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Re: [Fwd: Re: brake/rudder]

I am picturing a pressure sensor screwed in line on the master cylinders
that can be calibrated to the static brake pressure after bleeding.  Then
any change +- some variance produces current that drives a small piezo
speaker in the panel with a unique sound (different from stall warning
sound) that allows pilot to back off the pedals.  Can anyone with an
electronic background concur?  Could this be made from off-the shelf
electronics components available from Digi-Key, etc.

Greg Otto
Plano, TX
DMO 150

Jeff Barnes <jcbarnes@ibm.net> on 05/05/98 02:34:18 PM

Please respond to jcbarnes@ibm.net

To:   reflector@awpi.com
cc:    (bcc: Greg Otto/CONTRACTOR/DALLAS/CYRIX)
Subject:  [Fwd: Re: brake/rudder]

RE-POST: (I mistakenly sent directly to dohayes@juno.com instead of

Message-ID: <354E9065.463@ibm.net>
Date: Tue, 05 May 1998 00:07:01 -0400
From: Jeff Barnes <jcbarnes@ibm.net>
Reply-To: jcbarnes@ibm.net
Organization: JCB Enterprises, Ltd.
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To: dohayes@juno.com
Subject: Re: brake/rudder
References: <19980504.190134.3734.0.dohayes@juno.com>
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dohayes@juno.com wrote:
> ...I have planned on adding a brake activation light to avoid the
> latter, but haven't decided exactly how yet.
> 1) Magnet/reed switches on the brake push blocks or somewhere on the
> rudder arms
  I humbly defer to checked out Velocity Pilots and builders who are at
and beyond the rudder/brake assembly point because I could be totally
full of beans), but instead of a light, which I'd rather not be looking
for during a landing, what about adding a spring on the brake push block
  What I'm looking for is the "feel" that I've engaged my brakes as I go
past full rudder deflection.
  I understand that as airspeed goes up so does rudder pressure. As long
as rudder pressure at to/Lndng speeds is a lot less than that at cruise,
the BRAKE spring should cause noticeably greater pressure, giving us
mechanical feedback or "feel" that we're not justing moving a rudder
  I haven't disassembled our master/brake cylinders, but for cars
there's springs inside the Master, and/or return springs inside drums
and/or behind the pedal that do 2 things: 1) insure brakes are OFF when
pedal pressure is removed, 2) and give us feedback thru our legs so we
know how hard we're on the pedal.
  Would that work ?
Jeff Barnes
  I realize