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  #1  
Old 04-19-2017, 02:14 AM
JurgenRoeland JurgenRoeland is offline
 
Join Date: Oct 2010
Location: Belgium, Geraardsbergen
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Default Drilling arm rests to F-704 ?

Hi,

I'm in the process of rivetting my forward fuselage and side skins to the tailcone and all excited to get to the point of rolling over the canoe.

During rivetting I noticed that I didn't drill the forward tab of the armrest F-720 into the F704 main spar bulkhead. The F704 is not predrilled at this location. I didn't do this yet because I realised the F-704K upright cap strips still needs to be put in place later. This tab in the armrest goes in with a LP4-3 pop rivet because of the impossible access on the inside later.

When did you guys actually drill this hole in the F-704 and install the pop rivet ?
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  #2  
Old 04-19-2017, 05:10 AM
tgmillso tgmillso is offline
 
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Location: Launceston, Tasmania, Australia
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You've got plenty of time yet. You just want to have it drilled preferably prior to painting the interior, which given that you are building a slider, should be about the last thing you do before you rivet on the F-7106 forward top skin (for access reasons). Before you get to this point make sure you have pre fitted your fuel lines, rudder bar (then removed it because you will need to get in there to buck rivets), drilled all the required holes in your firewall and mounted any doublers, put the belly insulation on (if you are doing it) and prepped the materials for the firewall insulation (but not yet installed). The arm rest should Not be riveted on until you have installed the canopy roll bar, as there is a nut holding the roll bar down on both sides that you will need to access. Once the F-704k is riveted on, you will lose access to this nut. Basically, prep/paint your arm rests and F-704K, but don't rivet them on until right at the end.
As our American cousins like to say, your mileage may vary (the metric version of that saying just doesn't seem to work).
Tom.

Last edited by tgmillso : 04-19-2017 at 06:29 AM. Reason: Typo
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  #3  
Old 04-19-2017, 05:38 AM
BillL BillL is offline
 
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Location: Central IL
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Default Waiting - -

Agree - during final routing of static lines & wiring, you may want to route lines/wired under that rail, having the caps off until that is completed is a good idea. Mine were installed too early and caused extra work.
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  #4  
Old 04-19-2017, 09:15 AM
JurgenRoeland JurgenRoeland is offline
 
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Location: Belgium, Geraardsbergen
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so the K's stay of as long as possible which I was also planning.

Did you already rivet the arm rest horizontal line on the side skin and just leave the tab unattached from F704K or did you leave the whole arm rest unrivetted until last?
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  #5  
Old 04-24-2017, 11:20 AM
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Raymo Raymo is offline
 
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Quote:
Originally Posted by JurgenRoeland View Post
Did you already rivet the arm rest horizontal line on the side skin and just leave the tab unattached from F704K or did you leave the whole arm rest unrivetted until last?
Yes. Many also install a piece of aluminum angle under the arm rest to give it extra support.
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  #6  
Old 04-26-2017, 02:37 AM
JurgenRoeland JurgenRoeland is offline
 
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thx for the response guys. building on
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  #7  
Old 04-26-2017, 07:33 AM
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bret bret is offline
 
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As mentioned above I would recommend the angle reinforcement for the arm rest also. I used a router to radius the outside corner of a length of 3/4 X 3/4 .125 angle and riveted to the arm rest.
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