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#1
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Certificated a/c, inexpensive epoxy primer, autobody?
I have a certificated a/c (rag and steel Tcraft). I'm considering the Superflite I covering system. Since the Superflite system apparently doesn't begin until the 'apply the cloth' stage, I'm free to use any primer. I'd like to use an epoxy primer since I've seen what condensation did to my steel tubes. So I'm looking for an inexpensive epoxy primer. Am I restriced in what I use since it's a certified a/c ? Must I stay away from the auto body shop/store? Suggestions? - Mike |
#2
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Certificated a/c, inexpensive epoxy primer, autobody?
In article ,
Michael Horowitz wrote: I have a certificated a/c (rag and steel Tcraft). I'm considering the Superflite I covering system. Since the Superflite system apparently doesn't begin until the 'apply the cloth' stage, I'm free to use any primer. I'd like to use an epoxy primer since I've seen what condensation did to my steel tubes. So I'm looking for an inexpensive epoxy primer. Am I restriced in what I use since it's a certified a/c ? Must I stay away from the auto body shop/store? Suggestions? - Mike You have to make sure that the stuff you apply has enough flexibility that it doesn't start cracking. Cracking/ringworming is a problem with standard automotive urethane/epoxy on fabric. I suggest that you have a long chat with a good paint guy who has experience with fabric. |
#3
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Certificated a/c, inexpensive epoxy primer, autobody?
Orval -
I think that Mike is talking about primer for his fuselage frame, not the fabric. Some covering system require their "brand" of metal primer for proper adhesion of fabric to frame. |
#4
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Certificated a/c, inexpensive epoxy primer, autobody?
On Sat, 21 Oct 2006 12:31:00 -0700, Carl Ellis
wrote: Orval - I think that Mike is talking about primer for his fuselage frame, not the fabric. Some covering system require their "brand" of metal primer for proper adhesion of fabric to frame. Carl is right on - MIke |
#5
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Certificated a/c, inexpensive epoxy primer, autobody?
Michael
I'm using the Superflite covering materials (System VI) on the Tailwind I'm building. After a lot of research (and phone calls & emails with Superflite) , I found out that what you use for a primer IS important because if it is not a really good two part epoxy system, the covering adhesives (and related MEK solvent) will dissolve the primer! For example: I was going to use PPG DP48LF (white) epoxy primer on the sandblasted tube fuse frame. According to Superflite's engineer (and others) - this will not stand up to the solvents well enough!! But since I planned to use their urethane color topcoat on the frame before covering, no problem.. (phew!) Quite a few of the guys in the Tailwind group have used Randolph Epibond with good success under Superflite and Polyfiber processes - so I know that is an acceptable choice for experimentals if you are not trying to match a certain color. For certified..... I think you might have to stick with the manufacturer's process to get the FAA "approved" (STC?) "OK for this airplane" - but that is a question for the FAA reg experts/DAR's.. Dave PS. Back when we lived in upper state Vermont (and the FBO could get reasonable insurance rates) we rented a T-Craft out of Highgate (FSO). VERY nice flying airplane.. It was a lot of fun! While the engine was small and hand started, I thought it was a winner!! Good luck with your project! "Michael Horowitz" wrote in message ... On Sat, 21 Oct 2006 12:31:00 -0700, Carl Ellis wrote: Orval - I think that Mike is talking about primer for his fuselage frame, not the fabric. Some covering system require their "brand" of metal primer for proper adhesion of fabric to frame. Carl is right on - MIke |
#6
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Certificated a/c, inexpensive epoxy primer, autobody?
Dave - I have an e-mail out to Superflite asking them where there
process begins. For example (as you and others point out) some of the fabric adhesives don't react well with some primers, so the approved process would have to extend to what primer is used. In many cases, the owner of the process may also manufacture that primer. Since their tech guy said Zinc Oxide was fine as a primer for System 1 and their literature (for system 1) doesn't specify a primer, I feel free to use anything I want (but to best protect the metal, I'd like to go with a 2 part epoxy) so I'm left looking for a good/inexpensive epoxy primer. Interesting - if they don't specify a primer and the process won't work with some primers, then they have a problem! - MIke On Mon, 23 Oct 2006 01:36:44 GMT, "David Lamphere" wrote: Michael I'm using the Superflite covering materials (System VI) on the Tailwind I'm building. After a lot of research (and phone calls & emails with Superflite) , I found out that what you use for a primer IS important because if it is not a really good two part epoxy system, the covering adhesives (and related MEK solvent) will dissolve the primer! For example: I was going to use PPG DP48LF (white) epoxy primer on the sandblasted tube fuse frame. According to Superflite's engineer (and others) - this will not stand up to the solvents well enough!! But since I planned to use their urethane color topcoat on the frame before covering, no problem.. (phew!) Quite a few of the guys in the Tailwind group have used Randolph Epibond with good success under Superflite and Polyfiber processes - so I know that is an acceptable choice for experimentals if you are not trying to match a certain color. For certified..... I think you might have to stick with the manufacturer's process to get the FAA "approved" (STC?) "OK for this airplane" - but that is a question for the FAA reg experts/DAR's.. Dave PS. Back when we lived in upper state Vermont (and the FBO could get reasonable insurance rates) we rented a T-Craft out of Highgate (FSO). VERY nice flying airplane.. It was a lot of fun! While the engine was small and hand started, I thought it was a winner!! Good luck with your project! "Michael Horowitz" wrote in message .. . On Sat, 21 Oct 2006 12:31:00 -0700, Carl Ellis wrote: Orval - I think that Mike is talking about primer for his fuselage frame, not the fabric. Some covering system require their "brand" of metal primer for proper adhesion of fabric to frame. Carl is right on - MIke |
#7
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Certificated a/c, inexpensive epoxy primer, autobody?
I used an epoxy callled MoPoxy for my steel tube. The exopxy primer is used
on ships and in marine applications to protect them from rust. I am unsing polyfibre to cover the aircraft. They told me to put some mek or acetone on a rag and lay the rag on the epoxy primed surface. If it softens the primer, it is not suitable for use with polyfibre. It is flexable enough to use in marine applications with far more flexing than I would expect in my airplane. It comes in a list of different colors and types. I avoided the "high build" type. Charlie "Michael Horowitz" wrote in message news I have a certificated a/c (rag and steel Tcraft). I'm considering the Superflite I covering system. Since the Superflite system apparently doesn't begin until the 'apply the cloth' stage, I'm free to use any primer. I'd like to use an epoxy primer since I've seen what condensation did to my steel tubes. So I'm looking for an inexpensive epoxy primer. Am I restriced in what I use since it's a certified a/c ? Must I stay away from the auto body shop/store? Suggestions? - Mike |
#8
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Certificated a/c, inexpensive epoxy primer, autobody?
Michael Horowitz wrote:
Dave - I have an e-mail out to Superflite asking them where there process begins. For example (as you and others point out) some of the fabric adhesives don't react well with some primers, so the approved process would have to extend to what primer is used. In many cases, the owner of the process may also manufacture that primer. Since their tech guy said Zinc Oxide was fine as a primer for System 1 and their literature (for system 1) doesn't specify a primer, I feel free to use anything I want (but to best protect the metal, I'd like to go with a 2 part epoxy) so I'm left looking for a good/inexpensive epoxy primer. Interesting - if they don't specify a primer and the process won't work with some primers, then they have a problem! - MIke EpiBond - best stuff I've rvrt found - and not THAT expensive. Expecially for what you get. Richard |
#9
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Certificated a/c, inexpensive epoxy primer, autobody?
In article ,
"ccwillwerth" wrote: I used an epoxy callled MoPoxy for my steel tube. The exopxy primer is used on ships and in marine applications to protect them from rust. I am unsing polyfibre to cover the aircraft. They told me to put some mek or acetone on a rag and lay the rag on the epoxy primed surface. If it softens the primer, it is not suitable for use with polyfibre. It is flexable enough to use in marine applications with far more flexing than I would expect in my airplane. It comes in a list of different colors and types. I avoided the "high build" type. Charlie "Michael Horowitz" wrote in message news I have a certificated a/c (rag and steel Tcraft). I'm considering the Superflite I covering system. Since the Superflite system apparently doesn't begin until the 'apply the cloth' stage, I'm free to use any primer. I'd like to use an epoxy primer since I've seen what condensation did to my steel tubes. So I'm looking for an inexpensive epoxy primer. Am I restriced in what I use since it's a certified a/c ? Must I stay away from the auto body shop/store? Suggestions? - Mike I would prime the tube fuselage with 2-part epoxy primer and then paint it with 2-part polyurethane, which is pretty resistant to solvents. |
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