From: RWolf99@aol.com
Message-ID: <4cc26f71.3690e24e@aol.com>
Date: Mon, 4 Jan 1999 10:46:22 EST
To: lancair.list@olsusa.com
Subject: Construction Manuals
Mime-Version: 1.0

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Regarding Angier's question about landing gear schematics -- revision dated
1997.  I looked up the schematic in my manual (I had just been examining it
yesterday, coincidentally) and find I have a 1991 revision.  This drawing
still shows cutting off the hydraulic power pack ground wire, though we should
all know that even the factory recommends using this as the relay ground.
(Ref:  Lancair Mail Newsletter 4th qtr 94).  

The pretty illustration in the manual was wrong -- it showed the wire from the
high pressure switch going to the gear down switch (rather than to the gear up
switch).  The schematic, however, was correct.

The more general question is how valuable a newer version of the manual would
be?  What is the current revision, anyways?  Amber Riddell sent me a new
horizontal tail chapter last year, but that's all I've gotten since I received
my original manual in October 1993.  Most of my pages are dated 1991.

I have no objection to paying for updates -- has anyone done this?

Rob Wolf
rwolf99@aol.com


[I have received the revised pages dated 4/10-15/97 via fax from Doug 
Weeldryer and will get them scanned in and uploaded to the Attachments 
section of the LML homepage this evening.  The wiring which was discussed
here a short time ago, which incorporated the isolation of the relays'
grounds via the black wire out of the pump is applicable to older pumps
only (Large green and blue wires, small black wire).  The new pumps 
(large green, blue, and black wires) have built-in internal overload and
overtemp sensors which cutoff power to the pump motor and the black 
wire is the pump ground, so no case ground is required on these new
units, nor is it necessary to isolate the relays' grounds.

While the test for old pump vs new pump by comparing the size of the
black wire seems pretty foolproof, I, for one, would be much happier with 
a more positive means of identification.  I'm relatively sure I have 
the newer pump style (took delivery of my kit at Sun'n'Fun, '97) as the
black wire on it is fairly large, but not the same gauge as the blue and
green wires, even though it has a 5/16" ID ring terminal attached to
it.  I would think there would be some change to the pump part number
or a cutoff serial number identifying the last of the old style pumps.

As for the wiring to the switch, it would be wise to verify the its 
internal workings before wiring it into ones' system... a simple 
continuity check between the terminals will tell which terminals 
are closed with the switch in either position.  I'll check the operation
of the switch which came with my kit when I get to the shop, but I 
wouldn't be surprised to find the upper terminals closed with the 
switch handle in the down position, just as is shown on figure 14-17.

   <Marv>]