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Antenna for second com radio

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psiegel(at)fuse.net
Guest

Posted: Mon Aug 06, 2007 5:11 pm Post subject: Antenna for second com radio

To get ready for the 2008 AirVenture Cup Race, I am conducting a drag reduction program on my all metal Evo.  I would like to eliminate one of the two external surface com antennae from the belly.



Two options seem available, an antenna mounted in the cockpit behind the passenger seat on the aft cockpit bulkhead, or a thin wire antenna taped to the windscreen (not unlike the thin wire antennae found in windshields on automobiles.)  



Any suggestions from the list members on how to proceed?



If I use the taped wire antenna on the windscreen, should I use the same system as used on copper foil entennae on composite aircraft but substituting a thin wire for the copper foil?



Thanks in advance for any help or suggestions!



Paul Siegel N4XU

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nuckollsr(at)cox.net
Guest

Posted: Tue Aug 07, 2007 6:34 am Post subject: Antenna for second com radio

At 09:09 PM 8/6/2007 -0400, you wrote:



 	  Quote: 	
		  



To get ready for the 2008 AirVenture Cup Race, I am conducting a drag 

reduction program on my all metal Evo.  I would like to eliminate one of 

the two external surface com antennae from the belly.



Two options seem available, an antenna mounted in the cockpit behind the 

passenger seat on the aft cockpit bulkhead, or a thin wire antenna taped 

to the windscreen (not unlike the thin wire antennae found in windshields 

on automobiles.)



Any suggestions from the list members on how to proceed?



If I use the taped wire antenna on the windscreen, should I use the same 

system as used on copper foil entennae on composite aircraft but 

substituting a thin wire for the copper foil?



Thanks in advance for any help or suggestions!



Paul Siegel N4XU


	


   If this is a temporary configuration change to accommodate

   a short time event, why not simply do away with the sticky-out

   antennas all together? Use a hand-held with rubber duck during

   the event.



   I had a builder some years ago mount all his sticky-out antennas

   on removable inspection plates. While being judged for show,

   all antennas were replaced with blank plates. Seems like cheating

   to me but perhaps the judges were not interested in overall system

   utility, only appearances. In any case, the optimum solution to

   your problem is one that generates the least amount of pre-event

   labor and modifications to an otherwise perfectly good working

   airplane.



   Bob . . .

        ----------------------------------------

        ( "Physics is like sex: sure, it may   )

        ( give some practical results, but     )

        ( that's not why we do it."            )

        (                                      )

        (                 Richard P. Feynman   )

        ----------------------------------------

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BobsV35B(at)aol.com
Guest

Posted: Tue Aug 07, 2007 6:59 am Post subject: Antenna for second com radio

Good Morning Bob, Paul,

  

 Back in my glider flying days, we used one of those little fiberglass  antennas that were sometimes used instead of rubber duckies with a handheld. We  used a section of Coax between the handheld and the antenna. A hole was drilled  in the belly of the glider and the antenna stuck through the hole when it was  needed. A piece of tape was applied over the hole when it was not in use so as  to eliminate any drag produced by the hole.  We did seem to get better  results from the handheld with the antenna out the belly than when it was just  used directly.

  

 I doubt if it was a very efficient set up, but seemed to work fairly well  except for when somebody forgot to remove the antenna before landing. To handle  that eventuality, most of us carried a spare antenna.

  

 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503



  

 In a message dated 8/7/2007 9:37:10 A.M. Central Daylight Time,  nuckollsr(at)cox.net writes:

  	  Quote: 	
		  If this    is a temporary configuration change to accommodate

   a short    time event, why not simply do away with the sticky-out

      antennas all together? Use a hand-held with rubber duck during

      the event.

	


 





  [quote][b]

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