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Trimming the CH-750 Elevator skins

 
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dougsnash



Joined: 14 Apr 2008
Posts: 281

PostPosted: Thu Feb 18, 2010 2:42 pm    Post subject: Trimming the CH-750 Elevator skins Reply with quote

Guys, I'm helping a friend of mine kit build a CH-750. We are pretty much ready to start riveting the elevator skins on. My view of the project tells me that we should be trimming the elevator nose skins so that they have 10-15mm extending aft of the spar rivet line. The plans and instructions don't mention trimming anyplace.

Is the trimming the correct thing to do?

Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
C-GBQX

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Geoff Heap



Joined: 12 Jan 2006
Posts: 266
Location: Lindenwold, New Jersey

PostPosted: Mon Feb 22, 2010 5:27 am    Post subject: Re: Trimming the CH-750 Elevator skins Reply with quote

Well Doug, you can leave it long or you can trim it. How much we talking about.......Geoff

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dougsnash



Joined: 14 Apr 2008
Posts: 281

PostPosted: Mon Feb 22, 2010 8:32 am    Post subject: Trimming the CH-750 Elevator skins Reply with quote

I had another builder send me an offline message. He'd gotten his info from Roger at the factory that said they needed trimming.

Since this is not my plane and I am trying to function like an instructor or "Tech Counsellor" I asked the builder how much he wanted to leave. I explained that the minimum would be about 8mm from the rivet centerline and the maximum would be the approximately 25mm the un-trimmed skins were. He decided to trim to 15mm. I would have gone to 10mm myself but it is his plane and I want him to make his own decisions. Since he was erring on the side of caution, I supported his decision.

Doug MacDonald
CH-701 Scratch Builder
Final Assembly
NW Ontario, Canada
C-GBQX

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--- On Mon, 2/22/10, Geoff Heap <stol10(at)comcast.net> wrote:

Quote:
From: Geoff Heap <stol10(at)comcast.net>
Subject: Re: Trimming the CH-750 Elevator skins
To: zenith701801-list(at)matronics.com
Received: Monday, February 22, 2010, 7:27 AM
--> Zenith701801-List message
posted by: "Geoff Heap" <stol10(at)comcast.net>

Well Doug, you can leave it long or you can trim it. How
much we talking about.......Geoff

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