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Old Feb 16, 2009, 11:08 PM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,133 Posts
Wow,Geode!
How could I miss this thread.Awesome!
You are lucky one with CNC cutter,in my world everything done by hands.
Subscribed.
Yuri.
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Old Feb 18, 2009, 12:34 AM
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Geode's Avatar
San Jose, CA
Joined Jan 2007
795 Posts
Hi Yuri, You're a very good builder to create your glider with hand.

The failure rate of my hand cut wing core is just too high. In the long run, CNC foam cutter is a better investment for me.

And I don't have to inhale the fumes as much .......

Some more foam core cut .....
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Old Feb 18, 2009, 05:59 AM
TEAM OZSKUNKWORX
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KORUMBURRA IN THE BOONDOCS
Joined Jan 2006
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Geode great build on an interesting project.

Shane
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Old Feb 18, 2009, 07:26 AM
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USA, CT, Fairfield
Joined Jul 2004
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Wow, those are some thin wings! Have you said how you will construct them?
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Old Feb 18, 2009, 09:59 AM
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Geode's Avatar
San Jose, CA
Joined Jan 2007
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Looks like conventional tape/covering is not going to work for this thin MG06 airfoil.

Will be doing vacuum bagging EPP instead.

I was thinking about CF spar with 1.5oz FG. After cutting the wing, I think I need to beef up the layup a little bit. Especially for the front wing which also serves as landing gear.

May be adding more CF and additional Kevlar doubler 1 inch after LE, so I can have a soft LE (1.5 oz FG) and stiffer wing and aileron (1.5 oz FG+Kevlar). Let me know if you think this scheme will work or not. Thanks in advance.

Geode
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Old Feb 18, 2009, 10:18 AM
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Geode's Avatar
San Jose, CA
Joined Jan 2007
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Vacuum bagging EPP

BTW, here is an example of bagged EPP vertical tail with 1.5 oz FG and CF tow.

Almost as smooth as mylar, stiffer and still bounce back after compression.
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Old Feb 18, 2009, 10:49 AM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,133 Posts
Here is a technik I learned how to finish EPP fuses,You probably know it Yourself.
Sand as good as You can ,fill with Light Spackle putty/Home Depot/dry and sand again.Then spray 3M 77 light and cover with 3/4 oz cloth.
Soak this with Thin CA,/drops from a bottle/then dry,fine sand and paint.
I can finish a fuse in one hour from scratch.Quality is amaizing and smooth like molded .Does not gain any weight.Feels like an egg shell.
I did even a set of small wings once,but You have to be careful and secure wings before spreading CA as CA warps wing while drying.
Yuri.
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Old Feb 18, 2009, 11:57 AM
3D Toy Designer
MicroRotors's Avatar
USA, CA, Hesperia
Joined May 2001
4,510 Posts
Holy Mackerel,

You are haulin-butt on this build!

Bill
Envy of your speed ....
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Old Feb 18, 2009, 01:08 PM
Lover of fast slope gliders!
glasairIII's Avatar
United States, AZ, Goodyear
Joined Apr 2004
549 Posts
Two words. "new stuff" Plenty of torsional strength.
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Old Feb 18, 2009, 09:22 PM
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Geode's Avatar
San Jose, CA
Joined Jan 2007
795 Posts
Quote:
Originally Posted by Dbox
Here is a technik I learned how to finish EPP fuses,You probably know it Yourself.
Sand as good as You can ,fill with Light Spackle putty/Home Depot/dry and sand again.Then spray 3M 77 light and cover with 3/4 oz cloth.
Soak this with Thin CA,/drops from a bottle/then dry,fine sand and paint.
I can finish a fuse in one hour from scratch.Quality is amaizing and smooth like molded .Does not gain any weight.Feels like an egg shell.
I did even a set of small wings once,but You have to be careful and secure wings before spreading CA as CA warps wing while drying.
Yuri.
Thanks for the info. I was scratching my head to decide if I want to bag the fuselage like the wing. Looks like I have an alternative.

I probably will do just like what you did except using epoxy instead of CA. Is that fuse for your scratch build Alula? Look very sweet.

Geode
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Old Feb 18, 2009, 09:23 PM
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Geode's Avatar
San Jose, CA
Joined Jan 2007
795 Posts
Quote:
Originally Posted by MicroRotors
Holy Mackerel,

You are haulin-butt on this build!

Bill
Envy of your speed ....
It's suppose to be a Quickie. Isn't it?
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Old Feb 18, 2009, 09:24 PM
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San Jose, CA
Joined Jan 2007
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Quote:
Originally Posted by glasairIII
Two words. "new stuff" Plenty of torsional strength.
Like to get some NS to try it out someday. Thanks.

Geode
still have 100 x 50 ft2 of FG to digest.
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Old Feb 18, 2009, 09:26 PM
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San Jose, CA
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Some desk top test fly ......
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Old Feb 18, 2009, 11:43 PM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,133 Posts
Goede,just try a small piece of EPP foam with CA /on fresh air/.I bet You are going to love it better ,cause there in not as much weight as with resin and instant results./This is Quickie ,right ? /
No this fuse from Orbus I am finishing mold for Alulas fuse next week.Being working too much lately.
Yuri
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