so I'll start by making those out of 1/8" x 3/8" balsa. I wet two pieces then coated one side with wood glue to make the bends. Then I cut some blocks and shaped them to act as formers.
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Last edited by PaulSwany; 05-15-2007 at 03:38 PM.
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Old 05-15-2007, 03:18 PM   #2
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Default Re: Primo Build Thread
Here's some more fuse shots. The last three pics show my method for making curved parts.. Just use thin stock, wet it, coat it with a little wood glue and use some blocs to make a former to give it shape
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  • Click image for larger version Name: Primo 012.jpg Views: 39 Size: 745.8 KB ID: 50680 745.8 KB · Views: 39

  • Click image for larger version Name: Primo 013.jpg Views: 34 Size: 744.0 KB ID: 50681 744.0 KB · Views: 34

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  • Click image for larger version Name: Primo 017.jpg Views: 34 Size: 783.7 KB ID: 50685 783.7 KB · Views: 34

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Old 05-15-2007, 03:22 PM   #3
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Default Re: Primo Build Thread
More pics of the forming process.. I'm sure lots of folks have used this method before... Getting started on the wing. The fuse will have a 1/2" fiberglass tube so the root rib is built with a pocket to hold the tube.
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  • Click image for larger version Name: Primo 025.jpg Views: 27 Size: 724.3 KB ID: 50691 724.3 KB · Views: 27

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Old 05-15-2007, 03:26 PM   #4
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Default Re: Primo Build Thread
Building the spar with the taper before pinning it to the building board. The wing it quad tapered, so I'll use some blocks to set the spar up and a long block at the trailing edge to keep the taper correct. I'll put tabs on these in the future.
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  • Click image for larger version Name: Primo 026.jpg Views: 25 Size: 700.6 KB ID: 50693 700.6 KB · Views: 25

  • Click image for larger version Name: Primo 027.jpg Views: 27 Size: 761.6 KB ID: 50694 761.6 KB · Views: 27

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  • Click image for larger version Name: Primo 035.jpg Views: 38 Size: 733.8 KB ID: 50698 733.8 KB · Views: 38

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Old 05-15-2007, 03:28 PM   #5
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Default Re: Primo Build Thread
Wing is all sheeted and ready to go except for cutting the hatches. The last two pics show the difference between the Mojo airfoil and the Primo airfoil
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  • Click image for larger version Name: Primo 043.jpg Views: 34 Size: 756.8 KB ID: 50710 756.8 KB · Views: 34

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Old 05-15-2007, 03:35 PM   #6
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Default Re: Primo Build Thread
Building the stab. The Primo is going to have a cap style tail, so hopefully the horizontal stab will be very effective. I'm putting a 3/16" carbon tube in the trailing edge of teh stationary portion of the horizontal.... I want that stab stiff!
Attached Thumbnails

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  • Click image for larger version Name: Primo 048.jpg Views: 46 Size: 720.2 KB ID: 50715 720.2 KB · Views: 46

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Old 05-15-2007, 03:37 PM   #7
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Default Re: Primo Build Thread
All boned up....

AUW 18 oz..

She should come out just a taste over 4 lbs rtf
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  • Click image for larger version Name: Primo 056.jpg Views: 40 Size: 586.4 KB ID: 50719 586.4 KB · Views: 40

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Old 05-15-2007, 03:49 PM   #8
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Default Re: Primo Build Thread
That thing has one heck of a tail Paul.

I can't wait to hear more.
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Old 05-15-2007, 04:00 PM   #9
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Default Re: Primo Build Thread
Looking Good
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Old 05-15-2007, 04:12 PM   #10
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Default Re: Primo Build Thread
Great pics Swanyˇˇˇˇ
When do you think this plane will be ready to sell???? I really like the way you laminate the parts, I bet they are strongˇ
Saludos.
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Old 05-15-2007, 04:13 PM   #11
PaulSwany
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Default Re: Primo Build Thread
I'm hoping to have it ready for the Memphis ProBro... And if I like the way it flys, I'll work on getting kits out... Will probably take 4 or 5 weeks after memphis to dial in the kit..
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Old 05-16-2007, 12:12 AM   #12
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Default Re: Primo Build Thread
I just saw pics of it covered! Very bad ass! Maybe Pauly will drop in and post them soon. Looks like a nice one. Can't wait for a flight report. Great job as usual Paul!

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Old 05-16-2007, 12:23 AM   #13
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Default Re: Primo Build Thread
Sweet!!!!
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Old 05-16-2007, 08:27 AM   #14
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Default Re: Primo Build Thread
Quote: Originally Posted by Johnny MoJo
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I just saw pics of it covered! Very bad ass! Maybe Pauly will drop in and post them soon. Looks like a nice one. Can't wait for a flight report. Great job as usual Paul!

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Old 05-16-2007, 09:31 AM   #15
PaulSwany
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Default Re: Primo Build Thread
Got 'er covered.... Mounted the motor (webra 50) and got some gear in it too... Just a few more odds and ends.
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