TMann Posted April 2, 2007 Share Posted April 2, 2007 My Long-eze plans don't seem to spec out the in-skin antennas. What is the spec for the length of copper foil I should be using? Is there a difference in foil length between the com & nav? Then there's that whole 'TORROIDS' affair. Are they needed? How many? Spacing etc. I'm real close to cutting foam on my project and will start with the winglets. I finished building my assembly table this weekend, complete with formica top so I get a good seal on my vacuum bag. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
raiki Posted April 2, 2007 Share Posted April 2, 2007 The bet seems to be get the antenna kit from RST. You'd be hard pressed to get the parts yourself for this price. It includes some documentation that will answer all your questions. http://www.rst-engr.com/rst/catalog/airplane_antenna.html Quote Adrian Smart Cozy IV #1453 Link to comment Share on other sites More sharing options...
TMann Posted April 2, 2007 Author Share Posted April 2, 2007 Hmmmm........the only problem is I bought the foil and coax already (before I could locate the rst kit.) I knew I had seen this kit on one of the canard pages ........ just could not remember where. I also looked at the Advanced Aircraft products which eliminates all the guesswork (at a price) but in reviewing the posts, it seems most everyone thinks the copper foil arrangement performs at the same level. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
dpaton Posted April 2, 2007 Share Posted April 2, 2007 Jim's (RST) antennas are just fine. Pay a couple of bucks, and life will be good. :-) Quote This is not a sig. This is a duck. Quack. Link to comment Share on other sites More sharing options...
Jon Matcho Posted April 2, 2007 Share Posted April 2, 2007 Actually, I'm going to have the same question... just because I want to use the coax and torroids I already have. A trip to the copper tape store and all I need are directions for how to install... Also, this question comes up in Chapter 7, where you install the copper antenna to the bottom of the fuselage. Quote Jon Matcho Builder & Canard Zone Admin Now: Rebuilding Quickie Tri-Q200 N479E Next: Resume building a Cozy Mark IV Link to comment Share on other sites More sharing options...
TMann Posted April 2, 2007 Author Share Posted April 2, 2007 Here is some information I received as to determining the length of the antenna foil given a frequency of 121.5 : The common formula used to determine the length of a dipole antenna in free space is: 432/frequency (in Mhz) So 432/121.5 = 3.55555 feet = 42.666666 inches. That's 21.3333 inches per side. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
TMann Posted April 3, 2007 Author Share Posted April 3, 2007 Ahhhhh.......More information: I received this this morning. It's a link to a PDF reprint which gives all the sorted details. http://www.cozybuilders.org/ref_info/RST_82704.pdf This represents a complete description of lengths, alignments, torroids, location etc. A very complete description. Thanks Marc for warehousing this. Quote T Mann - Loooong-EZ/20B Infinity R/G Chpts 18 Velocity/RG N951TM Mann's Airplane Factory We add rocket's to everything! 4, 5, 6, 7, 8. 9, 10, 14, 19, 20 Done Link to comment Share on other sites More sharing options...
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