Thumb Wing Glider - Alula-ish DIY Glider - RC Groups
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Sep 17, 2009, 03:34 PM
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Build Log

Thumb Wing Glider - Alula-ish DIY Glider


Hello guys,
I just thought I should share the glider i'm building, based on Alula, I owned one but it's almost ready to retire, and I dont want to spend another $80+ for a new one. I thought of making one out of foam and parts laying around to save cost. So, let's just call this one a "Thumb Wing" Glider, If you know what Alula means, you know what a thumb wing is. I thought of making a SAL (non powered), and Electric version.

Uploaded are drawings, templates and some photos... I'll be uploading more and keep you guys posted of the progress.

Tell me what you guys think.

-rcpinoy
Last edited by rcpinoy; Sep 22, 2009 at 01:38 PM.
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Sep 17, 2009, 08:28 PM
If it wasn't for the foam
Rcpinoy, nice job on the illustrations. I was obsessed with alula clones for a while. You'll find my info here: https://www.rcgroups.com/forums/showthread.php?t=627593

My first one was a sloppy build, but flew great. My second one was a precision build (for me anyway) and flew like crap. The issue, which I never resolved, was extreme vibration on the elevons at high speeds, which severely limited the launch. I even replaced the elevons with stiff balsa - no improvement.

I've since moved onto other things. Best of luck to you and your project! I'll be checking back to see your progress!
Sep 17, 2009, 09:05 PM
Registered User
http://alain.zutter.free.fr/Ailes/salAZ/index.html
Sep 17, 2009, 09:35 PM
If it wasn't for the foam
Quote:
Originally Posted by dean_85
Yep, That's what got me started!
Sep 18, 2009, 12:02 AM
Registered User
rcpinoy, nice re-design. Did you make an airfoil for the wing?

Kevin.
Sep 18, 2009, 12:29 PM
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j2m2t2's Avatar
Any idea for CG?
Sep 20, 2009, 05:51 PM
"Watch out for...CRUNCH!!
anything more? I printed out the plans and have the wings cut out.
Sep 20, 2009, 06:09 PM
Registered User
j2m2t2's Avatar
My progress.
Sep 20, 2009, 06:14 PM
"Watch out for...CRUNCH!!
How is the tail attached? Its hard to tell by the pictures. Thanks
Sep 20, 2009, 06:16 PM
Registered User
j2m2t2's Avatar
Not attached yet. Not sure what to do with it yet.
Sep 20, 2009, 06:36 PM
"Watch out for...CRUNCH!!
Well in the 3d model it looks like its part of the fuse, sandwiched in between the outer layers of the fuse.
Sep 20, 2009, 10:47 PM
Registered User
j2m2t2's Avatar
OK here it is ready to go. Just under 6oz with 2s 460. KFm-2

CG appears to be 3inches from leading edge. Ill find out at maiden for sure.

Thanks for the plans.
Sep 20, 2009, 10:53 PM
"Watch out for...CRUNCH!!
Cool! I like the paint job. Are you going to launch it SAL or by a bungee or by some other method?
Sep 20, 2009, 10:59 PM
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j2m2t2's Avatar
Thanks
Im going SAL.
First plane of this type. I will be looking for slopes also.
Sep 20, 2009, 11:45 PM
Registered User
Hi j2m2t2, wow man! you are quick...i'm currently travelling but will post my progress in a few moment....

CG is 30mm from LE, for a start... you can increase it as you get comfortable.

Quote:
Originally Posted by j2m2t2
Any idea for CG?


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