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Cermark F16 Propjet Build Log Page 7

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Posted Thursday, March 12, 2009 

Lighting Kit Installation 

ElectroDynamics Inc. supplied the lighting kit, which was actually an afterthought on this project. I doubt I will build another plane like this, so I went for some of the gingerbread. The kit consists of an RC operated switch that can control one or more lights. Which ones becomes a function of the lamps you plug into the wiring harness. The battery was a separate purchase; a Hydrimax 4.8 volt, 1400 mah flatpack. The EDI information states the lights will run for 2+ hours with a 700 mah pack. I like having plenty of battery capacity and the additional weight was minimal.

The lamps are very nice and bright. The kit included a white landing light, a red flashing beacon and  one each, red/green position lights. The RC switch plugs into either a spare channel on the receiver, or in my case, shares the landing gear channel with the actuator servo through the use of yes, another Y connector. The landing light is ties into the RC switch here. Gear up - light off; gear down - landing light on. Makes sense. All other lights will be on whenever the receiver is on.

Again With the String and Home Brew Tools

I decided to install the flashing (strobe) beacon on the top of the fuse ahead of the vertical stab. I saw somewhere where someone installed it atop the fin, but I wasn't interested in going there on this plane, so I took the easy way out. Same goes for the nav lights. Actually, a fellow modeler and builder of one of these Cermark F16's advised me that the full,scale planes have the nav lights mounted on the left and right sides of the intake scoop. Great - that's where they would go, The landing light... well I ended up mounting that in the bottom of the intake scoop, centered.

The beacon required my string and hook deal. I threaded a string through the carefully drilled hole in the fuse and pulled a length through to the front. Then I taped the end of the lamp wire to the string and away I went. That was the only one that needed a string. That made installation very quick and easy.

F16-Lighting-Kit/threading-string-for-beacon.JPG

String and hook was the best way to snake the lamp wire through the fuse forward.

F16-Lighting-Kit/beacon-light-done.JPG
This is the beacon fully installed. It could not be installed from the inside, so it looks like this.

F16-Lighting-Kit/Beacon-with-harness.JPG
This is what the beacon looks like before installation. There is plenty of wire.

Next was the landing light and it was a bit more of a challenge. After deciding to install it in the bottom of the intake scoop, I drilled the hole to find a double firewall with about 1/2" of space between the two. So I had to fish the wire through the first hole, then through the second.

F16-Lighting-Kit/Landing-lamp.JPG
The landing lamp is very bright

F16-Lighting-Kit/left-nav-and-landing-light.JPG
This is the final installation of the landing light and the left (red) position (navigation) light

F16-Lighting-Kit/Nav-lamp.JPG
This is one of the nav lights. The flashing strobe beacon looks similar. The lens is shaped such that the majority of the light radiates from the side and not straight out front like many conventional LED's.

F16-Lighting-Kit/Landing-light-wiring-deatil.JPG
Detail of the landing light wiring. It's tight in there. The plane wasn't built for lights.

F16-Lighting-Kit/EDR-RC-switch.JPG
This is the "brain" of the EDI lighting kit. All lights plug into the wiring harnesses. Once circuit can be operated by the radio and the other illuminates the lights whenever the receiver is on. When the RC switch senses the rx is on, the lights on the non-RC controlled circuit are energized. Programming it to come on based on desired transmitter switch position is accomplished easily with the "set" switch and the supplied instructions. Very easy.
F16-Lighting-Kit/All-lighting-wiring-at-front.JPG
All 4 lighting wires have been pulled through to the terminating point in the front of the fuse. It is here that they will be plugged into the RC switch and the battery. The battery will likely go all the way up front. I have read that people are putting lead up front on this ship. I hope I don't have to do that.

_______________________________________________________________________ 

Where Things Stand Today

I am getting closer to having this airplane done. Granted, I've added a lot of time to the project. Let's not forget the landing gear mounts that now have the strength of steel, but the EDI lighting kit as well and all that goes along with designing on the fly.

As near as I can tell from sitting here at the computer, the following still needs to be done:

  • Engine and fuel system
  • Finish lighting work
  • Missle rails
  • Ventral fins
  • Complete post assembly mechanical and operational checks
  • Weight and balance
  • Pilot install

Stay tuned...

Rick Tressler - Columbus, Ohio

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