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Compass 7HV, 7HVU and Chronos Compass Compass 7HV, 7HVU and Chronos Model Helicopter Discussion

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Old 09-19-2011, 08:48 PM   #1 (permalink)
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Join Date: Dec 2010
Location: San Antonio, TX
Default Frame Fix

Hi Guys,

Got a few flights under my belt with my 7HV. I had a small accident and had to fix my lower frames so I thought I would share.

I used some unidirectional carbon and then vacuum bagged them. They came out nice.

One thing to note that I found on my lower frames. Upon close inspection the lower frames are not solid carbon. Only the outer layers are carbon. So basically the frames are fiberglass with only the outer 2 layers being carbon.

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Old 09-19-2011, 09:20 PM   #2 (permalink)
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Yep it will break there everytime I say. Both tine I crashed it broke the same spot. I fixed mine pretty much the same way except it's small enough where you don't need to vacuum bag it.

I agree crashing sucks!
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Old 09-19-2011, 09:48 PM   #3 (permalink)
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Mine broke there on a very gentle crash when my tail pin slipped out. I think it is inevitable since these sized machines weigh so much. What is nice though is that the frame is fine everywhere else. I just JB welded a piece of electrical fiberglass board for reinforcement. Not the prettiest thing, but worth saving $120 on lower frames without reducing any structural integrity.

The vacuum bag repair looks great.

I am considering lasering up some lower frames since they don't carry nearly as much load as the upper frames do. Then I could have some real fun with the design.

Diviner Gregg

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