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  #1  
Old 01-15-2009, 08:20 AM
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bacstabber bacstabber is offline
 
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Location: Pensacola, FL
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Default Parking Brake control in a RV-8A installation

I am getting ready to install my brake system. My questions concern the installation of the parking brake. In the past, others have shown their parking brake installation methods. But as of yet, I have not seen any posts or pictures of ways to control the lever position except by moving it directly with your hand. Has anyone devised a means of positioning the brake lever with a locking cable or other means? Pictures sure would help. Also, I like the idea of one poster who included a micro switch into his installation. If anyone can give suggestions about how this can be done and what switches are to be used, it would sure help this novice.
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  #2  
Old 01-15-2009, 09:03 AM
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N941WR N941WR is offline
 
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Default

Jack,

While not on an -8, here are some pictures of how I did it in my -9:
Parking brake mounted on the firewall and cable termination:


T-handle brake cable passing through the instrument panel:


The T-handle is placed right next to my steam gauge airspeed indicator and is very noticeable if it is out and locked. No need for the complexity of a warning light in this installation, IMHO.
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RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
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Last edited by N941WR : 01-15-2009 at 09:07 AM.
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  #3  
Old 01-15-2009, 09:23 AM
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bacstabber bacstabber is offline
 
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Default

Thanks Bill for the quick reply. The the installation on an 8 is different but your pictures do help me to understand how to use the T-Handle cable control. Thank you
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  #4  
Old 01-15-2009, 09:27 AM
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N941WR N941WR is offline
 
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No problem, happy to help.

The only real problem I had was figuring out which way the thing locks. For some reason my parking brake works backwards from what the instructions indicated. The fix was to move the cable end down.

One thing of note, the sheathing on the cable end works as my stop to keep the lever from going over center.
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RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
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www.repucci.com/bill/baf.html
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  #5  
Old 01-15-2009, 02:38 PM
scsmith scsmith is offline
 
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Default My -8 installation

I mounted my parking brake valve on the edge of the bulkhead where the flex hoses come up and transition to the hard lines. I thought for a long time about how to operate it with a cable.

I ended up making a bell crank that attaches to the bulkhead above the valve, with a connecting rod down to the arm on the valve. Then, I use a ACS-740 ( IIRC) control cable that comes out at the bottom edge of the instrument panel in the middle of the airplane. This control has the push-lock feature in the knob of the control cable, so the brake will stay where you put it.
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  #6  
Old 01-15-2009, 06:36 PM
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Default How it works!

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  #7  
Old 01-16-2009, 02:10 PM
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bacstabber bacstabber is offline
 
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Steve,
Do you have any pictures of your bellcrank setup?
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  #8  
Old 01-16-2009, 10:31 PM
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Default Same, sorta

Quote:
Originally Posted by scsmith View Post
I mounted my parking brake valve on the edge of the bulkhead where the flex hoses come up and transition to the hard lines. I thought for a long time about how to operate it with a cable.

I ended up making a bell crank that attaches to the bulkhead above the valve, with a connecting rod down to the arm on the valve. Then, I use a ACS-740 ( IIRC) control cable that comes out at the bottom edge of the instrument panel in the middle of the airplane. This control has the push-lock feature in the knob of the control cable, so the brake will stay where you put it.
I mounted mine in the same place, but ran the cable to direct overhead from the left side of the fwd cross-brace. No need for the bellcrank but did need to make/install some brackets to adel clamp the cable as necessary. Not yet finished, so not currently installed in the place, but should work ok (used the same pushbutton cable, cut to required length).
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  #9  
Old 01-17-2009, 12:52 AM
scsmith scsmith is offline
 
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Default I'll try to get a picture this weekend

I'll see if I can figure out how to upload a picture of the bellcrank. It will be my first.
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Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Jan 2020
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