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Scott Stewart
Joined: 29 Jul 2008
Posts: 30
Location: Windsor, California
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 Posted: Mon Jul 26, 2010 10:54 am Post subject: Rear seat belt attachment clarification |
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Hi folks.
I need a little clarification on the rear seat plans. From what I can tell, the rear seat is set up for lap belts only. So four seat belt attachment points are needed. The plans call for fabricating four F40-11 attachments, but only show where two are installed in the center of the seat. The rear seat IPL says that the other two F40-11 attachments are to be installed at the sides of the seat through the rear of the seat and the rear spar uprights, but this is obviously incorrect since the rear of the seat is behind the uprights. The plans also call for fabricating two F42-4 rear seat belt attachment plates which get riveted to the side skins.
So what are the correct outside belt attachments to use? And what is the correct method to mount them? Am I supposed to go back into my aircraft design mode again to solve this?
Thanks.
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Scott Stewart
CH-640 built from plans
Flying since August 2014 |
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doug_geese(at)fwmetals.co
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| Posted: Tue Jul 27, 2010 7:01 pm Post subject: Rear seat belt attachment clarification |
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Scott,
The rear seats do in fact have 3 point attachment (shoulder belts). The upper attach point is a bracket that rivets between the turtledeck skin and the baggage bulkhead. I'm at Oshkosh right now so I can't be certain as to wear the outer lower attach points are. I believe that your are correct, the rear spar uprights are actually the front of the rear seat. When I get home I can take a closer look and send some pics if you would like.
Doug
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steveadams
Joined: 10 Jan 2006
Posts: 191
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| Posted: Wed Jul 28, 2010 4:16 am Post subject: Re: Rear seat belt attachment clarification |
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I don't have the plans with me, but here are a few photos of how I did mine. There is a single bracket in the top center where both shoulder belts attach. Sorry about the large size, I can't change it on this computer.
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Scott Stewart
Joined: 29 Jul 2008
Posts: 30
Location: Windsor, California
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| Posted: Wed Jul 28, 2010 11:51 am Post subject: Re: Rear seat belt attachment clarification |
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Thanks Doug and Steve,
I had forgotten about the upper attach point for the shoulder strap. I was focused on the lap belt attachment points and finishing the rear seat.
Steve, from your picture I see that you have the four identical F40-11 seat attachment points as called out in the IPL. Apparently, the F42-4 outer seat belt attachment plates were added to the plans at a later date. I also wrote to Zenair, and Mathieu just wrote back that he will check the plans after Oshkosh.
Thanks for everyone's help.
| | - The Matronics Zenith640-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Scott Stewart
CH-640 built from plans
Flying since August 2014 |
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