Repairs

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eta150
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Repairs

Postby eta150 » February 26th, 2010, 9:31 am

This was suggested, and it seems like a great idea. All posts involving repairs and fixes should be posted here.
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Re: Repairs

Postby StampingKid » February 26th, 2010, 9:35 am

Thanks Eta for the thread. And I'll repost my repair from the coverings thread.
we got a tear in our covering when trimming off the excess and in preparing a patch noticed that the mylar was almost as hard as tape in sticking to itself. So we wetted the repair spot and gently rolled the wing over the laid out patch. Had a snow day yesterday so got some gym time and It has held amazingly well over 10 flights
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Re: Repairs

Postby eta150 » February 26th, 2010, 9:41 am

Yeah, many liquids work well for that. In a pinch, you should always bring spare patches with you, and you can even use saliva if necessary.
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Re: Repairs

Postby jcollier » February 26th, 2010, 12:12 pm

Water and saliva do OK in a pinch. We usually use a little diluted glue stick and "paint" the area that needs repair. The rolling over technique is a good one for sure. I don't think any of our planes is without some kind of repair. ;)

For balsa breaks, a small piece of 1/32" balsa for a patch makes for a stronger repair with very little added weight.

My son has needed to make repairs often at or right before States. In 6th grade, he had his BLG stepped on, and was able to pull out a 5th.

Last year, his backup plane had an accident with serious wing damage two days before States. When we got there, the primary plane was not flying right due to a bent prop shaft, so he had to fly the backup.

Gotta always have the superglue handy! :lol:

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Re: Repairs

Postby jander14indoor » February 26th, 2010, 1:25 pm

I like this thread! To be truly successful at WS you have to be comfortable fixing your plane under any and ALL circumstances.

This comes from experience and practice. Build lots of planes, fly lots.

While a well built plane is pretty robust to flight damage, they are VERY fragile to handling. Your planes will be broken a lot, get over it.

Get comfortable with field repairs, they are necessary. Learn how to make quick, accurate and light repairs.

Heck, sometimes you have to break your plane on purpose (to adjust it) you need to be comfortable with this!

Try to avoid a "BEST" plane. Learn what makes a plane work and make sure ALL your planes are "BEST" planes. If your backup is not 'fixable' so that its as good as your main plane, make another backup!

Patching, with the very light mylars, saliva or pop (with real sugar) are the standard among the experts. Use a small paint brush to apply. Behind these is very thinned contact cement (10 to one solvent to glue kind of thin). Or glue stick disollved into water or alcohol. Wet the brush liberally, brush on the glue stick and apply to covering.

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Re: Repairs

Postby blue cobra » February 26th, 2010, 1:38 pm

At States last year, in the very humid gym my wing posts weakened and broke when I tried to attach it to my plane. I don't entirely remember it, but I believe my CA wouldn't cure, and, flying on broken posts, I got I believe a 76 second flight out of a 120 second plane. Considering first place was 130 seconds, this was a huge disappointment. Does anyone know what could have helped?
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Re: Repairs

Postby andrewwski » February 26th, 2010, 2:28 pm

Some CA accelerator would have probably cured the CA.

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Re: Repairs

Postby jcollier » February 26th, 2010, 4:47 pm

This was something I mentioned last year, but at PA States, a parent who brought a plane in for a competitor somehow fell on a styrofoam box and crushed one of the better planes that was at the competition. The team did a heroic job of gluing it back together and they got a flight of 80 sec. or so. So...in addition to being able to repair your plane, be sure you have something as safe and secure as possible to protect it.

Also, I don't know how many teams can really have a backup plane that is just as good as their primary plane, but it sure helps to get one as close as possible. I know my son was not pleased with me when I insisted he fly his backup to try to get it as good as possible, but it turned out he needed it, and it did well enough.

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Re: Repairs

Postby gh » March 14th, 2010, 12:34 pm

With respect to repairs, don't mix and match CA and pretty much any other glue. I find that CA will not "stick" or cure properly on a joint that has been glued with Duco, at all, which is extremely frustrating when repairing your plane with CA. Also, for fast repairs use thinner CA because it sets much faster and usually alleviates the need for accelerator, which is nasty stuff.
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Re: Repairs

Postby Littleboy » March 27th, 2010, 10:40 am

This year at regionals my tail broke off and I glued it back on wrong so it flew strait into the wall. I got 40 seconds out of a 2:30 plane. I still got 4th. :lol:

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Re: Repairs

Postby Draylon Fogg » March 31st, 2010, 3:20 pm

Count yourself lucky Littleboy....:) nice username
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Re: Repairs

Postby NJman-77 » April 4th, 2010, 6:23 pm

does any one use streach tite {saran wrap} ,,,if not then what
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Re: Repairs

Postby NJman-77 » April 4th, 2010, 6:25 pm

At States last year, in the very humid gym my wing posts weakened and broke when I tried to attach it to my plane. I don't entirely remember it, but I believe my CA wouldn't cure, and, flying on broken posts, I got I believe a 76 second flight out of a 120 second plane. Considering first place was 130 seconds, this was a huge disappointment. Does anyone know what could have helped?
new wing posts

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Re: Repairs

Postby blue cobra » April 4th, 2010, 6:38 pm

does any one use streach tite {saran wrap} ,,,if not then what
:ugeek:
Read this pdf.

See the Covering Thread.

But basically, no one uses saran wrap. It's a terrible covering that is entirely inappropriate for this event. Way too heavy. The "best" covering is probably 0.9um mylar. It's super light, but still workable for students. It can be purchased at this Linkhttps://www.a2zcorp.us/store/SearchDisp ... 0968891330}[/hardurl]

Another covering that is even easier to work with and still appropriately light are shopping/produce bags. Look for the flimsiest, lightest ones.

And seriously, read this pdf.
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Re: Repairs

Postby NJman-77 » April 5th, 2010, 4:02 pm

thanks


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