From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] 320/360 gear extension failure- a theory
To: lml
Date: Wed, 22 Dec 2004 16:22:27 -0500
Message-ID: <web-577205@logan.com>
In-Reply-To: <19d.2d131758.2efb282b@aol.com>
References: <19d.2d131758.2efb282b@aol.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"; format="flowed"
Content-Transfer-Encoding: 8bit

Posted for Sky2high@aol.com:
  In a message dated 12/22/2004 11:31:57 A.M. Central Standard Time,
  ian.crowe@sympatico.ca writes:
"""
  Re Scott's post of 12/21/04 I was fascinated to  see a figure of 25lb given
  as a test parmeter to determine the effectiveness  of the gas spring used 
for
  emergency extension of the nose gear.
  
  I presume that this is a calculated figure using  the lengths of the mving
  parts of the mechanism related to the 100lb gas  spring.  Could Scott tell 
us
  where this figure came from and whp  originally devised it.  I hafd been
fussing
  over the item on the annual  which calls for a test to verify the gas spring
  and had not as yet come up  with an in situ test. takung the gas spring off
to
  test it is a  pain.
"""
  
  Ian,
  
  As best I can remember, an LML list member did just such a calculation 
 based
  on the 100 pound spring and the "levers" thru which it acts for the  320/360
  short engine mount.  I do not remember the name and I am  unsophisticated in
  archive searches.  I actually use the in air test at 90  KIAS rather than 
the
  86 to check the spring.  Perhaps I should move that up  to 100 KIAS - no
worry
  if it pushes the nose gear out at that speed.
  
  No inner gear doors? - I would freeze my bippy unless I sealed the many
  holes in the cockpit closeout rib.  Besides that, the Spitfire had more 
 than
1000
  HP.
  
  Scott Krueger  AKA Grayhawk
  N92EX IO320 Aurora, IL  (KARR)