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Wing Spars Done! Bolts?

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jkafka(at)trojanuv.com
Guest

Posted: Wed Oct 10, 2007 11:34 am Post subject: Wing Spars Done! Bolts?

More than 3 years after starting them (there was a long break), my plans-built wing spars are done. For me this was a big deal because dealing with all those solid rivets (without a rivet gun) appeared to be one of the bigger hurdles in the way of eventual completion.  

To celebrate my minor success, I decide to get a photo of me posing behind the assembled structural “guts” of my 601XL-to-be. While assembling, I was unable to find direction in the plans or manual about the way the twelve bolts connecting the outboard spars to the center spar should face. Does it matter if the bolt heads are on the forward or aft side of the spars? Should one alternate them? What about the bolt at the root of the outboard spars and the ones in the center spar (in the plans the latter appear to have the bolt heads on the forward side).  

On to finish the remaining rear ribs!  

Jeff Kafka  

601XL Plans  

Tail, Flaps, Ailerons, Spars Done  

Working on Ribs & Assembling Wings   

Do Not Archive  

  

    

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Wed Oct 10, 2007 12:05 pm Post subject: Wing Spars Done! Bolts?

I put my bolts in with the nuts exposed on the front of the spar for 

easy inspection.



Kafka, Jeff wrote:

 	  Quote: 	
		   

 To celebrate my minor success, I decide to get a photo of me posing 

 behind the assembled structural “guts” of my 601XL-to-be. While 

 assembling, I was unable to find direction in the plans or manual about 

 the way the twelve bolts connecting the outboard spars to the center 

 spar should face. Does it matter if the bolt heads are on the forward or 

 aft side of the spars? Should one alternate them? What about the bolt at 

 the root of the outboard spars and the ones in the center spar (in the 

 plans the latter appear to have the bolt heads on the forward side).

 


	


-- 

Bryan Martin

Zenith 601XL N61BM

Ram Subaru, Stratus redrive

Do Not Archive

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_________________
--
Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Rick.Beckman(at)atk.com
Guest

Posted: Wed Oct 10, 2007 12:14 pm Post subject: Wing Spars Done! Bolts?

More than 3 years after starting them (there was a long break), my plans-built wing spars are done. For me this was a big deal because dealing with all those solid rivets (without a rivet gun) appeared to be one of the bigger hurdles in the way of eventual completion.  

To celebrate my minor success, I decide to get a photo of me posing behind the assembled structural “guts” of my 601XL-to-be. While assembling, I was unable to find direction in the plans or manual about the way the twelve bolts connecting the outboard spars to the center spar should face. Does it matter if the bolt heads are on the forward or aft side of the spars? Should one alternate them? What about the bolt at the root of the outboard spars and the ones in the center spar (in the plans the latter appear to have the bolt heads on the forward side).  

On to finish the remaining rear ribs!  

Jeff Kafka  

   

   My tech counselor told me that bolts go back, in, and down.  

                                                            Happy Building!!!!!  

                                                                        Rick Beckman  

   

                        Do not archive  

      [quote][b]

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dougsnash(at)yahoo.com
Guest

Posted: Wed Oct 10, 2007 12:23 pm Post subject: Wing Spars Done! Bolts?

Hey Jeff, sounds like a major milestone, congrats.



Keep in mind that I am a 701 builder and have no

actual data to base this advice on but standard

aircraft procedure dictates that the heads of the

bolts will be forward.  That way if the nut came off,

the slipstream would help hold things together.



Hope this helps in this application.



Doug MacDonald

CH-701 Scratch Builder



NW Ontario, Canada



DO not archive

--- "Kafka, Jeff" <jkafka(at)trojanuv.com> wrote:



 	  Quote: 	
		   More than 3 years after starting them (there was a

 long break), my

 plans-built wing spars are done. For me this was a

 big deal because

 dealing with all those solid rivets (without a rivet

 gun) appeared to be

 one of the bigger hurdles in the way of eventual

 completion.

 

 To celebrate my minor success, I decide to get a

 photo of me posing

 behind the assembled structural "guts" of my

 601XL-to-be. While

 assembling, I was unable to find direction in the

 plans or manual about

 the way the twelve bolts connecting the outboard

 spars to the center

 spar should face. Does it matter if the bolt heads

 are on the forward or

 aft side of the spars? Should one alternate them?

 What about the bolt at

 the root of the outboard spars and the ones in the

 center spar (in the

 plans the latter appear to have the bolt heads on

 the forward side).

 

 On to finish the remaining rear ribs!

 

 Jeff Kafka

 601XL Plans

 Tail, Flaps, Ailerons, Spars Done

 Working on Ribs & Assembling Wings 

 Do Not Archive


	


Don't let your dream ride pass you by. Make it a reality with Yahoo! Autos.

http://autos.yahoo.com/index.html

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bryanmmartin

Joined: 10 Jan 2006
Posts: 1018

Posted: Wed Oct 10, 2007 2:12 pm Post subject: Wing Spars Done! Bolts?

There are two guidelines for installing bolts. A. Install the bolt such 

that gravity or aerodynamic forces will tend to keep the bolt in place 

in case the nut falls off. B: Install the bolt such that the nut can be 

easily inspected for security.



Since the spar bolts are mounted horizontally inside the fuselage, I 

chose to make the nuts easy to inspect. I also did this with the bolts 

through the rear spar. I installed these bolts with the nuts visible 

from the rear when the flaps are lowered.

-- 

Bryan Martin

Zenith 601XL N61BM

Ram Subaru, Stratus redrive

Do Not Archive

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_________________
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Wed Oct 10, 2007 6:56 pm Post subject: Re: Wing Spars Done! Bolts?

Congratulations on reaching that milestone. Here is a picture of my solid riveting machine.

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FP01122006A0001K.jpg

Description:

Solid Riveting Machine.

Filesize:

145.61 KB

Viewed:

557 Time(s)

_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

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