Oratex is like Yoga Pants
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Re: Oratex is like Yoga Pants
It does seem expensive. I have a laser gun that I will try and see how it goes.
Great point on the heat sinks!
On self etching primer. I did the wings with a two part. I decided to do the rear spar even though there is no adhesion on it and ran out of it. I picked up SEM 396940 one part today from Carquest, they didn't have two part in stock. Claims excellent adhesion and all that. This is basically autobody grade self-etching primer
BUT,
Lars says there are only certain one-parts that are proven.
Has anyone else used this? Anyone else using the one part? Lars says the Rustoleum stuff doesn't work well, which I had already assumed.
Great point on the heat sinks!
On self etching primer. I did the wings with a two part. I decided to do the rear spar even though there is no adhesion on it and ran out of it. I picked up SEM 396940 one part today from Carquest, they didn't have two part in stock. Claims excellent adhesion and all that. This is basically autobody grade self-etching primer
BUT,
Lars says there are only certain one-parts that are proven.
Has anyone else used this? Anyone else using the one part? Lars says the Rustoleum stuff doesn't work well, which I had already assumed.
Ed Whitaker
Humble Novice
What do you get when things don't go as planned? Experience.
Humble Novice
What do you get when things don't go as planned? Experience.
- SheepdogRD
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Re: Oratex is like Yoga Pants
They told me to use zinc chromate, and NOT to use zinc phosphate. Rust-Oleum is zinc phosphate.EchoWhiskey wrote: Lars says the Rustoleum stuff doesn't work well, which I had already assumed.
I used PTI's Zinc Chromate Primer, bought from Aircraft Spruce. Don't buy it until you need it -- it has a relatively short shelf life.
Richard Holtz
Highlander N570L -- Ms. Tonka -- in gestation
If just enough is really good, then too much ought to be perfect.
Highlander N570L -- Ms. Tonka -- in gestation
If just enough is really good, then too much ought to be perfect.
- BDA
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Re: Oratex is like Yoga Pants
I used the spray can 2 part, push the button on bottom of can to mix it
Then spray, seems to be very tough stuff
I posted pics of it a few pages back on this thread.
Then spray, seems to be very tough stuff
I posted pics of it a few pages back on this thread.
SuperStol XL Alaskan With Titan 340
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
- SheepdogRD
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Re: Oratex is like Yoga Pants
So that's one use and the can is done? How much time do we get before the can is unusable?BDA wrote:I used the spray can 2 part, push the button on bottom of can to mix it.
Richard Holtz
Highlander N570L -- Ms. Tonka -- in gestation
If just enough is really good, then too much ought to be perfect.
Highlander N570L -- Ms. Tonka -- in gestation
If just enough is really good, then too much ought to be perfect.
- BucF16
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Re: Oratex is like Yoga Pants
I used PTI's Zinc Chromate Primer, bought from Aircraft Spruce. Don't buy it until you need it -- it has a relatively short shelf life.[/quote]
This is the only Chromate rattle can that I have found that doesn't have phosphates. I used it on spot treatments that would underlie Oratex and Hot melt glue.
Cheers,
Bruce
This is the only Chromate rattle can that I have found that doesn't have phosphates. I used it on spot treatments that would underlie Oratex and Hot melt glue.
Cheers,
Bruce
Bruce Johnson Highlander # 393
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com
- BDA
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Re: Oratex is like Yoga Pants
Yes once mixed you have 24 hours to useSheepdogRD wrote:So that's one use and the can is done? How much time do we get before the can is unusable?BDA wrote:I used the spray can 2 part, push the button on bottom of can to mix it.
I used 3 cans to paint spars and sheet metal on both wings
SuperStol XL Alaskan With Titan 340
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
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Re: Oratex is like Yoga Pants
I did the 1" strip test per with the SEM one part,
take a 1 " strip of Fabric, glue to primed aluminum leaving an end off.
Once dried hang 2.6lbs and if it holds its good.
It passed however I do not like how this one part is going on. Seems more like a wash, and subsequent coats dissolve the solids. I may have not waited long enough between coats but it was certainly dry.
I think the hardener makes a big difference in that respect. I will stick with two part.
Most importantly, a sincere Note of Appreciation to those that have shared their trials and errors. Invaluable shared experiences that help those of us just getting started!
take a 1 " strip of Fabric, glue to primed aluminum leaving an end off.
Once dried hang 2.6lbs and if it holds its good.
It passed however I do not like how this one part is going on. Seems more like a wash, and subsequent coats dissolve the solids. I may have not waited long enough between coats but it was certainly dry.
I think the hardener makes a big difference in that respect. I will stick with two part.
Most importantly, a sincere Note of Appreciation to those that have shared their trials and errors. Invaluable shared experiences that help those of us just getting started!
Ed Whitaker
Humble Novice
What do you get when things don't go as planned? Experience.
Humble Novice
What do you get when things don't go as planned? Experience.
- kenryan
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Re: Oratex is like Yoga Pants
I used XIM polyurethane primer/sealer/bonder. It is one part, water soluble, no bad odors, easy to brush. Lars and I tested it and it performed very well.
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Super Stol Kit #299
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Re: Oratex is like Yoga Pants
Thanks everyone for posting your experiences. Keep'em coming!
Clark
Clark
Building SuperSTOL Kit 512
Cave Creek, AZ
Cave Creek, AZ
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Re: Oratex is like Yoga Pants
Started perusing the manual that came with the fabric. Great Manual!
The interrib bracing is interesting. i havent seen a mention of it here so Im guessing noone is using it. But aside from the extra work, is the structural benefit not worth it?
The interrib bracing is interesting. i havent seen a mention of it here so Im guessing noone is using it. But aside from the extra work, is the structural benefit not worth it?
Ed Whitaker
Humble Novice
What do you get when things don't go as planned? Experience.
Humble Novice
What do you get when things don't go as planned? Experience.
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Re: Oratex is like Yoga Pants
Followed everyones lead and started with trim tab. Took forever but like others, i am now a believer. STUFF IS BRILLIANT! It also appears to have some therapeutic value as well. A twofer
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Ed Whitaker
Humble Novice
What do you get when things don't go as planned? Experience.
Humble Novice
What do you get when things don't go as planned? Experience.
- BucF16
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Re: Oratex is like Yoga Pants
no inter rib lacing for me.
Bruce Johnson Highlander # 393
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com
- BDA
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- Location: Kenai Alaska
Re: Oratex is like Yoga Pants
Nice job
Now put it in the freezer
And shrink again
I asked lars about inter rib bracing
His reply (the short version) - the manual was done based on a european plane, if your kit says to use it then use it - if not used in your kit - dont worry about it.
Now put it in the freezer
And shrink again
I asked lars about inter rib bracing
His reply (the short version) - the manual was done based on a european plane, if your kit says to use it then use it - if not used in your kit - dont worry about it.
SuperStol XL Alaskan With Titan 340
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
N331AK. Shawn Taplin
Wing extensions,Symetrical Airfoil tail ribs (NACA 21)
Mods in progress: Heavier struts, Double slotted flaps
Goal: 15mph no wind
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Re: Oratex is like Yoga Pants
Thanks Shawn,
I figured i would have read about it somewhere. A couple things i find are working for me. TIG gloves manage the heat and can help to apply pressure in a pinch when the 3rd hand isnt available. I have been apply glue lightly and cross brushing to remove ridges. Seems to work well.
Looking for advice on covering the gap shown. Im sure there is a preferred approach I just havent found it.
I figured i would have read about it somewhere. A couple things i find are working for me. TIG gloves manage the heat and can help to apply pressure in a pinch when the 3rd hand isnt available. I have been apply glue lightly and cross brushing to remove ridges. Seems to work well.
Looking for advice on covering the gap shown. Im sure there is a preferred approach I just havent found it.
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Ed Whitaker
Humble Novice
What do you get when things don't go as planned? Experience.
Humble Novice
What do you get when things don't go as planned? Experience.
- BucF16
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Re: Oratex is like Yoga Pants
My Highlander is one of the first to not use finishing tapes with the Oratex process. BUT for the Elevator/ Rudder area I did use tapes. They covered those gaps nicely.
Cheers,
Bruce
Cheers,
Bruce
Bruce Johnson Highlander # 393
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com
"Because I fly, I envy no man on Earth"
Builder web site:
http://www.bruceshighlander.blogspot.com