Mailing List flyrotary@lancaironline.net Message #24039
From: <Lehanover@aol.com>
Subject: Re: [FlyRotary] Ed Update..
Date: Fri, 17 Jun 2005 08:35:48 EDT
To: <flyrotary@lancaironline.net>
In a message dated 6/17/2005 12:50:02 AM Eastern Daylight Time, Dastaten@earthlink.net writes:
Anyways.. those are my questions.. tubing and fluid...
Any takers?

Dave

 
You could use a more modern hydraulic fluid rather than car brake fluid.
Even the old 5606 has a prety high flash point. Silicone brake fluid has far less a problem but requires more master cylinder volume to over come the spongy feel, and is thick and difficult to bleed. I use aftermarket Wilwood or Lockheed 570 to 600 degree wet boiling point race fluids. Never a problem even with the Carbon Metalic brake pads that flash the rotors to orange when cycled.
 
Most small calipers are sliders. Where there is a single piston pushing from only one side of the rotor. These calipers move when operated and there must be an accomodation for that movement in the mounting system. A single aluminum line all the way into the caliper will fail close to the caliper fitting.
 
Also the flex of a spring gear would add quite a bit of relative movement between the line and caliper. If the gear leg is rigid it needs only a short flex line right next to the caliper. If it can flex at the fuselage it needs one there also.
 
A length of dash 3 the whole length of the leg would be hard to beat for reliability. However adding flex line adds to spongy feel as well.
 
I run short flex lines in dash 4 to both rear calipers (4 2.00 inch pistons each) because even though these are rigidly mounted they still flex a bit and would fatigue a rigid brake line. 
 
Lynn E. Hanover
 
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster