---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 12/31/12: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:47 AM - Antenna Question (Yet Another) (dgaldrich) 2. 12:40 PM - Re: Re: Removable comm antenna (Holger Selover-Stephan) 3. 06:26 PM - Re: Re: iCom batteries, was Rejuvenating Ni-MH battery (Holger Selover-Stephan) 4. 07:13 PM - Indicator Help (Owen Baker) 5. 07:45 PM - Re: Indicator Help (Richard Girard) 6. 08:45 PM - Re: Indicator Help (Bill Bradburry) ________________________________ Message 1 _____________________________________ Time: 10:47:30 AM PST US Subject: AeroElectric-List: Antenna Question (Yet Another) From: "dgaldrich" I am building a Pietenpol (wood fuselage) and will be installing 3 antennae. 1 VHF com, 1 ELT (121.5/406), and one transponder. The turtle deck is current uncovered so I can install them anywhere I want. The issue is ground planes and the question is can I use the same ground plane for the ELT and the comm with one facing up and the other facing down with the feeds less than say 6 inches apart. at the point where I'd like to put the two vhf antennae, the fuselage is about 12 inches wide but the ground plane could be maybe 3 feet long and I could get a wider ground plane by turning it 90 degrees and extending it down the side of the fuselage. So here are the questions: 1. Can I do the back-to-back almost collocated trick with the two VHF antennae. If so, should they be mirror image (both angled back) or "concentric" (one angled back and one angled front). Would using both a ferrous ( window screen?) and non-ferrous (aluminum or copper) ground plane (sort of like a Faraday cage) provide enough isolation bearing in mind that the ELT would be used as transmit only when disaster strikes. 1a. Do I really care about the ELT antenna's capability on 121.5? If I go down, it's the 406 frequency that will get SAR to me. My thinking is that the ELT antenna's proximity to the VHF comm antenna shouldn't compromise the 406 signal. 1b. If 1a is true, then the only issue is the comm antenna radiation pattern. Locating the antennae 1/4 wavelength apart might even help, sort of like reflectors and directors in yagis. 2. How sensitive is the ground plane to width? Can I get away with 12 inches by 36? Is there a benefit in extending the ground plane down the side say 6 inches to get a 24 inch wide ground plane? Lots of questions but it's not like the supposed question on an MIT physics exam. "Given Maxwell's equations, derive the universe. Give two examples." Thanks in advance Dave Read this topic online here: http://forums.matronics.com/viewtopic.php?p=391278#391278 ________________________________ Message 2 _____________________________________ Time: 12:40:58 PM PST US From: Holger Selover-Stephan Subject: Re: AeroElectric-List: Re: Removable comm antenna Just a quick note that I took the removable comm antenna out for a few flights and got a "loud and clear". Thanks for all your advice, gents! Holger ________________________________ Message 3 _____________________________________ Time: 06:26:41 PM PST US From: Holger Selover-Stephan Subject: Re: AeroElectric-List: Re: iCom batteries, was Rejuvenating Ni-MH battery On 12/29/12 8:05 PM, Glen Matejcek wrote: > > There is an iCom battery pack available for replaceable, non-rechargeable batteries. As cheap as dry cells are compared to the rechargeables, and as little as I actually use the handheld, that is the way to go for me. Should my usage go up to the point where rechargeables make sense, I can just drop the discrete rechargeables into the same pack- > > Glen Matejcek Good tip. I use this battery pack with Eneloop rechargeable. The ICOM is my main radio. Holger ________________________________ Message 4 _____________________________________ Time: 07:13:57 PM PST US From: "Owen Baker " Subject: AeroElectric-List: Indicator Help 12/31/2012 Hello Bob Nuckolls and Fellow Listers, Here is the situation: I have a spring bias pitch trim system in my KIS TR-1 experimental amateur built airplane. I am using a Ray Allen T3-12A servo with their RP 3 LED type indicator installed in my instrument panel. The 1.2 inch travel of the T3-12A servo is just not enough movement to give me the trim travel needed at both ends, nose up and nose down. See here: http://www.rayallencompany.com/index.html My intended solution is to purchase and install an electrical linear actuator with a position indicator such as this: http://www.aeicomp.com/Detail.asp?Product_ID=302.390_6102TP&Product=P otentiometer+Feedback+2%22+Linear+Actuator+%28Speed+1%2F2%22+per+Sec%29+w %2F10K+Ohm+Pot++%22IP65+Rated%22 My questions: Indicator Question 1: Could I possibly use the already installed Ray Allen LED indicator with the 10K OHM POT that this linear actuator is equipped with? See here: http://www.aeicomp.com/image2/AE-6102TP.pdf and here: http://www.rayallencompany.com/RACmedia/instructionsRP3.pdf Indicator Question 2: If so how would I connect the three LED indicator wires (orange, green (signal return), blue) to the three wires (white-ground, yellow-V input, blue-RS input) of the actuator? Indicator Question 3: Assuming that I cannot use the Ray Allen LED indicator with this linear actuator where can I obtain an indicator that will work with this actuator? (AEI declines to help me with this question.) Speed Control Question: The linear actuator is much faster than the Ray Allen actuator and I expect that I will have to slow down the linear actuator. What is the best way to accomplish this? Many thanks for your help. OC 'O C' Baker says "The best investment you can make is the effort to gather and understand information." ________________________________ Message 5 _____________________________________ Time: 07:45:11 PM PST US Subject: Re: AeroElectric-List: Indicator Help From: Richard Girard Owen, You can save $30 by getting it here. https://www.surpluscenter.com/item.asp?item=5-1577-2&catname=electric Rick Girard On Mon, Dec 31, 2012 at 9:12 PM, Owen Baker wrote: > 12/31/2012 > > Hello Bob Nuckolls and Fellow Listers, Here is the situation: > > I have a spring bias pitch trim system in my KIS TR-1 experimental amateur > built airplane. I am using a Ray Allen T3-12A servo with their RP 3 LED > type indicator installed in my instrument panel. The 1.2 inch travel of the > T3-12A servo is just not enough movement to give me the trim travel needed > at both ends, nose up and nose down. See here: > > http://www.rayallencompany.com/index.html > > My intended solution is to purchase and install an electrical linear > actuator with a position indicator such as this: > > > http://www.aeicomp.com/Detail.asp?Product_ID=302.390_6102TP&Product=Potentiometer+Feedback+2%22+Linear+Actuator+%28Speed+1%2F2%22+per+Sec%29+w%2F10K+Ohm+Pot++%22IP65+Rated%22 > > My questions: > > Indicator Question 1: Could I possibly use the already installed Ray Allen > LED indicator with the 10K OHM POT that this linear actuator is equipped > with? See here: > > http://www.aeicomp.com/image2/AE-6102TP.pdf > > and here: > > http://www.rayallencompany.com/RACmedia/instructionsRP3.pdf > > Indicator Question 2: If so how would I connect the three LED indicator > wires (orange, green (signal return), blue) to the three wires > (white-ground, yellow-V input, blue-RS input) of the actuator? > > Indicator Question 3: Assuming that I cannot use the Ray Allen LED > indicator with this linear actuator where can I obtain an indicator that > will work with this actuator? (AEI declines to help me with this question.) > > Speed Control Question: The linear actuator is much faster than the Ray > Allen actuator and I expect that I will have to slow down the linear > actuator. What is the best way to accomplish this? > > Many thanks for your help. > > OC > > 'O C' Baker says "The best investment you can make is the effort to gather > and understand information." > > * > > * > > -- Zulu Delta Mk IIIC Thanks, Homer GBYM It isn't necessary to have relatives in Kansas City in order to be unhappy. - Groucho Marx ________________________________ Message 6 _____________________________________ Time: 08:45:27 PM PST US From: "Bill Bradburry" Subject: RE: AeroElectric-List: Indicator Help OC, That linear actuator seems like overkill. Have you tried increasing the chord of the trim tab? You can increase the length of the control horn and or increase the chord of the tab and you should be able to use the servo you have. RAC has a trim tab travel computer that shows the movement you will get with the different servos. Attached. Bill B _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Owen Baker Sent: Monday, December 31, 2012 10:12 PM Subject: AeroElectric-List: Indicator Help 12/31/2012 Hello Bob Nuckolls and Fellow Listers, Here is the situation: I have a spring bias pitch trim system in my KIS TR-1 experimental amateur built airplane. I am using a Ray Allen T3-12A servo with their RP 3 LED type indicator installed in my instrument panel. The 1.2 inch travel of the T3-12A servo is just not enough movement to give me the trim travel needed at both ends, nose up and nose down. See here: http://www.rayallencompany.com/index.html My intended solution is to purchase and install an electrical linear actuator with a position indicator such as this: http://www.aeicomp.com/Detail.asp?Product_ID=302.390_6102TP &Product=Potentiometer+Feedback+2%22+Linear+Actuator+%28Speed+1%2F2%22+per+S ec%29+w%2F10K+Ohm+Pot++%22IP65+Rated%22 My questions: Indicator Question 1: Could I possibly use the already installed Ray Allen LED indicator with the 10K OHM POT that this linear actuator is equipped with? See here: http://www.aeicomp.com/image2/AE-6102TP.pdf and here: http://www.rayallencompany.com/RACmedia/instructionsRP3.pdf Indicator Question 2: If so how would I connect the three LED indicator wires (orange, green (signal return), blue) to the three wires (white-ground, yellow-V input, blue-RS input) of the actuator? Indicator Question 3: Assuming that I cannot use the Ray Allen LED indicator with this linear actuator where can I obtain an indicator that will work with this actuator? (AEI declines to help me with this question.) Speed Control Question: The linear actuator is much faster than the Ray Allen actuator and I expect that I will have to slow down the linear actuator. What is the best way to accomplish this? Many thanks for your help. OC 'O C' Baker says "The best investment you can make is the effort to gather and understand information." ------------------------------------------------------------------------------------- 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.