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Old Jun 13, 2004, 05:07 AM
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Wing repair








































































































































































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Last edited by yclui; Jun 13, 2004 at 05:10 AM.
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Old Jun 13, 2004, 09:15 AM
Registered User
Laguna Beach, CA
Joined Mar 2003
223 Posts
Impressive tutorial!
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Old Jun 13, 2004, 09:53 AM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,693 Posts
Pretty slick repair job; I bet you'll be happy to get the MiraJ back up.
Good luck with whats left.
Target
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Old Jun 13, 2004, 11:01 AM
Landings are not optional
DeuceTrinal's Avatar
Van Nuys, CA
Joined Sep 2003
1,805 Posts
Pretty impressive! That kind of damange would have had me looking for a new wing.
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Old Jun 13, 2004, 11:05 AM
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dutchydawg1's Avatar
Nor. Cal.
Joined Jan 2004
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unbelievable !!!...... let me guess, your either a "plastic surgeon" or a "rocket scientist" ? increadable repair !!!
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Old Jun 13, 2004, 04:02 PM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,693 Posts
hi, yclui-
Where did you get the thermal switch that you are using to turn on and off your heat source, and how much did it cost you?
Right now, I use an electric heater with it's own thermostat, but it doesn't work as reliably as I would like.

Thanks in advance, Target
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Old Jun 13, 2004, 07:21 PM
Free as a bird now.
Brian Courtice's Avatar
United States, FL, Punta Gorda
Joined May 2002
6,607 Posts
Yep. 99.9 percent of the modelers I know would have put that wing in the trash and bought a new one. I would have never even considered trying to repair it.

You did an excellent job. There is more engineering and high tech techniques in that repair than there is in any of the planes I've built! I build my planes by sheeting foam cores with wood and contact cement. Then I glue the wing and balsa tail to a fiberglass fuse. Paint it, hook up the radio. Done. I love to see all that carbon and mylars and vaccuum bagging and hot boxing stuff being done. Very cool.

Thanks for posting such a great photo series!
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Old Jun 13, 2004, 07:46 PM
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Pegasus's Avatar
Austin, Tx
Joined Nov 2003
1,052 Posts
What is the "hot boxing" for ?

Incredible workmanship!!

Steven
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Old Jun 13, 2004, 08:53 PM
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Laguna Beach, CA
Joined Mar 2003
223 Posts
Cures the epoxy harder when you heat cure it at bout 120 degrees F
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Old Jun 13, 2004, 11:47 PM
plane obsessed
Cody WIlson's Avatar
Denver, CO.
Joined Nov 2003
3,885 Posts
I Can Feel My Head Expanding........
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Old Jun 13, 2004, 11:53 PM
It could happen...
InTheLift's Avatar
Torrance, California
Joined Jan 2004
7,537 Posts
Wow!

Truly amazing.
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Old Jun 13, 2004, 11:55 PM
All work and no play
legliderman's Avatar
Lucas, KS
Joined Apr 2003
2,062 Posts
WOW!! Doctor YCLIU, your needed in the OR!
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Old Jun 14, 2004, 10:40 AM
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Guys,

Thanks for the compliments. Just before losing it’s wing, the Miraj was racing with a Nemesis over the slope and the two planes collided almost head on in the air. The first picture is the re-construction of that moment. Much to our surprise, the damage received by the Nemesis was far less sever. That made us wonder whether carbon is really tougher than glass.

This is in fact my first vacuum bagging “project”. I have always wanted to give vacuum bagging a try but making a wing from scratch is kind of too challenging for me so I decided to experiment with my friend’s broken wing first. Most of the techniques shown in the pictures were learned from Phil Barn’s excellent vacuum bagging video http://www.paonline.com/hayman/PAGE2.htm which I highly recommend to those who are interested in this special fabrication process .


Hi Target,

I got that thermal switch from an electrical supply store. My original plan was to use a thermostat for water heater but the store keeper suggested that I should use an electronic thermal switch as it is more sensitive. It has cost me about US$30.

Cheers,

Y C Lui
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Old Jun 14, 2004, 05:38 PM
It could happen...
InTheLift's Avatar
Torrance, California
Joined Jan 2004
7,537 Posts
Quote:
Originally Posted by yclui
but making a wing from scratch is kind of too challenging for me
WHAT?!? Surely you jest!?!!?!
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Old Jun 16, 2004, 09:41 AM
Detail Freak
target's Avatar
Harbor City, CA
Joined Oct 2003
21,693 Posts
yclui,
I kinda agree with glenn(InTheLift), about the only thing you need to make your own wings is a setup to cut the cores, and you'll be there. I encourage you to do this.

Thank you for the info about the thermal sensor, I'll look into it.

Good luck(on making your own wings),
Target
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