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jubal_sackett
 Post subject: Flap Assembly
PostPosted: Fri Aug 24, 2018 1:14 pm 
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I've been using the "Chris Fast" flap assembly instructions in newsletter 53. Chris indicated monel pop rivets on lower surface beam/skin i/f. I am not finding flush pops at 1/8" so thinking Chris was talking dome and that flush rivets in this area would be mostly for aesthetics in an unobservable location. Have other approachs been adopted since Chris's writeup?

Thanks
Tom


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fytrplt
 Post subject: Re: Flap Assembly
PostPosted: Fri Aug 24, 2018 2:40 pm 
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Using a homemade die and a hammer, I have made many monel pops into flush heads. I can give more info if you're interested.

_________________
Bob Highley
N711SH
SN 835
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Bill Williams
 Post subject: Re: Flap Assembly
PostPosted: Fri Aug 24, 2018 3:30 pm 
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I have found that using an pneumatic rivet puller with 80/100 psi it will countersink itself into the countersink,


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Rich Brazell
 Post subject: Re: Flap Assembly
PostPosted: Fri Aug 24, 2018 5:15 pm 
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Location: Jamul, CA (San Diego area)
Cherry Max flush rivets . BING , BANG ,BOOM !!

RB O0


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jubal_sackett
 Post subject: Re: Flap Assembly
PostPosted: Fri Aug 24, 2018 6:40 pm 
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Many roads to Milpitas. Thanks

A discussion on how to reform monel pops to flush would be greatly appreciated.

On the cherry max, I used 020 for skin giving me total thickness of 045. I wasn't sure how rigorous to be on minimum grip length. Do you use the -2 for most of the wing skin/rib locations with accessabiity issues.


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fytrplt
 Post subject: Re: Flap Assembly
PostPosted: Sat Aug 25, 2018 12:02 am 
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Drill a countersink hole in a piece of steel that fits the rivet. Drill a hole the size of the pull shank in a piece of bar stock. Place rivet in countersink hole and place bar over the shank and whack it with a hammer. Voila! Countersink rivet.

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Bob Highley
N711SH
SN 835
KLAL


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Rich Brazell
 Post subject: Re: Flap Assembly
PostPosted: Sat Aug 25, 2018 10:29 am 
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Location: Jamul, CA (San Diego area)
I can't recall off hand the dash number of the CM rivet I used in those locations , but a -2 sounds about right . A CM rivet gauge will confirm that . The CM needs to be the right length to achieve the correct grip length to form the required formed "bulbed" head . Go to www.cherryaerospace.com , they have all the info on stalling these little gems . Ebay is your best bet for CM rivets . I found sealed packages of 100 for as little as $10.00 . :o Your rivet mileage may vary ! :P

RB O0


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jubal_sackett
 Post subject: Re: Flap Assembly
PostPosted: Sat Aug 25, 2018 11:26 am 
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Excellent, Thanks for feedback


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ljkrume
 Post subject: Re: Flap Assembly
PostPosted: Mon Aug 27, 2018 1:36 pm 
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Joined: Mon Oct 26, 2009 1:33 pm
Posts: 178
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Anyone building anything should be aware of McMaster-Carr. Easy to deal with online and they have a lot of stuff. Just be wise if you're substituting fastener strength in critical areas.

Les Krumel

https://www.mcmaster.com/


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