Category Archives: Interior

Interior Panels

Now that the airplane has been moved to the airport and wings attached, final painting and installations can proceed.

Interior panels from Aerosport Products were primed with PPG DP48LF white primer.  Later the panels were painted PPG Concept Boeing Grey.

 

 

 

The foam backed, fabric material was glued into place on the Aerosport headliner with contact cement by professional auto specialists. (Don’t ask why I did not do this myself). The backing fiberglass was then fitted with Velcro strips and attached to corresponding strips on the canopy.

 

 

More views of the overhead console and installed headliner..

 

 

 

 

The left photo shows fitting the map pockets on the forward interior panels prior to prime/paint.  The right photo shows the baggage bulkhead after painting.

 

 

 

A Blue Seas power outlet was fitted onto the baggage bulkhead.  A 10A fuse and toggle switch for directing trickle charge power to either PRI or SEC battery were installed with switch guards.  This outlet is not intended for ever jump starting the aircraft.  The required EXPERIMENTAL decal was installed on the upper bulkhead cover.

 

The lower bulkhead cover was fitted with UHDP wear blocks for the rear shoulder harness cables.  The right picture shows a rear interior panel with the air vent cover installed.

 

 

Preparation of the Aerosport dashboard cover included installation of covers for the panel fan outlets and trimming the edges for fit.  After trim, I used my fledgling sewing skills to dress the edges against fraying.

 

 

The center console and control stick wiring was completed and tested.  Labelling of the jack ports was with a Brother P-touch. I would have preferred a laser etched alternative, but maybe than can be a future project.

 

 

 

The dashboard cover was secured with 1″ and 2″ Velcro strips.

 

 

 

 

Final dashboard cover, center console and control sticks installed…

 

 

 

 

Front and rear footwell carpet…

 

 

 

 

Rear seat and baggage compartment carpet…

Transparencies and Misc

The templates for masking the window transparencies have finally arrived.  The Avery Dennision BriteLine+ vinyl sheets were custom cut by Moody Aerographics specifically for this purpose.  I originally intended to mask off each window with just one vinyl piece, but matching the template profile on the curved surfaces with the exposed sticky adhesive proved too difficult for an amateur installer.  Instead I chose just to use the corners which lay flat, with electrical tape filling in the straight or slightly curves intermediate sections.

The left photo shows the raw templates on the main roll.  Before applying to the windows, an outline of each corner was traced on acetyl sheets.  The reason for retaining this contour will be shown later…

 

 

 

The left lower windscreen corner was raw fit with epoxy resin and SuperFil before priming.  The corner template mask was laid into the corner with about 1/8″ – 1/4″ offset from the underlaying canopy frame.  This offset will present a clean edge visible from within the cockpit.

 

 

The smoothly cut template mask was covered with two layers of electrical tape.  Each tape layer provided an additional 0.0063″ height for when the AlumiLite black dyed and glass bead infused West Marine two part epoxy resin was applied to the edge gap.  The resin will then be sanded carefully from layer to layer to reach the final height of the template mask.

 

 

TAPING DETAILS

The same general taping process was then applied to doors and windows.  The raw template mask in the corner was connected to other corners with red electrical tape.  The bright colors for the final tape layer were used to enhance visibility while sanding.  Notice the curved black electrical tape second layer.  This shape was rough cut using the acetyl sheet contour described above. Cutting the electrical tape in this manner helps it stay flat, as compared with trying to bend the tape around a tight corner.

 

Additional black electrical tape was applied above the straight sections, followed by general masking and one more layer of vinyl tape roughly laid around the perimeter.

 

 

 

These photos show the before and after initial application of the dyed resin for the front left door.

 

 

 

These photos show the rear left window progressing from taped outline, dyed resin applied, initial rough sanding, and final edge sanding.

 

 

 

The last sanding step levels the lowest tape layer with the resin material.  Since this is only about .006″ thick, the care needed to not rub through to the Plexiglass window is extreme. It took quite some time to achieve this on the windscreen, doors and windows. The sanding outcome so far looks good, but application of the primer and paint will show whether the preparations were sufficient.

 

 

OIL DOOR LATCH BUTTONS

The issue of the push buttons for the oil door has finally been addressed.  A #30 hole was drilled into the Camlock latch plate, then taped for a #6 screw.  A mock-up of the final buttons (yet to be fabricated) are represented by the washers on the right.

 

 

The Delta drill press and a V-block were used to drill a 1/2″ steel bar with a center hole.  That hole was then taped for a #6 screw.  The taped post held a piece of 1/8″ aluminum flat bar for shaping.

 

 

The blank was hand filed and then sanded to exactly fit into each latch hole. The sides were slightly rounded to self-center the button when the latch springs back to the closed position.  The final buttons were polished with 2000 grit sandpaper and fastened with #6 stainless screws. They will probably will be left as-is and not be painted, but that decision will be made later.

 

 

MISCELLANEOUS

The original plans call for an AN3 bolt to hold the steps in their cradle.  I wanted a stronger connection, so the steps and the cradles were drilled and reemed to 1/4″ to hold thicker AN4 bolts. (NAS-

 

 

The door alarm reed switches were connected to the main electrical bundle via DSUB connectors.  They are held together with heat shrink, then laced into place.

 

 

 

The main wiring bundles on left and right sides under the rear seat panels were laced together.  In retrospect I would probably rearrange some of the wire runs for a cleaner look, but the final result is secure and will be serviceable as needed for future maintenance.

 

The control sticks were cut to length to provide the maximum height without touching the instrument panel or switches.

 

 

 

 

Interior (3)

Terminating the headphone and microphone jacks was the last set of main actions needed for the interior fuselage electrical system.  What remained were cable lacing and those connections left for when the engine is mounted.

The center console cover plate and rear face of the armrest are the locations for the jacks.

 

 

 

 

The mounting components for the front plate are shown on the left.  The rear face mock-up is on the right.

 

 

 

 

The inner side of each jack location contains a backer plate with holes for the soldered wires and auxiliary devices. On the front plate are spaces for the Bose LEMO jacks and an auxiliary audio input.  The rear face includes a USB power connector with two ports.

 

 

 

Here the front cover plate is shown under the control quadrant.  Note in this photo the hole for the auxiliary audio input has not yet been drilled.

 

 

 

 

The console parts were laid on their side to trim ins a straight line as shown on the right.  The interior tunnel wiring with fuel pump and transducer wiring is shown on the left.

 

 

 

Preparing the headliner material for covering the fiberglass template included steaming to remove wrinkles and cutting to approximate size.  The attempt to cover the fiberglass with material once spray adhesive applied was a total disaster (no photos shown due to the embarassment factor). Fortunately the fiberglass templates were recovered. The covering job will be left for professionals.

 

 

Final configuration of the push-pull cables for the fore heater box, rear heater box, and oil cooler valve were also completed on both the interior and exterior side.  These were McFarlane MCU224-xx slip resistant cables in all cases.

 

 

 

The main ground wire under the pilot seat was encased in 7/16″ fuel line to further protect against chaffing against bulkhead parts.  This was probable not necessary given the clearance, but extra precautions for this critical matter were taken.

Interior (2)

Further development of the interior included shaping the headliner backing and configuring the center console/armrest.

A tracing of the side window outline was laid against the fiberglass headliner template from Areosport Products. The fiberglass was rough shaped to the window contours, then finalized when test fitted into the canopy.  Further actions include additional shape refinements and covering the fiberglass backer with grey headliner material.  The lower side panels may also need relief to accommodate the thickness of the headliner at the longeron edge.

 

 

On the left are #8 ClickBond nutplates being glued into place.  Regular riveted nutplates could have been used here, but I wanted to avoid additional hole penetrations on structural elements whenever possible. On the right are holes cut into the forward center tunnel covers for heater cables and the AUX COMM connection.

 

 

A .060″ stainless backing plate was made for the heater push-pull cables.  They require a D-shaped hole to keep the cable from rotating. Since I was not confident the carbon fiber side panels could withstand the stress without cracking, the approach to spread the forces across a larger area was taken.

 

 

 

Here the Aerosport center console cover was rough fitted to the SteinAir control quadrant plate to the top and to the armrest base on the bottom.  Particular attention was paid to where the fuel selector valve would be located. Notice the small lower seam between the center cover and the armrest base.  This was achieved with a very slight tilt of the cover against the quadrant plate.

 

 

Once the test fit of the quadrant plate was complete, the 3/4″ holes for the control cables were made with a Unibit in the drill press.

 

 

 

 

The throttle cable was checked in the quadrant plate before completing the remaining holes.  The photo at right shows the mounting plate for the center console provisionally attached to the now permanently installed quadrant plate.

 

 

 

The mounting plate viewed from the front and with the center cover in place.

 

 

 

 

Next was drilling and fitting the Andair fuel valve selector in the lower armrest base. This was done very carefully and required about 6 hours to complete. The #10 screws shown in these photos are too high, interfering with the rotation of the selector.  They must later be replaced with others with a lower head to allow freedom of movement.

 

 

Here are interim view of the armrest, center console, side covers, and lower instrument panel. Up next are fitting the control cables, layout and installation of headphone/microphone jacks in the center console, armrest adjustments and other final configurations above the tunnel.

 

 

Interior (1)

Interior panels from Aerosport Products were fitted throughout the main cabin.

The rear panels were taped into place for initial fitting.

 

 

 

 

After sanding to fit the cabin dimensions, mounting holes were drilled to secure the panels in place.  Due to there structural rigidity, only a few screws were needed for each panel.

 

 

 

Once the panels were complete, fitting the rear air vent deflectors was undertaken.  A test fit of the 3D-printed deflector highlights the relative position to the default Vans hole.  A tracing from outside shows the indicated Aerosport cut line not aligned with actual location.

 

 

To correct for the actual location of the opening, a probe hole was first opened in the panel.  This was hopefully near the middle of the vent hole.  A file was then used to manually relieve the panel material until just the deflector opening was exposed.

 

 

 

The vent grate is clipped into position with small tabs around the inner edge.  As a result the tolerances for the hole opening are fairly tight. While it took some time to hand file the holes, the alignments and fit are quite good. Minor adjustments are still needed for the vent lever position, but the main rear panel work before painting was done.  Next up is the cabin headliner.