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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › Loose Muffler fixed on my Predator Gasser
07-17-2006 01:02 PM  14 years ago
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E2C_Mech

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Round Hill, VA

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Loose Muffler fixed on my Predator Gasser
I had a problem with the new V2 muffler coming loose on my Predator gasser. I cleaned the threads on the bolts real good, applied red Locktite to the bolts and applied a bead around the flange of the muffler. I let the bird sit for a while (days) to make sure the Locktite fully dried. I flew for 5 minutes and checked the bolts with the muffler hot, engine still running. I could not move the bolts. Continued to fly and checked the bolts one more time after shut down, again, could not move the bolts. This seemed to be an easy fix for a troublesome problem.
Fly More, Fly More Often!
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07-17-2006 05:20 PM  14 years ago
jackheli

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Vancouver - Canada

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Good for you that the solution was simple. On mine loctite would never hold, no matter what I did.

I ended up re-tapping the four 3mm to 4mm AND drilling the threads off the engine, using longer 5mm bolts adding steel nuts to the back of the mounts. I had to grind the nuts so they would align properly with the mount holes. This also helped since the nuts ended up being put in place with some interference with the crankcase, which held them in place nicely.
It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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07-17-2006 08:46 PM  14 years ago
E2C_Mech

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Round Hill, VA

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Dear Jack,

I remember reading your post from an earlier thread. Your advise is going to be the next try if this does not hold. This is the same type fix I used on my plank mufflers. Thanks for the reply. Howie
Fly More, Fly More Often!
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