I finally got around to finishing my ( new style ) cowling.

The current version of the manual is incomplete and incorrect. I used a combination of advise from Roger at Zenith, the forum and the HBH video.

Here is how I did it:

1) Fit the top and bottom halves together, sliding the top half into the lip. I then made sure the the seam between the top half and the recessed lip of the bottom half was OK.
2) Clamped and taped it together.
3) Determined the center of the top half of the cowl and the center of the airplane. I then extended forwarrd the rivet lines on the side of the fuselage to use as reference for getting it even.
4) I then determined the angle of the cowl and got it centered and even. I used the seam lines on the cowl in conjection with some rivet lines on the fuselage to get it even and centered.
5) Once I had that I then marked where I neeeded to trip the cowling to clear the gear leg and windshield. I only trimmed the gear leg hole a bit, the molding supplied a large amount of clearence. I trimmed a small a amount of the top cowling to clear the windshield and sealing.
6) Once I had the the cowl trimmed I then drilled and clecoed the front four holes to join the top and bottom halves. I determined my safe area of the fuselage flange taped the cowling into place and drilled the cowling into the fuselage flange. I made the holes A4 sized.
7) I removed the cowling. and clecoed the nutplates onto the bottom cowl for the forward holes. I put the nutplates on the "wrong" side so the barrel was pointing away from the plane.
8) I got each plate parallel with the lip of the cowl and drilled one hole with an A3 bit and clecoed. I then drilled the remaining hole.
9) Removed all the nutplates and drilled the center hole out to AN3.
10) Cleaned & deburred the holes
11) I applied a slight countersink to the A3 holes that hold the nutplate using a hand reamer. Use A3 blind rivets to secure the nutplates. Do not drill out the holes on the nutplates.
12) I drilled out the holes on the top cowling to AN5
13) Using a flat riveter head I riveted the nutplates to the inside lip of the bottom half so the barrel pointed into the airplane.
14) I clecoed the nutplates to the fuselage flange where the cowl met and used a similar technique.
15) At this point I did not install the left and right nutplates where the top and bottom halves of the cowling connect to the fuselage.

Wiring update:

Most of the wiring harness is complete. Lights, radio and utilities are done. The transponder, Dynon and alternator wiring remain.

To help reduce the clutter on the kitchen and workbench tables I started cutting the panel and installing parts.

Many months ago I mocked up my panel using lifesized print outs. This worked well, but many details were simply left out. Some of the parts of changed, and a few unexpected things have been added. There are more switches and breakers than I had planned for.

One challenge has been trying to plan around the throttle handle. The exact position of the throttle can not be determined with out the throttle bellcrank installed. Based on the expected position from other builders I have moved the Dynon more towards the centerline. I would prefer that the Dynon be centered with the pilot's seat, but that may be impossible.

When laying out there were a few factors I kept in mind.

1) Anything flight and emergency critical should be close to aircraft center. This is to allow the passenger access to the starter, ELT, ect.

2) Try to logically group switches by function

3) Keep power away from the primer.

4) Do not stack any switch above or below another.


I have also received my grips. The final choice was for FlightGrips ( no website ). These are a solid grip that bolt onto the Y stick.

Internally the switch poles are easy to access as the stick splits apart and the top cap is removable. You do need to be careful with how much heat shrink is used as to keep the wire flexible enough to route around the grip.

On the pilot's side there is a elevator trim up/down, PTT, Radio Flip/Flop, Radio Mem Set and intercom isolation.

On the passenger's side there is PTT and Radio flip/flop.

Saturday night saw three hours of progress.

The first draft of layout for the instrument panel was done. I found various pictures of the planed instruments and then printed them out at actual size. Some items got a hand drawn picture as a placeholder. A single piece of tape was used for each "instrument" or "control" to hold it onto the panel. Everything is very easily repositioned.

The instrument plane's flange was also drilled in preparation for the dashboard, and a piece of ("L") was drilled into place that holds the instrument plane at equidistance from the firewall.

I laid out and cut 7F14-2 per the plans, and had to open up the holes to make it fit well. The holes extend too far forward and are too wide at the inside to be a perfect fit. A much better plan would have been to cut a template from cardboard THEN use that to make the real piece. In the end I am going to cover the dashboard anyway with upholstery, but anyone wanting to keep it as bare metal may want to take precautions.

The big issue of the night was with the instrument plane and some ("L") angle that runs from it forward. The basic idea of the piece is to be even along the top edge with 7F14-3, the forward side skin. The problem is that a crimp in the flange of the instrument plane would interfere with it.

The obvious solution seems to move the ("L") down ~10mm, but since 7F14-6R ( aluminum plate ) is already drilled into position, I can not trim the side skin to be even. Given the size of 7F14-4 ( top skin ) there may be enough play for it to not matter.



PROGRESS:
Fuselage ~211h ( 3h, 3h, 2h, 3h, 7h, 2h, 5h, 2h, 3h, 2h, 2h, 3h, 6h, 2h, 2h, 1.5h, 2.5h, 1h, 2h, 3h, 2h, 3h, 4h, 1h, 2h, 1h, 3h, 4h, 3h, 3h, 4h, 3h, 4h, 4h, 6h, 3h, 3h, 4h, 2h, 2h, 2h, 4h, 2h, 2h, 10h, 4h, 4h, 6h, 3h, 4h , 6h, 3h, 2h, 2h, 5h, 2h, 3h, 3h, 2h , 2h, 3h, 4h, 1h, 1h, 1h, 1h, 3h )
Wings: ~157.5h ( 1h, 1h, 0.5h, 2.5h, 4h, 1h, 1.5h, 1h, 1.5, 4.5, 1h, 1h, 2h, 4h, 1h, 3h, 1h, 2h, .5h, 1.5h, 2h, 2h, 2h, .5h, 1h, .5h, .5h, 2h,3h, 1h, 3h, 3h, 4h, 2h, 3h, 7h, 3h, 1h, 4h, 1h, 1h, 1h, 4h, 2h, 2h, 2h, 2h, 1h, 2h, 3h, 2h, 1h, 3h, 2h, 2h, 1h, 2h, 3h, 2h, 1h, 1h, 1.5, 2h, 2h, 3h, 2h, 1h, 3h, 2h, 1h, 2h, 1h, 5h, 2h, 1h, 2h, 4h, 2h, 3h, 3h, 3h, 3h )
Flaperons: ( DONE! ) 23.5 hours spent ( 3h, 1h, 1h, 1h, 1.5h, 3h, 6h, 3h, 4h, 1h )
Paint Design: 2 hours spent ( 1h, 1h )
Elevator DONE!: ~31.5 hours spent ( 3h, 1.5h, 3h, .5h, 3.5h, 2h, 4h, 1.5h, 2h, 4.5h, 1h, 6h )
Horizontal Stabilizer DONE!: ~28 hours spent, 3 pieces replaced ( 3h, 2h, 2h, 2h, .5h, 1.5h, 3.5h, 1.5h, 5, 4.5, 2h, .5h )
Rudder DONE!, minus horn : ~16 hours spent, ( ~8h, ~8h )
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Total Done: ~473h

Spent three hours working on the instrument panel.

The gussets that join the panel to the cabin frame were fabricated and drilled into place. The panel bottom channel ( 7F15-1 ) was also drilled into place.

First I would suggest drilling the channel into the panel first. This gives you a better idea of where the gussets should go.

Despite some careful initial fitting and measurement, the gussets ( 7F15-2 ) are a little further inside that I would like. By centering the panel channel first you can get a better idea of where the radius of the gusset should be.

Also you will have to trim the top of the gusset so it can clear the panel. The plans call for a line at 75mm up, but try making the line at ~100mm. Of course, your milage may vary.

PROGRESS:
Fuselage ~208h ( 3h, 3h, 2h, 3h, 7h, 2h, 5h, 2h, 3h, 2h, 2h, 3h, 6h, 2h, 2h, 1.5h, 2.5h, 1h, 2h, 3h, 2h, 3h, 4h, 1h, 2h, 1h, 3h, 4h, 3h, 3h, 4h, 3h, 4h, 4h, 6h, 3h, 3h, 4h, 2h, 2h, 2h, 4h, 2h, 2h, 10h, 4h, 4h, 6h, 3h, 4h , 6h, 3h, 2h, 2h, 5h, 2h, 3h, 3h, 2h , 2h, 3h, 4h, 1h, 1h, 1h, 1h, 3h )
Wings: ~157.5h ( 1h, 1h, 0.5h, 2.5h, 4h, 1h, 1.5h, 1h, 1.5, 4.5, 1h, 1h, 2h, 4h, 1h, 3h, 1h, 2h, .5h, 1.5h, 2h, 2h, 2h, .5h, 1h, .5h, .5h, 2h,3h, 1h, 3h, 3h, 4h, 2h, 3h, 7h, 3h, 1h, 4h, 1h, 1h, 1h, 4h, 2h, 2h, 2h, 2h, 1h, 2h, 3h, 2h, 1h, 3h, 2h, 2h, 1h, 2h, 3h, 2h, 1h, 1h, 1.5, 2h, 2h, 3h, 2h, 1h, 3h, 2h, 1h, 2h, 1h, 5h, 2h, 1h, 2h, 4h, 2h, 3h, 3h, 3h )
Flaperons: ( DONE! ) 23.5 hours spent ( 3h, 1h, 1h, 1h, 1.5h, 3h, 6h, 3h, 4h, 1h )
Paint Design: 2 hours spent ( 1h, 1h )
Elevator DONE!: ~31.5 hours spent ( 3h, 1.5h, 3h, .5h, 3.5h, 2h, 4h, 1.5h, 2h, 4.5h, 1h, 6h )
Horizontal Stabilizer DONE!: ~28 hours spent, 3 pieces replaced ( 3h, 2h, 2h, 2h, .5h, 1.5h, 3.5h, 1.5h, 5, 4.5, 2h, .5h )
Rudder DONE!, minus horn : ~16 hours spent, ( ~8h, ~8h )
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Total Done: ~470h