Oratex is like Yoga Pants

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Re: Oratex is like Yoga Pants

Postby CanadianSheepHunter » Tue Nov 26, 2019 2:31 pm

BDA wrote:I have regrets

Now that I am putting finishing touches on the plane, I am finding small bits of glue that was “overbrushed” where it didnt need to be, and it has turned yellow, and is very hard to remove.

Next time I use Oratex glue I will be very careful to tape everything like I am painting.

The “extra” glue is hard to see until it turns yellow and hardens.

Mostly on tubing clusters


Do you have any pics to show what your talking about?...I got my Oratex ordered now.
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Re: Oratex is like Yoga Pants

Postby EchoWhiskey » Sun Dec 15, 2019 10:53 am

I was looking closely at the hinges on the empenage and noticed most of the welds are proud. Is anyone attempting to grind these down for a smoother finish? I am imagining it will show through and be obvious but maybe not a terrible concern because of location....

ny feedback would be greatly appreciated. I should have my fabric in about a month.
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Re: Oratex is like Yoga Pants

Postby EchoWhiskey » Sun Dec 15, 2019 10:53 am

I was looking closely at the hinges on the empenage and noticed most of the welds are proud. Is anyone attempting to grind these down for a smoother finish? I am imagining it will show through and be obvious but maybe not a terrible concern because of location....

ny feedback would be greatly appreciated. I should have my fabric in about a month.
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Re: Oratex is like Yoga Pants

Postby kenryan » Sun Dec 15, 2019 11:47 am

My recommendation would be to only grind a weld if absolutely necessary, for example to properly fit parts or hardware. Reason: grinding can severely weaken a weld.
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Re: Oratex is like Yoga Pants

Postby Tralika » Sun Dec 15, 2019 1:14 pm

My plane was the my first time covering and painting. Most people tell me it looks great but I see lots of mistakes and things I could have done better. However the welds under the fabric are not obvious even to my overly critical eye. I wouldn't mess with them.
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Re: Oratex is like Yoga Pants

Postby Clark in AZ » Sun Dec 15, 2019 1:36 pm

Perhaps rather than messing with the welds, you put SuperFill in the voids and smooth it out that way? That is what I'm doing.

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Re: Oratex is like Yoga Pants

Postby danerazz » Sun Dec 15, 2019 7:26 pm

I only ground welds to remove sharp edges/spalling that would likely cut the fabric over time. And it was more of a smoothing than a grinding. Mostly was just removing spalling.

I still missed one, on a top longeron. It really pisses me off, 90% sure it will cut through and require a patch, but I doubt anybody else ever sees it.
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Re: Oratex is like Yoga Pants

Postby SheepdogRD » Mon Dec 16, 2019 2:22 pm

danerazz wrote:I only ground welds to remove sharp edges/spalling that would likely cut the fabric over time. And it was more of a smoothing than a grinding. Mostly was just removing spalling.

I took the same approach: get rid of the spatter and smooth the hard edges.

The tapes interrupt any smooth lines, and they draw the eye far more than slight fabric variances. With all the struts and hinges and wires and exposed fasteners, it's a bumpy plane -- a bush plane -- and scars look sorta normal.
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Re: Oratex is like Yoga Pants

Postby BDA » Fri Dec 20, 2019 3:56 am

If you are using Oratex - a little extra glue on the bumpy spots will fill the holes and smooth the line.

I am a welder and was comfortable with grinding the really lumpy ones - but - do not grind welds on your airplane if you are not very experienced with aircraft welding.
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Re: Oratex is like Yoga Pants

Postby EchoWhiskey » Sat Dec 21, 2019 5:25 am

I like the leave it alone recommendation. I paid a lot for a top notch powder coat and the thought of grinding that away is unsettling. Especially at the weld.

I will fill as/if needed.

My order is in so I am hoping to get started soon.
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Re: Oratex is like Yoga Pants

Postby BDA » Fri Jan 10, 2020 5:38 pm

I finally got around to taking pictures of the extra glue that I was talking about.

Its not a huge deal to remove - but - it is cured on, so when scraping it off, it takes powder coat with it.

A little bit of pre tape would save a whole lot of headache.
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Re: Oratex is like Yoga Pants

Postby EchoWhiskey » Wed Jan 29, 2020 9:53 am

Is anyone using the heat scanner that attaches to the Steinel Heat Gun?

Wondering if it is worth it or not.
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Re: Oratex is like Yoga Pants

Postby BDA » Wed Jan 29, 2020 5:57 pm

Looks like It would be handy - especially when first getting used to the temps.

But - Holy Milk Cow!! - $200 - that's a lot for what it does.

I used a $45 dollar heat gun and a $10 thermal gun and did just fine. That setup is $500.

No I haven't used it though. I would be interested to know how fast and how accurate it is when going from one surface to the other.

The only trouble I had with getting temps right was when I went from fabric to fabric adhesion to fabric to tube where the heat sink was MUCH different.
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Re: Oratex is like Yoga Pants

Postby BucF16 » Thu Jan 30, 2020 9:50 am

EW, My first Steinal heat gun was right on temp. I used a laser temp sensor from Harbor Freight. The gun worked at the temps advised. But it got a internal short and was temp intermittent ( the fan was fine). So I went to Amazon and bought the new Steinal model. Stupidly i didn't check the temps. I was on the last cover of the fuselage and while final shrinking I burlap(ed) the area around the last wrinkles :oops:

The way I checked the temps: I took high temp wood stove paint and dated it on the metal at the front of the gun. Then took the laser and shot the it there.

Good Luck,
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Re: Oratex is like Yoga Pants

Postby kenryan » Thu Jan 30, 2020 10:34 am

For me the biggest danger was bumping the temp button on the Steinel, boosting the temperature without realizing it. Also, it's easy to let the mind wander while applying heat, need to stay attentive.
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