In this video we go through the entire process of punch testing the Dacron sailcloth on a Rans S 12 using a Maule punch tester and a Quicksilver Dacron sailcloth punch tester.
Пікірлер: 37
@eahenrie6 жыл бұрын
Brian, thank you for another informative, safety minded video. Your expertise and willingness to share it is a great service to those of us who are not as experienced as you.
@aerocam26 жыл бұрын
Excellent review Brian. Always appreciate listening to you guys teach. Mack L.
@kenburrell62276 жыл бұрын
Brian and Carol, thank you for such excellent and helpful information. Happy holidays to all.
@TheLandloard6 жыл бұрын
Thanks Brian great video. You and Carol have a good Christmas
@6204734 жыл бұрын
Used the maul tester many times but I never used the quicksilver because it looks too aggressive. You have to watch out for guys who paint their airplane over and over it makes the fabric very hard. Find a spot that has been exposed to the UV but not painted over and over. It can be difficult. Your license is on the line boys.
@devinrobinson4154 жыл бұрын
Very informative video. Great to learn the different methods and reasons for testing with different conditions of fabrics and tools.
@USNVA116 жыл бұрын
Nice looking Varga Kachina. I’ve always liked that airplane. 😃
@L51able6 жыл бұрын
Thanks Brian for another great presentation! Your the Best!
@P40BTomahawk6 жыл бұрын
Very good demo, thanks for the upload.
@Simplexaero6 жыл бұрын
Great test and presentation
@awodsaeed6 жыл бұрын
Brian . Thank you for punching all of this fabrics just to show us this nice informative information. I am planing to come in May 18 for my licence renewal.
@karanchhetri51216 жыл бұрын
Thanks Guru for your great knowledgeable video 👍
@denishooper26186 жыл бұрын
pro , informative , objective BIG THX
@esau823 жыл бұрын
This testing has always looked so scary to do even on new sails
@ronnetzel3565 жыл бұрын
Enjoyed it very much, learned a lot. Thanks for sharing.
@willwagner72226 жыл бұрын
Awesome! Another home run by Brian and crew at Rainbow aviation
@challenger2ultralightadventure6 жыл бұрын
VERY informative! Especially considering I am looking at purchasing a used ultralight! Thanks.
@StingFlight6 жыл бұрын
So enjoyable & super-nice graphics. Thanks!
@pegbars6 жыл бұрын
Outstanding video! I learned much. Thank you!
@LupusMechanicus5 жыл бұрын
Doesn't this weaken the fabric at that spot? Seems kinda counter productive.
@randyrichmond36384 жыл бұрын
What type of cotton or linen was the covering? Table 2-1 only refers to these two materials.
@cliffordc94976 жыл бұрын
Bryan you sir! Need a haircut.
@michaelamick82956 жыл бұрын
Drop price by 4k, ouch! Thx Brian, always learn alot watching your videos. Have you tested the newer prepainted fabric skins in the darker colors yet?
@RainbowAviation6 жыл бұрын
I think you're referring to Oratex. In the answer is no. This is such a new fabric that it hasn't been service long enough that anyone really is needed to punch test it.
@thatguy21054 жыл бұрын
What does new fabric punch test to failure at?
@Hybridhuman1004 жыл бұрын
What type of fabric you are testing in your video?
@PeteCH7016 жыл бұрын
Great information. Thanks for making the video. Question- The punch test leaves a dimple that can be seen after several years. Have you found a way to remove the test dimple? I was going to try some heat.
@RainbowAviation6 жыл бұрын
Great question. There are several points that can be made here. First of all during the early years of the life of an aircraft and experienced mechanic can identify that there is no need for a punch test. Typically, after the aircraft starts to show some signs of UV damage is when we really need to start testing the fabric. When the fabric is new it is much more elastic. And typically will stretch back to nearly invisible. As the aircraft gets older and the fabric starts to deteriorate is when these dimples no longer flatten out again. That's one of the clues that the fabric is getting a little older. Using a heat gun on stabilized Dacron has always been considered to do more damage to the fabric than good. In order to" force" the fabric to stretch even tighter than when it was originally stabilized would require temperatures that compromise the integrity of the fabric. Keep in mind, that even using the punch tester is considered only a tool to assist in determining the condition of the fabric. In the instructions for the punch tester it is identified as such. "The Maule fabric tester is inspection aid. Through its use, the inspector is certifying that in his judgment, based on the FAA and industry standards, plus his training and experience, the fabric is acceptable for return to service". Personally, on new aircraft, I rarely use the punch tester. But remember, I have years of experience, and have punch tested literally hundreds of fabric surfaces to failure. In our maintenance class, we have a series of a dozen different surfaces of different conditions to allow our students to punch test all the way to failure to establish a sense of when the fabric is getting close to its limits. All this being said, I hate those dimples too.
@MatHelm6 жыл бұрын
I knew this about paint, as in the "Day Glo" colors break down faster, but hadn't considered it with fabric. I suppose it's the same principle of which wavelengths it absorbs, and which it reflects. So the most durable color would be white?
@RainbowAviation6 жыл бұрын
Anecdotally, the dark colors seem to hold up better. No definitive tests about this that I can find.
@pacificwindenterprisesinc.83484 жыл бұрын
@@RainbowAviation In my plastics backround we added carbon black to block UV at the very surface. It is all about UV penetrating into the material. Notice the clear plastic degredation vs black plastic. Some of our products had 45000 year half life in direct sun exposure as long as they were BLACK!!
@jorgepon76125 жыл бұрын
Hi Brian ! coul you tell me the diameter punch ? todo some chek
@float_sam4 жыл бұрын
It's rumored Brian still hasn't cut that hair
@hillbilly4christ6385 жыл бұрын
Is that a wig?
@jolllyroger15 жыл бұрын
Before the test I predict it will fail
@deafmusician26 жыл бұрын
I hate the punch test. It's a usually destructive test. There are other ways
@pacificwindenterprisesinc.83484 жыл бұрын
The .095 dia tip calculates to 159,160 lbs/sq ft using the 10 lbs test standard. Maybe 10 lbs for a square inch tip; at least that's only 1,440 lbs/sq foot load. Ultralights are in the 3 to 6 lb/sq ft wing loading range. Who's doing the math?