Mailing List flyrotary@lancaironline.net Message #28060
From: Todd Bartrim <haywire@telus.net>
Subject: RE: [FlyRotary] Re: fuel/brake lines
Date: Fri, 2 Dec 2005 00:32:23 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Somehow, somewhere (RVlist I think) I'd learned that ATF was almost identical to this military brake fluid, but since it is much easier to get, is why I originally went with it. I'm glad to be done with that experiment.
DOT 5 is good to 550F, won't absorb water or harm paint like DOT 3&4, is readily available but is $35/litre. I've already replaced all the seals in my brake system with Viton, so compatibility shouldn't be a problem. So far the brakes seem to be perfect.
    I also read somewhere that (this list I think) that the short hose for a grease gun was perfect for the brake line to calliper. This sounded like a great idea and since we happened to stock a box of new ones at work for the oilers, I liberated a pair of them for use on my brakes. Unfortunately with the cold, I decided that it was a job that could wait until warmer weather and I didn't want to start an unnecessary job that would cut into any chance of flying. Any thoughts on weather this is still a good idea? Better than the ATF idea :-)?
 
Todd Bartrim    (I wish, I wish for a hangar for Christmas)
 
RV9Endurance
13B Turbo Rotary
C-FSTB
 
             "The world will always have a place for those that bring hard work and determination to the things they do."
Rusty,
 
I went with the new high flash point aircraft brake fluid (MIL-H-83282)- flash point is 450F vs 240F for the old stuff.   I had to get a gallon of the stuff (enough to probably last me for years and years and years), but after the fire, I feel a bit more comfortable that it won't go up with the temp a little over the boiling point of water.  I considered some of the auto brake fluids - but have heard some horror stories about incompatibility with aircraft seals - I know there is some DOT formulas that supposedly are compatible - but did not feel like experimenting {:>)
 
Ed
 
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