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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › 450SE Blade grip and blade tension
07-30-2007 07:35 PM  13 years ago
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gmebey

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Fort Collins, CO

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450SE Blade grip and blade tension
I have a 450SE and currently running the Align 325 Pro (woodys). Here lately I have noticed that my blade tension (blade bolt torque) is loosing over time, which makes me a bit concerned about having a boom strike in flight.

I readjust the bolt torque and things are fine for a few flights, and the it loosens up again.

My questions are:
Is this normal with the 325 Pros?
Is there a washer or shim that I can used to help corrected this issue?

.
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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07-30-2007 08:48 PM  13 years ago
SSN Pru

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Taxachusetts

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get some new nylon insert nuts. they are probably worn out. if they are new then you need to find out why they are loosening. most likely vibration...Stupidity can be cured. Ignorance is for life!
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07-30-2007 08:50 PM  13 years ago
gmebey

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Fort Collins, CO

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I don't think it is the nuts since I just replaced them after a crash.

At this point I’m wondering if the blades are an issue...I was using the 315CF blades before and didn't have this problem
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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07-31-2007 02:35 AM  13 years ago
bigdog714

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Rochester, MN U.S.A.

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Are the bolts long enough to make good contact with the nylon, and check the blade root, being wood, they sometimes compress and begin to splay under the plastic coating were it cant be seen.MD 800
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07-31-2007 03:45 AM  13 years ago
gmebey

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Fort Collins, CO

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The bolts are long enough and I really don’t think the bolts are the issue. It seems to me that blade roots are compressing or the plastic blade roots are cold flowing (is that even possible with plastic?).

What do you mean by “splay”, is it plastic defect from molding, and what can be done about it?
"Once you are in RC you are in for life. You may go away but it will draw you back." By an
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07-31-2007 04:10 AM  13 years ago
grimthenoble

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Woodman, WI

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You should have at least 2 threads past the nylon nut. When I first got my trex 450 the threads of the main blade bolts were flush, thats a no no so I switched them out with the proper bolts. Your blade bolts can loosen after a period of time and weather conditions but it shouldnt within a couple flights. You might want to try some good carbon blades like radix,vblades,align 3ks.. etc.. wood blades have a tendency to swell and dry up, back and forth... thats why I use carbons, If you cant afford carbons just check it often. Happy Flying!
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