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701 Brake Lines

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txpilot

Joined: 26 Feb 2007
Posts: 87
Location: Houston, TX

Posted: Sat Jun 23, 2007 6:09 pm Post subject: 701 Brake Lines

I'm in the process of putting the brake lines in my 701.  I have drilled a hole in the cabin floor as noted on the bottom diagram page 7-F-9 and installed a grommet.  The problem is the bend required to make the brake line go under the seat, through this hole, and around to the back side of the main landing gear spring is quite a sharp bend.  It seems like this sharp bend will eventually stress out the brake line.  (I have the 'old' style gear spring that attaches onto forks).



I'm thinking about installing two 90 degree elbows - one above and one below the cabin floor, to make a 'Z' bend.  Has anyone else tried this or has a better suggestion how to handle this?  If the 'Z' bend works, how can I secure the elbows to the cabin floor?



Thanks,



Dan Ginty

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larry(at)macsmachine.com
Guest

Posted: Sun Jun 24, 2007 6:06 am Post subject: 701 Brake Lines

Dan,

Look carefully at "bulkhead fittings" which are either straight, 

45-degree or right angle.  I'm sure

one of these will help you grab the sheet and get to the other side 

without difficulty.



Larry McFarland 601HDS at www.macsmachine.com

txpilot wrote:

 	  Quote: 	
		   



 I'm in the process of putting the brake lines in my 701.  I have drilled a hole in the cabin floor as noted on the bottom diagram page 7-F-9 and installed a grommet.  The problem is the bend required to make the brake line go under the seat, through this hole, and around to the back side of the main landing gear spring is quite a sharp bend.  It seems like this sharp bend will eventually stress out the brake line.  (I have the 'old' style gear spring that attaches onto forks).



 I'm thinking about installing two 90 degree elbows - one above and one below the cabin floor, to make a 'Z' bend.  Has anyone else tried this or has a better suggestion how to handle this?  If the 'Z' bend works, how can I secure the elbows to the cabin floor?



 Thanks,



 Dan Ginty

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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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ruruny(at)aol.com
Guest

Posted: Sun Jun 24, 2007 12:50 pm Post subject: 701 Brake Lines

Dan,

 

 I'm wondering why Zenith changed this without providing 90 deg elbows. If you do this you could 

 just bend a small piece of .025 aluminum drill 2 holes for rivets to mount to floor and a larger hole

 with the proper grommet to support the 90 deg elbow should work good. I did a similar thing

 with fuel lines and electrical wires to support them. I did my brake line the old way(out the side) but it leaves the line open to be caught by a foot getting into the airplane, probably why they changed it.

  http://www.701builder.com/electrical10.htm this page shows how my line takes a more gradual turn and does not intefere with the rudder cable or anything else.

 http://www.701builder.com/fuelsystem04.htm this page shows the bracket to support the rubber fuel hose under the pilots seat. Scroll down a few pics.

 http://www.701builder.com/07WingLines.htm this page shows the same thing supporting pitot, fue, and electrical lines. Theres no reason why a 90 deg elbow could be mounted here and the line going straight down. You could make one above and one below, with the line going thru the grommet.

 

 I don't see the possibility of doing a gradual turn up and down  without intefering with the seat bottom

 or somthing else.

 

 hope this helps some.

 

 Brian

 Long Island, NY

 

 

 

 

 

 I'm thinking about installing two 90 degree elbows - one above and one below the

 cabin floor, to make a 'Z' bend.  Has anyone else tried this or has a better

 suggestion how to handle this?  If the 'Z' bend works, how can I secure the elbows

 to the cabin floor?

 

 Thanks,

 

 Dan Ginty

 

    AOL at AOL.com. 

  [quote][b]

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