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<< Lancair Builders' Mail List >>
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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
LML Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
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