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The reason I like my "fixer" module is that it
takes care of the problem without pilot intervention.
I like the idea of minimizing pilot
workload.
All other methods require the pilot to recognize
the problem, come to a conclusion what to, do it and hope that takes care of the
problem.
Wolfgang
Why not simply wire up a momentary switch which would close the pressure
switch contacts?
Angier Ames
N4ZQ
----- Original Message -----
Sent: Monday, April 04, 2011 2:40
AM
Subject: Re: [LML] Re: LNC2 Gear
Hydraulics
Chris,
Both sides of my system rise and fall with
temp...
This is why I installed a dump valve with an extra line that
dumps to zero pounds on both sides when opened rather than just equalize
and still be under pressure. I too used a wrench a few times to release
the pressure. I believe this condition is a little worse in my plane as
I replace the large factory supplied hose with small tight stainless
braid lines that most likely resist expansion more than the big factory
rubber hoses...
RS
"Flight by machines heavier than air is
unpractical and insignificant, if not utterly
impossible"
-Simon Newcomb, 1902
--- On Fri, 4/1/11,
Chris Zavatson <chris_zavatson@yahoo.com> wrote:
From:
Chris Zavatson <chris_zavatson@yahoo.com>
Subject: [LML] Re:
LNC2 Gear Hydraulics
To: lml@lancaironline.net
Date: Friday,
April 1, 2011, 8:34 AM
Keith,
You should never have to resort to wrenches
to get the wheels up –and that is not just speaking from a safety
perspective.
The following is an extract and renumbered set of
slides from a LOBO maintenance seminar on the 320/360 hydraulic
system. Slide 21 shows one possible explanation for
your system’s failure to retract.
http://www.n91cz.com/misc/LancairHydraulics-LML.pdf
Temperature changes will cause pressure to
go up and down, but should only affect the currently operating side of
the system. The non-operating side should be zero
and remain zero unless there is some other failure or configuration
issue. If both operating and non-operating
sides are affected by temperature – investigate.
Note that earlier vintage
pumps (~235 era) were internally different.
You may also find some of the following of
interest:
http://www.n91cz.com/Hydraulics/Lancair_Hydraulics.htm
Chris Zavatson
N91CZ
360std
www.N91CZ.net
From: Keith Smith
<keith.smith@gmail.com>
To:
lml@lancaironline.net
Sent: Thu, March 31, 2011
12:24:59 PM
Subject:
[LML] Re: LNC2 Gear Hydraulics
Quite possibly one of the
best posts I've ever read. Thanks, Tom, for taking the time so
share those experiences!
I recently experienced the inability
to raise the gear. A quick call to Rick Argente (Lancair owner/builder
in NJ) provided the solution...bleed the line. He said it's a common
issue when flying from cold locations (NJ) to warmer destinations
(Georgia).
I also get hear the pump activate in flight for a
fraction of a second every 20-30 minutes or so, which I suspect points
to a leak of some sort.
Keith
Smith
N360JH
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