---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 10/31/08: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:11 AM - Re: Re: Sub Panel Labeling (Gordon or Marge) 2. 07:36 AM - Re: Re: Sub Panel Labeling (SteinAir, Inc.) 3. 08:58 AM - Re: Re: Sub Panel Labeling (Jim Wickert) 4. 02:50 PM - Using relay for engine control . . . (Robert L. Nuckolls, III) 5. 06:40 PM - Re: Power consumption (Chris) ________________________________ Message 1 _____________________________________ Time: 05:11:47 AM PST US From: "Gordon or Marge" Subject: RE: AeroElectric-List: Re: Sub Panel Labeling -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of William Gill Sent: Thursday, October 30, 2008 10:00 PM Subject: RE: AeroElectric-List: Re: Sub Panel Labeling Henry, Attached are a few examples from my project. Bill RV-7 N151WP Bill: How are your labels created? Gordon Comfort ________________________________ Message 2 _____________________________________ Time: 07:36:25 AM PST US From: "SteinAir, Inc." Subject: RE: AeroElectric-List: Re: Sub Panel Labeling Hi Gilles, I tend to respectfully disagree here. White lettering on Gray panels is notoriously poor under almost all conditions. Unless the gray is fairly dark (almost a charcoal color), white letters get washed out and lost, and it happens in both high brightness and low brightness situations. Night time will highlight the differences even more. While you may lean towards thinking white is better at night, if it's over a light base, the letters get lost even quicker and worse than in bright light. It may be a bit counter intuititve to first thought, but white letters on light panels just doesn't work well at all for the most part. The main goal is to get the most contrast you cat between the base panel color and the lettering, regardless of what those colors may be. For example the best you can get on black is to use silver lettering (it's even better than white). On a dark maroon panel it happens to be gold foil lettering. Panels that are the most difficult are brown and some dark colors like green and red. Those are hard to get any lettering that pops really well. I think we've experimented and painted almost every color in the rainbow over the hundreds of panels we've painted/labeled. I've seen the best and worst so I'm just passing along what we've been exposed to. My 2 cents as usual. Cheers, Stein >-----Original Message----- >From: owner-aeroelectric-list-server@matronics.com >[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of GTH >Sent: Thursday, October 30, 2008 7:02 PM >To: aeroelectric-list@matronics.com >Subject: Re: AeroElectric-List: Re: Sub Panel Labeling > > > >SteinAir, Inc. a crit : >> I'd really push you >> towards black lettering for a number of reasons. >> > >I personally would tend to use white against medium gray for reasons of >low light visibility. >Not everyone has the same perception under such conditions, so I'd >conduct some tests in low light : what about visibility at dusk with no >panel lights ? What about readability under fluorescent light or >whatever is installed/employed for night lighting ? >I get the impression that white stand out better than dark figures, just >like instrument numbers, but of course others may differ. > >FWIW, >Best regards, >-- >GillesThesee >http://contrails.free.fr > > ________________________________ Message 3 _____________________________________ Time: 08:58:10 AM PST US From: Jim Wickert Subject: RE: AeroElectric-List: Re: Sub Panel Labeling Henry good looking work what did you use to make these great job! Jim Wickert Vision #159 -----Original Message----- >From: William Gill >Sent: Oct 30, 2008 8:59 PM >To: aeroelectric-list@matronics.com >Subject: RE: AeroElectric-List: Re: Sub Panel Labeling > >Henry, > >Attached are a few examples from my project. > >Bill >RV-7 N151WP > >-----Original Message----- >From: owner-aeroelectric-list-server@matronics.com >[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Henry >Trzeciakowski >Sent: Thursday, October 30, 2008 8:42 PM >To: aeroelectric-list@matronics.com >Subject: AeroElectric-List: Re: Sub Panel Labeling > >Gentlemen: > >I've seen numerous e-mails, etc regarding panel labeling, but I really >didn't see comments regarding the "COLOR" of the lettering. I've >researched >thru various FAA sites, etc., and I couldn't find articles as to what >the >"Legal" color for lettering should be (black, white). > >I have a meduim Gray Panel (see attachment) and I'm leaning towards >BLACK >Lettering...it stands out better. > >I woud appreciate any feedback or suggestions. > > >Henry >Pittsburgh, Pa. >RV-9A - wiring started ________________________________ Message 4 _____________________________________ Time: 02:50:02 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Using relay for engine control . . . >Comments/Questions: I have your book, and I read the section on relays, >but I'm still not sure a decision I made long ago is the right one. I have >an automotive engine in a pusher, and for whatever reason the engine must >be shut off by removing power from the computer. Rather than depend upon a >switch and a long run of wire, I connected the computer directly to the >battery contactor, through the normally closed contacts of a relay. This >way, the switch and wire are only used to activate the relay, which shuts >down the engine. By the way, the engine can also be shut off by pulling >breakers and shutting off fuel if necessary. Questions: What are the >consequences of using the normally closed contacts for this purpose? I ask >because they are rated lower and probably held closed with a spring. How >about a latching relay instead? Or a more appropriate relay for the task >that a layman such as myself might not know about? Thanks for the help. Is the computer the only device that needs power to keep the engine running? How about fuel pump? It's been my recommendation for years that electrically dependent engines run from the always-hot, battery-bus. This means that if you have smoke in the cockpit, you can shut off the alternator-battery-master switch and kill everything electrical without having the engine quit. Since you already have a switch and some length of wire in place to control a relay, there is little value in adding the relay unless the current needed to run the computer is too large to consider running through the switch and its associated wiring. There is a reliability factor for the switch an associated wire . . . which can only get worse by adding the relay. However, if there is a performance driver for adding the relay (you don't want to run 20A the length of the airplane twice and a 20A rated switch is a real pig), then using a smaller switch, wire and a relay to control that pathway is a rational decision. This is what battery and starter contactors are about also. Why the n.c. contacts? Modern relays are pretty robust and have excellent service lives under the hood of an automobile. If this pathway and its controls have to be 100% golden for the engine to run, then perhaps a normally open solid state relay is called for. Eric Jones has one, we'll have one too pretty soon. How much current are you talking about? What does this computer control? What other electro- whizzies need to be powered up to keep the engine runnnig? I will invite you to join us on the AeroElectric List to continue this and similar discussions. It's useful to share the information with as many folks as possible. A further benefit can be realized with membership on the list. There are lots of technically capable folks on the list who can offer suggestions too. You can join at . . . http://www.matronics.com/subscribe/ I check the List several times a day and attempt to be as responsive as time will allow. Further, there are 1800 or so subscribers that include many technically capable teachers. This is the best venue for assisting you in your studies. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 5 _____________________________________ Time: 06:40:10 PM PST US From: "Chris" Subject: Re: AeroElectric-List: Power consumption vertical power has a bit of a list, I'd do your on document research and test though. Chris Lucas RV-10 ----- Original Message ----- From: Sam Hoskins To: Aerolectric List Sent: Saturday, October 25, 2008 11:40 AM Subject: AeroElectric-List: Power consumption Is there a comprehensive list, maintained on the Connection, of the power consumption of various devices? Sam Hoskins Murphysboro, IL ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.