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Jan 03, 2018, 07:53 AM
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Build Log

Super Ximango 1/4 scale (440cm)


Hello folks!

My name is Charles and I live in Brasília, the federal Capital of Brasil!

I am an airline pilot, flying the A320 Airbus family!

In 2018, I will be completing 10 years of my first flight! It was on a Super Ximango motor glider. A plane built by the brasilian Aeromot, based on the french Fournier RF-10.

Before become I pilot, I used to build electric models, mainly using fiberglass. But because of all the studying and high load of work, the builds had to be halted!

But recently, I moved to Brasília where I am based now, and finally have a little bit more of spare time. So, I decided to build from scratch the Ximango!

The scale is 1/4, so the wingspan will be 440cm and fuselage length about 205cm.

I started the project build a 3d model on Blender(blender.org) and printed the sections to cut the MDF to make the plug. Them, I will make the molds.

The model will be built using composite materials and I hope to finish this saga in less than 2 years!

I created a page in Portuguese to post the building process to my friends watch: www.facebook.com/tecnicasdemodelismo.

This is a movie showing the beginning of the construction:
Início da construção do Ximango #01 (2 min 46 sec)


Any comments and help will be very appreciated.

Charles
Last edited by charlespereira; Aug 06, 2018 at 09:29 PM. Reason: Changed from Discussion to Build log
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Jan 05, 2018, 08:34 AM
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charlespereira's Avatar

Strip planking


Continuing with the build, I cut the sections of the fuselage and glued on the longitudinal plane.

To get everything as straight as possible, I clamped the fuselage on two sheets of MDF, that were cut with a CNC machine.

And now, the strip planking started. I am using a 4mm plywood.


Chapeamento do Plug da Fuselagem - Construção do Super Ximango #02 (2 min 33 sec)


Charles Pereira
www.facebook.com/tecnicasdemodelismo
Last edited by charlespereira; Feb 25, 2018 at 09:26 PM. Reason: Video attached
Jan 08, 2018, 04:15 PM
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Strip planking


Hello!

I removed the half of the fuselage from the template and continued the plating with plywood strips.

Then, I used a laser level to check if the longitudinal axis alignment is correct and I think it's fine.

It will still take many hours to finish closing the entire fuselage, but by now, you can see the size that will be. I'm excited about the result!

Next step will be fill in the spaces with poliurethane foam.
Jan 16, 2018, 10:31 AM
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turbonut's Avatar
Nice..its looking good
Latest blog entry: In flight
Jan 22, 2018, 01:09 PM
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charlespereira's Avatar
Hello guys!

In recent days I got access to photograph and make measurements of the Super Ximango that is in the air club of Brasília, in Luziânia. It's about an hour from my house.

Now with the measurements in hand, I can make the model much more like the real.

These are some of the photos I took.

I also put in the messages above a link to the videos I made. They are narrated in Portuguese, but I did subtitles in English and I hope these videos can be useful.

I'm trying hard to document all the building in videos. It may have some delay in publishing because editing the videos gives a lot of work.
Feb 11, 2018, 03:29 AM
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charlespereira's Avatar
And the sanding work continues.

The shape is almost ready. I am waiting for the resin and fiberglass to start making the details.
Feb 25, 2018, 09:22 PM
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charlespereira's Avatar
I believe that the great part of defining the shape is now done. So I applied a thick layer os resin with a yellow pigment.

That will help me control the sanding to smooth the surface. Also, a layer os fiberglass was applied to strenght the whole thing.

The next step will be put some more resin with another color and start sending again.

Controle de Lixamento da Fuselagem - Construção do Ximango #4 (7 min 1 sec)


Charles Pereira
www.facebook.com/tecnicasdemodelismo
Last edited by charlespereira; Mar 04, 2018 at 05:16 PM.
Mar 10, 2018, 08:20 AM
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Yesterday I applied the first coat of PU primer. Now it is easier to smooth the surface, since it is the same color. I believe that at least two or three coats will be needed.
May 02, 2018, 11:15 AM
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Hello folks!

I am sorry for not post anything in the last weeks! My job has been demanding.

But I will give a quick update.

A thick layer of primer have been applied on the fuselage.

Also, I have started sculpting the cowl using expansive foam. Yesterday I applied a layer of fiberglass and I am waiting it to cure.
May 24, 2018, 10:57 AM
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charlespereira's Avatar
Hello!

I have started to design a jig to help on building the horizontal stabilizer and elevator.

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Description:

The idea is to build the jig using MDF and fill the gaps with foam and fiberglass. That would give me a sturdy template to build the model from it.

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The stabilizer and elevator will be a single piece, using Kevlar for the hinges.

The profile is NACA 63008.

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The wingspan is 93,5cm. That´s big. That is the why I want to build this jig to help me on keeping everything right.

--
Charles Pereira
May 29, 2018, 07:51 PM
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Hello!

The work on the engine cowling is almost done!

After a layer of PU, I used a laser level to trace the cutting line to divide the upper and bottom parts.

I just need to make some details and then will be ready to start to making the molds.
Jun 05, 2018, 11:18 AM
Registered User
Hey Charles, the Ximango is looking great. I favor motor gliders, I have been flying a 1/3 Super Dimona and am working on a 1/3 ASK-14, my next project will be a Ryson Cloudster. Regards, Dennis
Latest blog entry: Testing the blog page
Jun 05, 2018, 07:14 PM
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AMBeck's Avatar
Very nice work!

Speaking of Brazilian sailplanes, does documentation still exist on the Urupema standard class sailplane? One flew in the 1970 World Championships and I have thought it would be a good 1/5 or 1/4 scale ship. I tried to find information when I was in Sao Jose dos Campos several years ago, but work got in the way.

Good luck with the Ximango project!
Jun 06, 2018, 01:05 PM
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Quote:
Originally Posted by AMBeck
Very nice work!

Speaking of Brazilian sailplanes, does documentation still exist on the Urupema standard class sailplane? One flew in the 1970 World Championships and I have thought it would be a good 1/5 or 1/4 scale ship. I tried to find information when I was in Sao Jose dos Campos several years ago, but work got in the way.

Good luck with the Ximango project!
Thanks!

About the Urupema, or EMB 400, I don't have any drawings, but I will try to find any. For now, maybe this will help you:

http://www.j2mcl-planeurs.net/dbj2mc....php?code=2542

Cheers!
Jun 06, 2018, 01:08 PM
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charlespereira's Avatar
Quote:
Originally Posted by s2000
Hey Charles, the Ximango is looking great. I favor motor gliders, I have been flying a 1/3 Super Dimona and am working on a 1/3 ASK-14, my next project will be a Ryson Cloudster. Regards, Dennis
Thanks Dennis!

Do you have any links showing your models?


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