electric spaghetti

 

Wiring up electrical systems gives me the ‘heebie jeebies’ – I’m never very sure whether the sneaky little electrons will go where I want them to go or if the wires will suffer a melt-down (thereby letting ‘the smoke get out’ of them).
I’d already spent hours on the computer working on wiring diagrams – colour-coded wires, switch banks, earth buses, filtered avionic supply, etc. That’s all very nice, but eventually someone has to cut
actual wires and crimp on actual connectors. I’ve sat at the nose of the Shadow for quite a few hours tentatively cutting, labelling and crimping. After the first session, I’d done five wires, and only made two mistakes! One was too short. Another had the wrong label.

 

The final result is OK I think, but needs a better way to support the bundle of wires.

centre section covering

Now completed the covering of the wing’s centre section.
With the help of my brother-in-law and his wife, we flipped the fuselage/wing centre upside down (and carried it back into the workshop) so I could work on the underside of the wing stub. It was very easy to cover it with lightweight Poly-Fiber fabric and then gently heat shrink it smooth. I was pretty pleased with the zipped access panels that I’d sewn in before gluing the fabric on.
The brushed-on sealing coat was Wattyl “Solagard Gloss” water-based roof paint (with Floetrol conditioner) thinned with BarsBugs. This flows across and through the weave, gripping the polyester fibres much better than conventional fabric sealers. Next were several sprayed coats of Solagard Gloss/Floetrol thinned with water.
My brother and I carried the inverted fuselage/wing centre out of the workshop and flipped it back onto its wheels. Then, I could cover the top surface of the wing’s centre section. It took some ingenuity to sew and glue fabric shelves along each side of the tail boom, so that I could eliminate the foam shapes that normally surround the boom as it exits the centre section.

I also fitted the underwing luggage locker. It’s a hinged divinycell tub, which can hold a sleeping bag and small tent. In the open position it give easy access for connecting the port-side aileron pushrod. When its closed the luggage is prevented from fouling the pushrod.  The starboard-side aileron pushrod is accessed thru the zips mentioned above. There is a 28 litre fuel tank above and aft of the pushrod, which more than doubles the Shadow’s range.

it’s starting to look like an aircraft again!

Today I wheeled the Shadow out of the workshop and took some photos to show progress on my re-build. It’s looking like an aircraft again.

It’s been a satisfying couple of days. Yesterday I’d attached the wing centre section and tail boom to the fuselage. Obviously the undercarriage had been mounted underneath to hold it off the ground.

Over the past week I’ve been able to tick off a whole bunch of tasks from my list, including assembling the polyurethane flexi-rod tail skid, mounting the fuel transfer valve with its on/off control rod, crimping the limit wires for the rudder pedals, nose-leg suspension and flap lever. In addition, I have sprayed the instrument panel black, made the polycarbonate side windows and finished sanding the  leading edge of the wing centre section.

Very pleasing to see this amount of progress in a week.

main undercarriage mounted on 40mm fibrelam spacers (to gain more prop clearance)

 

Main suspension with stronger ‘carry-thru’ (not butt welded) axles and upgraded pultrusion rods (made from Plexinate P-100 polyurethane resin with 73% glass content)

upgraded nose-leg with machined spacers, adjustable retaining strop and welded webs (supporting the trailing arm pivot)

fuel transfer valve (wing tank to main tank) – 3/8″ bore shifts 28 litres in 10 mins