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  #11  
Old 01-14-2018, 06:54 PM
alpinelakespilot2000 alpinelakespilot2000 is offline
 
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Quote:
Originally Posted by Kyle Boatright View Post
I've never disconnected the hard line to replace pads. Do you have a service loop down near the caliper like called for in the plans? That gives you the ability to pull the caliper loose to change the pads without disconnecting any hydraulics.
Ditto what Kyle said. Maybe a bit of exaggeration, but this seems like a solution in search of a problem.
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Last edited by alpinelakespilot2000 : 01-14-2018 at 07:01 PM.
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  #12  
Old 01-14-2018, 07:09 PM
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My 1978 C-152 had hard aluminum lines to the brake caliper's from the factory. Very similar installation as the Van's per plans method. Good enough for Cessna and 40 years of service, good enough for my Van's RV. Light and simple.
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  #13  
Old 01-15-2018, 01:27 AM
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Originally Posted by 9GT View Post
My 1978 C-152 had hard aluminum lines to the brake caliper's from the factory. Very similar installation as the Van's per plans method. Good enough for Cessna and 40 years of service, good enough for my Van's RV. Light and simple.
Maybe, but I bet they were 5052 aluminum rather than the softer 3003 tubing that Vans supplies. Not a good comparison.
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  #14  
Old 01-15-2018, 08:39 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Originally Posted by az_gila View Post
Maybe, but I bet they were 5052 aluminum rather than the softer 3003 tubing that Vans supplies. Not a good comparison.
Maybe, but decades of good service history on thousands of RV's built with the supplied line material indicates that it doesn't matter......

In fact, for those always interested in doing what they think makes it better (whether there is a well defined issue or not), the softer tubing might actually be better in this location since it does have to be flexed when the calipers are disengaged for brake pad replacement.
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  #15  
Old 01-15-2018, 09:39 AM
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Originally Posted by rvbuilder2002 View Post
Maybe, but decades of good service history on thousands of RV's built with the supplied line material indicates that it doesn't matter......

....................
Unless they were built with the original factory supplied plastic tubing that went down the gear leg all the way to the brake caliper.

That version didn't last too many years IIRC.
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  #16  
Old 01-15-2018, 09:44 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Quote:
Originally Posted by az_gila View Post
Unless they were built with the original factory supplied plastic tubing that went down the gear leg all the way to the brake caliper.

That version didn't last too many years IIRC.
I should have clarified that I was talking about comparing to the kit supplied aluminum line........
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Last edited by rvbuilder2002 : 01-15-2018 at 09:58 AM.
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  #17  
Old 01-15-2018, 09:44 AM
rv7charlie rv7charlie is online now
 
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"Unless they were built with the original factory supplied plastic tubing that went down the gear leg all the way to the brake caliper.

That version didn't last too many years IIRC.
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Half completed RV-10 QB purchased
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Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ"


But that's not what we're talking about, is it? Why muddy the waters?
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  #18  
Old 01-15-2018, 10:08 AM
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But that's not what we're talking about, is it? Why muddy the waters?
It shifted from specific tubes to customer changes to the original factory specified parts.

In the aluminum tube case there must be an engineering reason certified planes all use 5052 tubing rather than 3003.
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  #19  
Old 01-15-2018, 10:53 AM
rv7charlie rv7charlie is online now
 
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Quote:
Originally Posted by az_gila View Post
It shifted from specific tubes to customer changes to the original factory specified parts.

In the aluminum tube case there must be an engineering reason certified planes all use 5052 tubing rather than 3003.
Again, muddying the waters. By that logic, there's an engineering reason certified planes all use certified alternators, etc, etc, and that makes *all* of Van's choices of non-certified parts/components invalid. Not to mention all the non-certified 'clone' engines being run on RV's.

The question was related to convenience of adding a length of flex line (strictly for changing brake pads) to avoid flexing the spec'd hard line, and whether flexing the hard line to service the brakes is an issue. The answer is, the Van's-spec'd tubing has worked fine in thousands of planes for decades, but other stuff (both 'certified' and non-certified) works fine, too, if that's what floats your boat & you don't mind the added weight and expense, or you don't trust your (or the builder's) hard line fabrication skills.
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