qq 85" Yak Cowl Problem  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> Quique's Aircraft Support >> qq 85" Yak Cowl Problem
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qq 85" Yak Cowl Problem - 8/14/2006 1:54:11 AM   
brockb961


 

Posts: 7
Joined: 10/29/2003
From: St. Johns, MI, USA
Status: offline 		I have a 85" Yak with 40-50 flights and have really enjoyed it. Today though I found that both top cowl mounting screws had pulled through the cowl. I used the supplied gromets, but both the screw and the gromet pulled through the cowl.

Any idea on a good way to repair this?
       Post #: 1

RE: qq 85" Yak Cowl Problem - 8/14/2006 2:53:16 AM   
exeter_acres



Posts: 6132
Joined: 9/22/2004
From: Johns Creek, GA, USA
Status: online 		repair? not sure...others will chime in...

but I reinforced mine with CA hinges epoxied to the backside of the fiberglass... I then use larger nylon washers.....



maybe you could fiberglass the inside of the cowl and redrill... ?

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Extreme Flight RC tech support
IMAC members, Thanks for voting!

(in reply to brockb961)
       Post #: 2

RE: qq 85" Yak Cowl Problem - 8/14/2006 3:37:20 AM   
Rezagh


 

Posts: 1827
Joined: 6/10/2004
From: Rancho Santa Margarita, CA, USA
Status: offline 		Hi There,

Sorry to hear about your problem, however get Neoprene washers number 6 and use those instead. The washers are a little bigger so they will cover the hole for you.

Thank you,
Reza Gh.
Quique's Aircraft Support

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Quique's Aircraft Company

(in reply to brockb961)
       Post #: 3

RE: qq 85" Yak Cowl Problem - 8/14/2006 5:22:38 AM   
Copper



Posts: 30
Joined: 5/19/2003
From: Marshall, TX, USA
Status: offline 		Mine started cracking too, so I reinforced the holes with CA hinges. I used 30 minute epoxy and then redrilled the holes the correct size. I haven't had any problems since then. The neoprene washers that Rezagh mentioned will probably help too.
Copper

(in reply to brockb961)
       Post #: 4

RE: qq 85" Yak Cowl Problem - 8/14/2006 4:11:09 PM   
ncrego



Posts: 471
Joined: 8/28/2002
From: Ankeny, IA, USA
Status: offline 		You need a set of these:

http://www.pspmfg.com/CowlBinders.html

I put them on my Yak, and they are great, I used the stock screws that came with the Yak, and you can torque them down as hard as you want with no ill effects. It's really kinda slick, looks very nice. I put a little bit of silicone under them when I installed them, but now that I have it done, it certainly wasn't necessary. I've probably done 30 or so flights since installing them, and the cowl is still in great shape.

(in reply to Copper)
       Post #: 5

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