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Jun 13, 2004, 05:07 AM
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Wing repair









































































































































































Last edited by yclui; Jun 13, 2004 at 05:10 AM.
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Jun 13, 2004, 09:15 AM
Registered User
Impressive tutorial!
Jun 13, 2004, 09:53 AM
Detail Freak
target's Avatar
Pretty slick repair job; I bet you'll be happy to get the MiraJ back up.
Good luck with whats left.
Target
Jun 13, 2004, 11:01 AM
Landings are not optional
DeuceTrinal's Avatar
Pretty impressive! That kind of damange would have had me looking for a new wing.
Jun 13, 2004, 11:05 AM
Registered User
dutchydawg1's Avatar
unbelievable !!!...... let me guess, your either a "plastic surgeon" or a "rocket scientist" ? increadable repair !!!
Jun 13, 2004, 04:02 PM
Detail Freak
target's Avatar
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
Jun 13, 2004, 07:21 PM
Free as a bird now.
Brian Courtice's Avatar
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!
Jun 13, 2004, 07:46 PM
Registered User
Pegasus's Avatar
What is the "hot boxing" for ?

Incredible workmanship!!

Steven
Jun 13, 2004, 08:53 PM
Registered User
Cures the epoxy harder when you heat cure it at bout 120 degrees F
Jun 13, 2004, 11:47 PM
plane obsessed
Cody WIlson's Avatar
I Can Feel My Head Expanding........
Jun 13, 2004, 11:53 PM
It could happen...
InTheLift's Avatar
Wow!

Truly amazing.
Jun 13, 2004, 11:55 PM
All work and no play
legliderman's Avatar
WOW!! Doctor YCLIU, your needed in the OR!
Jun 14, 2004, 10:40 AM
Registered User
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
Jun 14, 2004, 05:38 PM
It could happen...
InTheLift's Avatar
Quote:
Originally Posted by yclui
but making a wing from scratch is kind of too challenging for me
WHAT?!? Surely you jest!?!!?!
Jun 16, 2004, 09:41 AM
Detail Freak
target's Avatar
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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