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Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Sun Mar 08, 2009 11:43 am Post subject: Wingtip Nav question

In the Bob archer antenna install guide, it says that:



"If two VOR receivers are being installed one antenna

should be installed in each wing tip and each antenna

connected to a receiver.  This type of installation

would produce twice as much signal into each receiver

and this much signal increase would mean an increase

of about 25% increase in VOR range."



Can someone explain how this could be so?  Currently

I have one in a wingtip and one on the tail, but due

to some new antenna needs I may be moving my tail

antenna.  I don't understand how having one in each

wingtip would affect performance, considering they're

being connected to separate receivers, and each receiver

may be tuned to whole separate VOR's.



I just don't get how it could be.

-- 

Tim Olson - RV-10 N104CD

retasker(at)optonline.net
Guest

Posted: Sun Mar 08, 2009 12:13 pm Post subject: Wingtip Nav question

What it is saying is to use two antennas (one per receiver), rather than 

one antenna with a splitter.



Dick Tasker



Tim Olson wrote:

 	  Quote: 	
		   



 In the Bob archer antenna install guide, it says that:



 "If two VOR receivers are being installed one antenna

 should be installed in each wing tip and each antenna

 connected to a receiver.  This type of installation

 would produce twice as much signal into each receiver

 and this much signal increase would mean an increase

 of about 25% increase in VOR range."



 Can someone explain how this could be so?  Currently

 I have one in a wingtip and one on the tail, but due

 to some new antenna needs I may be moving my tail

 antenna.  I don't understand how having one in each

 wingtip would affect performance, considering they're

 being connected to separate receivers, and each receiver

 may be tuned to whole separate VOR's.



 I just don't get how it could be.


	


-- 

Please Note: 

No trees were destroyed in the sending of this message.  We do concede, however,

that a significant number of electrons may have been temporarily inconvenienced.

--

etienne.phillips(at)gmail
Guest

Posted: Sun Mar 08, 2009 12:42 pm Post subject: Wingtip Nav question

2 antennae on one receiver and transmitter is not as easy as it seems.



You need to match the distance between the antennae to the frequency,  

and direction you expect to be receiving from...



The length of cable inbetween the antennae is also important. Not for  

the faint of heart... Best case is a signal strength that is about  

80% as good as 1 antenna from all directions. Worst case is that it's  

twice as potent in one direction, and completely dead 90 degrees out.



Unless you're trying to make a directional antennae array in which  

case the best and worst cases swap around!



For navigation, I like non-directional antennae 



With this in mind, I have no idea what the install guide is referring  

to. It may be that placing two non-connected VOR antennae right next  

to each other causes them to interfere with one another, and by  

mounting them as far apart as possible (on either wingtip) the  

detrimental effects are halved.

On 08 Mar 2009, at 10:10 PM, Richard E. Tasker wrote:



 	  Quote: 	
		   

 <retasker(at)optonline.net>



 What it is saying is to use two antennas (one per receiver), rather  

 than one antenna with a splitter.



 Dick Tasker

nuckolls.bob(at)aeroelect
Guest

Posted: Sun Mar 08, 2009 3:03 pm Post subject: Wingtip Nav question

At 02:43 PM 3/8/2009, you wrote:

 	  Quote: 	
		  



In the Bob archer antenna install guide, it says that:



"If two VOR receivers are being installed one antenna

should be installed in each wing tip and each antenna

connected to a receiver.  This type of installation

would produce twice as much signal into each receiver

and this much signal increase would mean an increase

of about 25% increase in VOR range."


	


   I think he's trading off the options for numbers

   of antennas installed versus the number of radios.

   One antenna and a splitter drops energy to both

   radios by 50% which translates into approximately

   30% drop in range for BOTH receivers.



   Each receiver having its own antenna recovers that

   drop in range.



   Having said that, know that under controlled flight

   using the airways, VORs used and prescribed

   changeover points along those airways insures a

   healthy signal to the radios . . . irrespective of

   relatively small losses in range alluded to by Bob's

   statement.

 	  Quote: 	
		  Can someone explain how this could be so?  Currently

I have one in a wingtip and one on the tail, but due

to some new antenna needs I may be moving my tail

antenna.  I don't understand how having one in each

wingtip would affect performance, considering they're

being connected to separate receivers, and each receiver

may be tuned to whole separate VOR's.



I just don't get how it could be.


	


   Everything we do in life is ultimately grounded in the

   economics of energy management. Assuming all other

   things equal, two antennas will deliver 2x the energy

   to each radio versus one antenna and a splitter.

   In real life, antenna patterns around the aircraft

   will have more profound effects on range than numbers

   of antennas versus radios. Wing-tip mounted antennas

   cannot even come close to the overall performance of

   a clear-field antenna either for gain or patterns.

   In practice, they work just fine for the increasingly

   rare instances that VOR navigation is truly useful.



   Haven't turn a VOR receiver ON since I wrote this article

   for Sport Aviation Article almost 12 years ago:



http://www.aeroelectric.com/articles/nailgun.pdf





        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

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

retasker(at)optonline.net
Guest

Posted: Sun Mar 08, 2009 4:55 pm Post subject: Wingtip Nav question

They are VOR antennas for NAV radios.  Last I knew the only VOR/NAV 

transmissions come from the ground...

Dick Tasker

Etienne Phillips wrote:

 	  Quote: 	

 <etienne.phillips(at)gmail.com>

 2 antennae on one receiver and transmitter is not as easy as it seems.

 You need to match the distance between the antennae to the frequency, 

 and direction you expect to be receiving from...

 The length of cable inbetween the antennae is also important. Not for 

 the faint of heart... Best case is a signal strength that is about 80% 

 as good as 1 antenna from all directions. Worst case is that it's 

 twice as potent in one direction, and completely dead 90 degrees out.

 Unless you're trying to make a directional antennae array in which 

 case the best and worst cases swap around!

 For navigation, I like non-directional antennae 

 With this in mind, I have no idea what the install guide is referring 

 to. It may be that placing two non-connected VOR antennae right next 

 to each other causes them to interfere with one another, and by 

 mounting them as far apart as possible (on either wingtip) the 

 detrimental effects are halved.

 On 08 Mar 2009, at 10:10 PM, Richard E. Tasker wrote:

> 

> <retasker(at)optonline.net>

>

> What it is saying is to use two antennas (one per receiver), rather 

> than one antenna with a splitter.

>

> Dick Tasker

>

-- 

Please Note: 

No trees were destroyed in the sending of this message.  We do concede, however,

that a significant number of electrons may have been temporarily inconvenienced.

--

etienne.phillips(at)gmail
Guest

Posted: Sun Mar 08, 2009 9:08 pm Post subject: Wingtip Nav question

You are correct - but when dealing with aerials and radiation  

patterns, it doesn't matter if you're talking about transmitting or  

receiving...



As a side-note, if you have a DME instrument then you do transmit,  

but it's a completely different frequency range (and therefore I'm  

guessing has it's own antenna).



I agree with Bob Nuckolls though, having a single antenna, mounted in  

a clear spot, is by far the best way of improving signal quality!



Good luck with your installation...



On 09 Mar 2009, at 2:54 AM, Richard E. Tasker wrote:



 	  Quote: 	
		   

 <retasker(at)optonline.net>



 They are VOR antennas for NAV radios.  Last I knew the only VOR/NAV  

 transmissions come from the ground...



 Dick Tasker

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Mon Mar 09, 2009 10:13 am Post subject: Wingtip Nav question

Well thanks guys for clearing up the wording in the install

guide.  It makes perfect and obvious sense that using 2

antennas for 2 NAV's would be way better than 1 antenna

for each.

Now for a follow-up that's a bit tougher maybe...

I need to mount an ADS-B shark fin antenna...978mhz,

putting out 50W (similar to a transponder but those

crank out more like 150W).

If I have the choice of:

A) Move a perfectly working NAV Antenna in an ideal location

to a wingtip where I know the performance won't be as good,

and putting the ADS-B in place of it.

or

B) Mounting the ADS-B antenna about 2' from the NAV antenna

and leaving everything as-is.

or

C) Moving the Marker Beacon antenna to within a few inches

of the NAV antenna, and then putting the ADS-B antenna right

where the MB currently is.

Which one seems most reasonable?  I know you generally want

to keep those powerful transmitters away from other stuff,

with being on totally separate freq's, how bad is it to

have a 978mhz transmitter 2' from the NAV.  Will the SL-30's

circuitry filter well enough to not be a problem do you think?

Tell you what, if you're building a kit, take the time to

come up with locations for all the possible antenna types

you could ever have, because squeezing one in can be a chore

if you want to still live by the book.

Tim Olson - RV-10 N104CD - Flying

Etienne Phillips wrote:

 	  Quote: 	

 <etienne.phillips(at)gmail.com>

 You are correct - but when dealing with aerials and radiation patterns, 

 it doesn't matter if you're talking about transmitting or receiving...

 As a side-note, if you have a DME instrument then you do transmit, but 

 it's a completely different frequency range (and therefore I'm guessing 

 has it's own antenna).

 I agree with Bob Nuckolls though, having a single antenna, mounted in a 

 clear spot, is by far the best way of improving signal quality!

 Good luck with your installation...

 On 09 Mar 2009, at 2:54 AM, Richard E. Tasker wrote:

> 

> <retasker(at)optonline.net>

>

> They are VOR antennas for NAV radios.  Last I knew the only VOR/NAV 

> transmissions come from the ground...

>

> Dick Tasker

>

AV8ORJWC

Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"

Posted: Mon Mar 09, 2009 10:55 am Post subject: Wingtip Nav question

Tim, your closing paragraph is invaluable.  Most builders start with a

really rough Build budget, then throw caution to the wind after all the

"Golly Gee" stuff comes online. The antennas always seem to get the last

portion at the decision table. 



A really progressive builder lists the avionics and their best possible

antenna needs, then conceptually generalizes antenna placement along the

ground plane or concealed under the surface.  Once the antenna and its

location are known, building an AC43.13 compliant doubler makes the

plans built process even easier.  The answer to this question will be

Well Watched.



I have always used you as the example of great cockpit inventory and

diverse functionality sprinkled with Midwestern practicality.



John C.



--

BobsV35B(at)aol.com
Guest

Posted: Mon Mar 09, 2009 12:00 pm Post subject: Wingtip Nav question

Good Afternoon Tim,

 I would probably change the location of many of your antennas, but we all  have different ideas as to where things should stick out from our aircraft.  

 However! Of the choices given, dump the marker beacon!!

 I know of no situation where a marker beacon is of any use at all as long  as you have an IFR approved GPS.

 Happy  Skies

Old Bob

AKA

Bob Siegfried

Ancient Aviator

628 West 86th  Street

Downers Grove, IL 60516

630 985-8502 

Stearman  N3977A

Brookeridge Air Park LL22   

  In a message dated 3/9/2009 1:16:07 P.M. Central Daylight Time,  Tim(at)MyRV10.com writes:

  	  Quote: 	
		  -->    AeroElectric-List message posted by: Tim Olson    <Tim(at)myrv10.com>

Well thanks guys for clearing up the wording in    the install

guide.  It makes perfect and obvious sense that using    2

antennas for 2 NAV's would be way better than 1 antenna

for    each.

Now for a follow-up that's a bit tougher maybe...

I need    to mount an ADS-B shark fin antenna...978mhz,

putting out 50W (similar to a    transponder but those

crank out more like 150W).

If I have the    choice of:

A) Move a perfectly working NAV Antenna in an ideal    location

to a wingtip where I know the performance won't be as good,

and    putting the ADS-B in place of it.

or

B) Mounting the ADS-B    antenna about 2' from the NAV antenna

and leaving everything    as-is.

or

C) Moving the Marker Beacon antenna to within a few    inches

of the NAV antenna, and then putting the ADS-B antenna    right

where the MB currently is.

Which one seems most    reasonable?  I know you generally want

to keep those powerful    transmitters away from other stuff,

with being on totally separate freq's,    how bad is it to

have a 978mhz transmitter 2' from the NAV.  Will the    SL-30's

circuitry filter well enough to not be a problem do you    think?

Tell you what, if you're building a kit, take the time    to

come up with locations for all the possible antenna types

you could    ever have, because squeezing one in can be a chore

if you want to still    live by the book.

Tim Olson - RV-10 N104CD -    Flying

Etienne Phillips wrote:

 	  Quote: 	
		   --> AeroElectric-List    message posted by: Etienne Phillips 

    <etienne.phillips(at)gmail.com>

 You are correct - but when    dealing with aerials and radiation patterns, 

 it doesn't matter if    you're talking about transmitting or receiving...

 As a    side-note, if you have a DME instrument then you do transmit, but 

    it's a completely different frequency range (and therefore I'm guessing    

 has it's own antenna).

 I agree with Bob Nuckolls    though, having a single antenna, mounted in a 

 clear spot, is by far    the best way of improving signal quality!

 Good luck with your    installation...

 On 09 Mar 2009, at 2:54 AM, Richard E. Tasker    wrote:

> --> AeroElectric-List message posted by:    "Richard E. Tasker" 

>    <retasker(at)optonline.net>

>

> They are VOR antennas    for NAV radios.  Last I knew the only VOR/NAV 

> transmissions    come from the ground...

>

> Dick  = Use  lities  y                 - MATRONICS WEB FORUMS  =========================<             - List Contribution Web Site  ;                             =========================

 A Good Credit Score is 700 or Above.  See yours in just 2 easy steps!

n8zg(at)mchsi.com
Guest

Posted: Mon Mar 09, 2009 6:10 pm Post subject: Wingtip Nav question

Tim - 



Option C.

Marker beacon and nav are both receive-only.  They should be perfectly happy

side-by-side.



neal 



--

LarryRosen

Joined: 16 Jan 2006
Posts: 415
Location: Medford, NJ

Posted: Tue Mar 10, 2009 6:20 am Post subject: Wingtip Nav question

Tim,

Why don't you put the marker beacon antenna in the wing tip, just use a 

40" piece of wire, and then mount the ADS-B antenna in the current 

marker beacon location.



Larry Rosen



Tim Olson wrote:

 	  Quote: 	
		   



 Well thanks guys for clearing up the wording in the install

 guide.  It makes perfect and obvious sense that using 2

 antennas for 2 NAV's would be way better than 1 antenna

 for each.



 Now for a follow-up that's a bit tougher maybe...



 I need to mount an ADS-B shark fin antenna...978mhz,

 putting out 50W (similar to a transponder but those

 crank out more like 150W).



 If I have the choice of:



 A) Move a perfectly working NAV Antenna in an ideal location

 to a wingtip where I know the performance won't be as good,

 and putting the ADS-B in place of it.



 or

 B) Mounting the ADS-B antenna about 2' from the NAV antenna

 and leaving everything as-is.



 or



 C) Moving the Marker Beacon antenna to within a few inches

 of the NAV antenna, and then putting the ADS-B antenna right

 where the MB currently is.

 Which one seems most reasonable?  I know you generally want

 to keep those powerful transmitters away from other stuff,

 with being on totally separate freq's, how bad is it to

 have a 978mhz transmitter 2' from the NAV.  Will the SL-30's

 circuitry filter well enough to not be a problem do you think?



 Tell you what, if you're building a kit, take the time to

 come up with locations for all the possible antenna types

 you could ever have, because squeezing one in can be a chore

 if you want to still live by the book.

 Tim Olson - RV-10 N104CD - Flying



 Etienne Phillips wrote:

> 

> <etienne.phillips(at)gmail.com>

>

> You are correct - but when dealing with aerials and radiation 

> patterns, it doesn't matter if you're talking about transmitting or 

> receiving...

>

> As a side-note, if you have a DME instrument then you do transmit, 

> but it's a completely different frequency range (and therefore I'm 

> guessing has it's own antenna).

>

> I agree with Bob Nuckolls though, having a single antenna, mounted in 

> a clear spot, is by far the best way of improving signal quality!

>

> Good luck with your installation...

>

> On 09 Mar 2009, at 2:54 AM, Richard E. Tasker wrote:

>

>> 

>> <retasker(at)optonline.net>

>>

>> They are VOR antennas for NAV radios.  Last I knew the only VOR/NAV 

>> transmissions come from the ground...

>>

>> Dick Tasker

>>

_________________
Larry Rosen
#40356
N205EN (reserved)
<http>

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Tue Mar 10, 2009 8:06 am Post subject: Wingtip Nav question

I may end up doing that, but the current wire wouldn't reach and

I'd have to extend it in the conduit to the wingtip.

The other variable that I didn't mention is that the current location

for my MB antenna...the one that I'd move to put in the ADS-B UAT

antenna, is also right next to my APRS antenna.   So I COULD

end up moving 2 of them.  I'm not sure I'll worry about the APRS

and the UAT interfering much though, as the APRS only transmits

intermittently.  It would be easier to move if needed, too.

The current Marker Beacon location is really a great one ofr

the UAT antenna.



Tim Olson - RV-10 N104CD - Flying

do not archive

Larry Rosen wrote:

 	  Quote: 	
		   

 

 Tim,

 Why don't you put the marker beacon antenna in the wing tip, just use a 

 40" piece of wire, and then mount the ADS-B antenna in the current 

 marker beacon location.

 

 Larry Rosen

 

 Tim Olson wrote:

> 

>

> Well thanks guys for clearing up the wording in the install

> guide.  It makes perfect and obvious sense that using 2

> antennas for 2 NAV's would be way better than 1 antenna

> for each.

>

> Now for a follow-up that's a bit tougher maybe...

>

> I need to mount an ADS-B shark fin antenna...978mhz,

> putting out 50W (similar to a transponder but those

> crank out more like 150W).

>

> If I have the choice of:

>

> A) Move a perfectly working NAV Antenna in an ideal location

> to a wingtip where I know the performance won't be as good,

> and putting the ADS-B in place of it.

>

> or

> B) Mounting the ADS-B antenna about 2' from the NAV antenna

> and leaving everything as-is.

>

> or

>

> C) Moving the Marker Beacon antenna to within a few inches

> of the NAV antenna, and then putting the ADS-B antenna right

> where the MB currently is.

> Which one seems most reasonable?  I know you generally want

> to keep those powerful transmitters away from other stuff,

> with being on totally separate freq's, how bad is it to

> have a 978mhz transmitter 2' from the NAV.  Will the SL-30's

> circuitry filter well enough to not be a problem do you think?

>

> Tell you what, if you're building a kit, take the time to

> come up with locations for all the possible antenna types

> you could ever have, because squeezing one in can be a chore

> if you want to still live by the book.

> Tim Olson - RV-10 N104CD - Flying

>

> Etienne Phillips wrote:

>> 

>> <etienne.phillips(at)gmail.com>

>>

>> You are correct - but when dealing with aerials and radiation 

>> patterns, it doesn't matter if you're talking about transmitting or 

>> receiving...

>>

>> As a side-note, if you have a DME instrument then you do transmit, 

>> but it's a completely different frequency range (and therefore I'm 

>> guessing has it's own antenna).

>>

>> I agree with Bob Nuckolls though, having a single antenna, mounted in 

>> a clear spot, is by far the best way of improving signal quality!

>>

>> Good luck with your installation...

>>

>> On 09 Mar 2009, at 2:54 AM, Richard E. Tasker wrote:

>>

>>> 

>>> <retasker(at)optonline.net>

>>>

>>> They are VOR antennas for NAV radios.  Last I knew the only VOR/NAV 

>>> transmissions come from the ground...

>>>

>>> Dick Tasker

>>>

>

BobsV35B(at)aol.com
Guest

Posted: Tue Mar 10, 2009 8:25 am Post subject: Wingtip Nav question

Good Morning Larry,

  

 I mentioned this yesterday, but if I may repeat, why would anyone want a  marker beacon receiver?

  

 The only approach I can think of that uses a marker beacon to supply a  lower MDA is the LOC-D at KSEE, Gillespie Field, San Diego.  The fan marker  there is called GRIGG and it has been out of service awaiting repair parts for  several years. Those who have an IFR legal GPS can use it to locate the GRIGG  intersection in lieu of the failed fan marker.

  

  Even the KSEE LOC-D approach could be executed without the marker or a  means of determining it's position, but it would be to a higher MDA

  



 If you have any GPS, even a VFR one, it can supply  situational awareness much better than a marker.  An IFR approved GPS  with a current database, can be legally used in lieu of any still functioning  marker beacon.

  

 The FAA removed the marker beacon as a required portion of the ILS several  years ago. They are slowly being phased out.

  

 Happy  Skies



Old Bob

AKA

Bob Siegfried

Ancient Aviator

628 West 86th  Street

Downers Grove, IL 60516

630 985-8502 

Stearman  N3977A

Brookeridge Air Park LL22   

  In a message dated 3/10/2009 9:22:21 A.M. Central Daylight Time,  N205EN(at)gmail.com writes:

  	  Quote: 	
		  Tim,

Why don't you put the marker beacon antenna in the wing tip,    just use a 

40" piece of wire, and then mount the ADS-B antenna in the    current 

marker beacon location.



Larry  Rosen

	




 A G00126575x1219671244x1201345076/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DfebemailfooterNO62"> See yours in just 2 easy steps!

  [quote][b]

Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Tue Mar 10, 2009 9:15 am Post subject: Wingtip Nav question

I hear ya Bob...didn't mean to ignore it. You make a good point.

The thing I can't answer is....if I have a MB receiver and

I don't put an antenna of some sort on it, could that cause

any potential problems.  Probably not, but, I figure I've

already got the antenna, and the wire run, and so I may

as well terminate it somewhere.  Also, even though you don't

need it to get lower minimums, it still IS an audible source

of knowing when you pass certain points, so although it has

little value, it isn't really worthless.  If I were starting

over I'd probably still wire it in to a wingtip or something,

just to terminate it since I have the receiver.  But, it

certainly is one of the things I'd miss the least in the panel.

Probably even less than an ADF. 



Tim Olson - RV-10 N104CD - Flying

do not archive

BobsV35B(at)aol.com wrote:

 	  Quote: 	
		   Good Morning Larry,

  

 I mentioned this yesterday, but if I may repeat, why would anyone want a 

 marker beacon receiver?

  

 The only approach I can think of that uses a marker beacon to supply a 

 lower MDA is the LOC-D at KSEE, Gillespie Field, San Diego.  The fan 

 marker there is called GRIGG and it has been out of service awaiting 

 repair parts for several years. Those who have an IFR legal GPS can use 

 it to locate the GRIGG intersection in lieu of the failed fan marker.

  

 Even the KSEE LOC-D approach could be executed without the marker or a 

 means of determining it's position, but it would be to a higher MDA

  

 If you have any GPS, even a VFR one, it can supply situational awareness 

 much better than a marker.  An IFR approved GPS with a current database, 

 can be legally used in lieu of any still functioning marker beacon.

  

 The FAA removed the marker beacon as a required portion of the ILS 

 several years ago. They are slowly being phased out.

  

 Happy Skies

 

 Old Bob

 AKA

 Bob Siegfried

 Ancient Aviator

 628 West 86th Street

 Downers Grove, IL 60516

 630 985-8502

 Stearman N3977A

 Brookeridge Air Park LL22

  

 In a message dated 3/10/2009 9:22:21 A.M. Central Daylight Time, 

 N205EN(at)gmail.com writes:

 

     Tim,

     Why don't you put the marker beacon antenna in the wing tip, just use a

     40" piece of wire, and then mount the ADS-B antenna in the current

     marker beacon location.

 

     Larry Rosen

 

 

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

 *A 

 G00126575x1219671244x1201345076/aol?redir=http:%2F%2Fwww.freecreditreport.com%2Fpm%2Fdefault.aspx%3Fsc%3D668072%26hmpgID%3D62%26bcd%3DfebemailfooterNO62"> 

 See yours in just 2 easy steps!*

 

 *

 

 

 *

msausen

Joined: 25 Oct 2007
Posts: 559
Location: Appleton, WI USA

Posted: Wed Mar 11, 2009 4:27 am Post subject: Wingtip Nav question

At the very least you will probably want to mark your PS Engineering MB lights as INOP if you disconnect your MB antenna.  This is the main reason I would leave something.  Another thing I have heard others do (mine is that 40" wire in the tip) is to put a 40" wire in the bottom of the cowl.



Michael



--

Allen Fulmer

Joined: 10 Jan 2006
Posts: 79
Location: Alexander City, AL

Posted: Wed Mar 11, 2009 10:30 am Post subject: Wingtip Nav question

Or on the wing to fuselage lower fairing.



[quote]>>--

_________________
RV7 QB Fuselage
Eggenfellner H6 on orde
N808AF reserved
Alexander City, AL

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