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05-29-2007, 02:50 PM
| #1 (permalink) |
| Bad-ass Super Contributer!   Join Date: Jan 2006 Location: Philadelphia , Pa U.S.A.
Posts: 1,018
 |  Ultra RC yak wing covering
Well on the 3rd flight of my 35% yak I heard a strange noise while flying, after coming back around I see some covering hanging off the wing! So I bring it down and to my amazement, the whole wing panel covering came off! I wasn't even doing any hard maneuvers or flying Mach 1. It appears the covering wasn't over lapped enough on the leading edge and the seam is at the center of the edge as opposed to being down further on the bottom of the edge of the wing. I had called Brian at Ultra Rc to see what the scoop is.We'll see.  |
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05-29-2007, 03:39 PM
| #2 (permalink) |
| Father of the Scale Furum  Join Date: Jan 2006 Location: Chapel Hill, TN Age: 32
Posts: 4,575
| Re: Ultra RC yak wing covering
whoa!
__________________ "I'll have the roast duck with the mango salsa" Kit builders check out.... http://bobflies.com/ 2.4 GHz is for your home telephone... 14MZ and 72 MHz for huckin' baby!! |
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05-29-2007, 07:24 PM
| #5 (permalink) |
| Thanks for the Support!   Join Date: Jan 2006 Location: Cleveland, Ohio Age: 38
Posts: 17,537
| Re: Ultra RC yak wing covering
Nice construction... at least you can inspect the wood... clean up the servo lead. (hey!!!! Always look on the bright side of life.. (whistle) weee wheee whooo who who who who who who who who who whooo whee whee who who who who who who who who who whooooooo - Monty Python)
__________________ Get the most current up-to-date R/C modeling news: www.flyinggiants.com www.rcgroups.com www.crackroll.com www.rccars.com  I don't be half steppin! And you KNOW THIS! |
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05-29-2007, 08:17 PM
| #6 (permalink) |
| Damn Birds!   Join Date: Mar 2006 Location: Miami, Florida Age: 48
Posts: 101
| Re: Ultra RC yak wing covering
That happen to some people that bought a first production run of another brand 50cc yak. They came out with the seam right along the leading edge of the wing (bad thing to do!!!!) The manufacture came out and sent every owner clear tape to put along the leading edge to prevent what happen to you. Second run they fixed by overlapping the seam further back.
__________________ Can't wait to go fly, I've run out of planes to fix  |
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05-29-2007, 08:22 PM
| #7 (permalink) |
| Father of the Scale Furum Join Date: Jan 2006 Location: Chapel Hill, TN Age: 32
Posts: 4,575
| Re: Ultra RC yak wing covering
I did read somewhere that the 50cc had a change in their directions that added that one should put clear covering over the seams on the leading edges.
__________________ "I'll have the roast duck with the mango salsa" Kit builders check out.... http://bobflies.com/ 2.4 GHz is for your home telephone... 14MZ and 72 MHz for huckin' baby!! |
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05-29-2007, 09:26 PM
| #9 (permalink) |
| Father of the Scale Furum Join Date: Jan 2006 Location: Chapel Hill, TN Age: 32
Posts: 4,575
| Re: Ultra RC yak wing covering
Yeah, excellent quality, but they did not overlap some of them enough...
__________________ "I'll have the roast duck with the mango salsa" Kit builders check out.... http://bobflies.com/ 2.4 GHz is for your home telephone... 14MZ and 72 MHz for huckin' baby!! |
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05-29-2007, 09:26 PM
| #10 (permalink) |
| Bad-ass Super Contributer! Join Date: Jan 2006 Location: Philadelphia , Pa U.S.A.
Posts: 1,018
| Re: Ultra RC yak wing covering
Ya , when I got the plane I ran the iron over the whole thing, never thought about putting clear tape or ultracote on the leading edge seam....I guess I will now.  |
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06-09-2007, 08:11 PM
| #11 (permalink) |
| Gettin' Lower!   Join Date: Dec 2006 Location: Loveland, Colorado
Posts: 72
| Re: Ultra RC yak wing covering
I had sealed the leading edge of the wings on my 107" with clear Ultracoat, but I did not do that on the stabs for some reason. I had ironed them down well, of course. Well, wheeling my plane back into the pits today I noticed that the leading edge seam on the port-side horizontal stab had come loose and the coating was starting to peel off. So I'd suggest sealing the horizontal stab LE seams as well. Greg |
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06-11-2007, 05:11 PM
| #12 (permalink) |
| Pro Crasherer  Join Date: Apr 2006 Location: Cambridge, England! Age: 20
Posts: 498
| Re: Ultra RC yak wing covering
I had the very same thing happen to the right wing on a EF 87" Yak (the original ones) at the biggest public display in the UK. I think as its still got a "sealed" wing, so it creates lift so i managed to get it down OK with minimal damage, thankfully, wasn't my plane! Bearing in mind that the planes are from the same factory....... and we had the same problem, the overlap wasn't big enough (plus it had been re-shrunk) and air got under and tore it off. Glad to see you got it down OK though
__________________ Ian Watson |
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