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( CH701 ) 1mm tolerance for the elevator tip ribs?

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john.marzulli(at)gmail.co
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Posted: Tue Jul 11, 2006 1:02 pm Post subject: ( CH701 ) 1mm tolerance for the elevator tip ribs?

So the directions are telling me to take special caution to ensure a 1mm tolerance for drilling 7V6-3 to the elevator spar. Does anyone have a good way of doing a sanity check against the measurements? Honestly 1mm is really a tight tolerance, that's less than the width of  a sharpie line AND it could be really easy to be neither accurate or precise with a tape measure over that long a distance. 



Is this tolerence due to the skins being pre-drilled?

Thanks,



-- 

John in Seattle

http://701Builder.blogspot.com/

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dougsnash(at)yahoo.com
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Posted: Tue Jul 11, 2006 2:38 pm Post subject: ( CH701 ) 1mm tolerance for the elevator tip ribs?

I am currently scratch building my second

elevator(don't ask what happened to version one).  The

main reason that I can see for being careful with the

length is that the evlevator must fit snugly between

the hinge plates at the end.  If it were too long it

would bind.



When you get to the skin I have a couple of tech tips

for you.  Firstly, if you duct tape 3/4 x 1.5 x 7 ft

strips of wood to the 016 skin at the top side and

bottom side, it adds significant rigidity to the skins

and help prevent dreaded smiles by spreading out any

forces applied to the skin.



Secondly, the instructions are a little vague on the

match point for the bend at the nose.  In one section

it refers to the "leading edge" point.  In the skin

assembly section it refers to it as the radius center.

 They are the same point.  Be very careful with lining

this up since it will directly affect the trailing

edge fit.



Also, I personally recomend only drilling a couple of

holes in the elevator skin at first.  Attach the skin

to the skeleton at only these two spots.  Then use a

string or flexable drafting edge to follow the path of

the skin and compair the position of the trailing

edges.  They must meet evenly.  I hope this

description makes more sense to you than it does to

me.



Doug MacDonald

NW Ontario, Canada

CH-701 scratch builder

rudder, stab, and most of an elevator



Do Not Archive



__________________________________________________

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john.marzulli(at)gmail.co
Guest

Posted: Tue Jul 11, 2006 3:20 pm Post subject: ( CH701 ) 1mm tolerance for the elevator tip ribs?

Thanks for the tips.



-John in Seattle



On 7/11/06, MacDonald Doug <dougsnash(at)yahoo.com (dougsnash(at)yahoo.com)> wrote:  	  Quote: 	
		  --> Zenith-List message posted by: MacDonald Doug < dougsnash(at)yahoo.com (dougsnash(at)yahoo.com)>



I am currently scratch building my second

elevator(don't ask what happened to version one).  The

main reason that I can see for being careful with the

length is that the evlevator must fit snugly between 

the hinge plates at the end.  If it were too long it

would bind.



When you get to the skin I have a couple of tech tips

for you.  Firstly, if you duct tape 3/4 x 1.5 x 7 ft

strips of wood to the 016 skin at the top side and 

bottom side, it adds significant rigidity to the skins

and help prevent dreaded smiles by spreading out any

forces applied to the skin.



Secondly, the instructions are a little vague on the

match point for the bend at the nose.  In one section 

it refers to the "leading edge" point.  In the skin

assembly section it refers to it as the radius center.

 They are the same point.  Be very careful with lining

this up since it will directly affect the trailing 

edge fit.



Also, I personally recomend only drilling a couple of

holes in the elevator skin at first.  Attach the skin

to the skeleton at only these two spots.  Then use a

string or flexable drafting edge to follow the path of 

the skin and compair the position of the trailing

edges.  They must meet evenly.  I hope this

description makes more sense to you than it does to

me.



Doug MacDonald

NW Ontario, Canada

CH-701 scratch builder 



	


-- 

John Marzulli

http://701Builder.blogspot.com/

- The Matronics Zenith-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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