So... I'm back to work on the Essex. Using the pattern, I cut a piece of 1/32" aircraft play, and glued it to the underside of the flight deck. Before doing this I further prepared the FD by scraping of the no-longer-needed aluminum foil and grinding down the remains of the standoffs from my now defunct first attempt. I used MicroMark Pressure Sensitive Adhesive to hold the ply to the styrene, but saw that it wasn't going to stay attached due to some warpage and the raised bumps of the kit's joint fingers. To make sure it didn't go anywhere I sealed the edges with thin CA. That did the trick.
I quickly realized that my pattern left out one major detail; the hole for the forward in-deck elevator. This really doesn't matter if I decide to build with the elevator in the up position, but I'd like to have the option. I first routed out most of the wood with a 1/16" carbide router in the Flexishaft, and then took the remainder away using a 1/4" Dremel sanding drum. I tapered the ply back from the elevator opening's edge so it wouldn't be seem from the outside.
I didn't put an LED forward of that elevator for two reason; it was overkill and there wasn't much room to run the foil around that elevator. There will be PLENTY of light.
In fact, lighting could to be so bright it's going to look like the Essex crew is growing marijuana in a greenhouse. I will also have to make sure that the paint film is thick enough to prevent all that light from showing through the hull sides. I may want to spray the insides first with Tamiya Primer, but it's solvent-based and that means I might have to paint it outside. I can get away with little, quick spray jobs in the basement, but nothing of this side. It would smell up the whole house. And the weather outside is still not good enough for outdoor spraying. It's either the cold, the wind or both.
I cut the 1mm gaps after all the foil was down, but not burnished with a new #11 blade. I used a Burglar-alarm-foil-corner trick to not have to so more foil joint than I had to, but did have to solder the joints where the other LED strips intersected the main feeder. This is a parallel ciruit becuase of the small 5 VDC transformer driving it. Two in series would drop 6 volts and underpower the LEDs. Before soldering I burnished the tape down so it was firm, flat and smooth.
I soldered the joints and applied tinning to both sides of the LED gap. I then placed and soldered all the LEDs. Before doing that I tested each to make sure they all were good. I then tested each circuit strip to make sure that the solder joints were secure. I did find one that wasn't fully soldered on one end and fixed it. I also blew one out when I inadvertently used my un-protected negative lead to test instead of the lead attached to the 470 ohm resistor. Getting direct 12VDC with no limiter guaranteed that that the LED lasted about 1/2 second. It burned out so fast I almost didn't catch the slight flash before it was no more. I replaced it with another and took more care picking which test lead I was using. I have the bare lead to test LEDs that are already protected by a current limiter, and the one with the resistor to test bare LEDs.
I've run out of 26 gauge black wire (it was wonderful wire that I bought a Conrad when I lived in Düsseldorf, Germany) so I'm substituting green for the negative leads. The wire has many, very fine strands so it's very flexibel and solders beautifully. I found materials that I bought in Germany for building my railroad were all superior. That includes wiring, lumber, plywood and fasteners. They had a great no-drill-needed wood screw with Torx head brand call SPAX that were the best wood screws I've ever used. They now sell them at selected Home Depot stores. My model railroad has literally used thousands of these.
There are four negative leads since each gets the 39 ohm resistor and there's one + lead since it feeds all the parallel circuits.
Notice how little solder is necessary to hold these joints. The wire is a good example of a mil-spec solder joint. You must be able to still see the conductor in the solder joint and there are concave slopes of solder up to the top of the conductor. This image shows that the joint is fully wetted and that solder and substrate have become one. If there was a convex blob over the joint one couldn't tell if the solder was actually adhered to the copper. In fact, it probably wouldn't be and might be held only with hardened rosin flux. A shock or vibration could seperate the joint and lead to failure. The same goes for the LED joint itself. After tining, I apply heat to the copper foil and watch the solder melt and the LED settles down nicely. Once the FD is glued down there will be NO way that any repairs could be made. It must be bullet proof.
I had to run the wires down through the brass conduit that I put in several weeks ago, and I just guessed about where that would be when I bundled the wires together for passage. I used thick CA to form small wiring clamps to hold everything neatly. As it worked out, I guessed perfectly. The bundled comes down directly over that brass tube. Whew! Sometimes you win one. You won't be able to see the wiring or lights when the ship is buttoned up.
Four wires just fit through, but the + lead wouldn't, so I drilled a second hole through both levels of the plastic and inserted a smaller, 1/32" tube. It's held securely with some thin CA. Here's how the wires exit into the lower reaches of the hull. You can just see the forth greem wire peeking out of the tube.
And just to prove how fortuitous was my selection of where to clamp the wires, here's an inside shot of the wires going into the conduit. I aligned the deck properly before taking this shot just to make sure it would work.
So with the lighting system in place there's absolutely no reason why I shoudn't be painting the interior and getting the two decks joined together. That work will continue tomorrow.