From: RWolf99@aol.com
Message-ID: <fb.b47dd73.26f92fd0@aol.com>
Date: Tue, 19 Sep 2000 17:08:32 EDT
Subject: Forward Mounted Hydraulic Pump (LNC2)
To: lancair.list@olsusa.com
Reply-To: lancair.list@olsusa.com
Mime-Version: 1.0

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I have finally mounted the hydraulic pump between the instrument panel and 
the header tank, on the copilot side.  While I have not made the electrical 
and plumbing connections yet, that will be done shortly.

My objective was to get the hydraulic pump as far forward as possible, but I 
wasn't as smart at Marv, who cut out a section of header tank and placed the 
pump directly on the firewall.  I instead built a shelf which extends from 
the right hand fuselage sidewall to the nose gear tunnel.  There is an 8-BID 
flange on the sidewall supporting the shelf on the outboard side, and a pair 
of aluminum angles attaching the inboard side to the nose gear tunnel.  One 
angle is Floxed-3BID to the tunnel, just like the hydraulic dump valve 
bracket only slightly more forward.  The other angle bolts to the first one 
and again to the bottom of the shelf.  Six bolts on the right and four on the 
left.

The shelf top surface is level just below the fuselage longeron (It is 
actually level with the bottom of the slight indentation that extends about 
1/2 inch below the longeron) thus it is about two inches higher than the nose 
gear tunnel.  You cannot see the bottom of the shelf if you are sitting in 
the seat.

I made the shelf from 3/8 honeycomb prepreg with an additional 3 BID on each 
side.  There is a phenolic core where bolts pass through.  There is also a 
little tub made from 1/4 inch honeycomb which holds the hydraulic pump to 
catch any drips.  The Bosch relays will attach to the front of the tub.  The 
shelf, sans brackets and bolts, weighs two pounds.  (Yikes!)  The pump is on 
the inboard side and the outboard side will have enough room for a LightSpeed 
CDI control unit, a Vision Microsystems DPU and a Control Vision EXP2 power 
distribution system.  Basically a footprint 6x8 inches a little over 6 inches 
tall.  Yes, I have taken measurements with the glareshield in place.

The shelf is rated for a distributed load of 20 pounds at 40 Gs.  (Standard 
cockpit mounted equipment crash load.)  I didn't want the stuff to break 
loose and smash into my header tank if I crash.  If I crash at 41 Gs, I don't 
care if it then burns up.  (I'll be dead.)

I left a three inch gap between the instrument panel and the shelf.  I'm 
limited to small-depth instrumentation on the right hand side, but the Vision 
Microsystems gear and a Hobbs meter will fit.  So will switches and breakers. 
 Intercoms won't.

I'll send pictures as they become available, but I wanted to get the word out 
to anyone else similarly inclined.  Also to tweak all of you who said "it 
couldn't be done" -- which does not include Orin who was kind enough to say 
"Well, nothing's impossible" while rolling his eyes heavenward.  I also will 
write an article for the LNN, since my wife promises to actually read it if 
it gets published.  Maybe Marv can publish it in the swimsuit edition and 
REALLY get me in trouble!

Seriously, though, thanks for all the helpful suggestions.

- Rob Wolf
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LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.
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