VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-14
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 04-15-2018, 02:46 PM
iamtheari iamtheari is offline
 
Join Date: Nov 2017
Location: ND
Posts: 136
Default

I now feel dumb for having already drilled the holes for the UAT antenna in the tail skin. I thought it was intended for the transmitter side of that whole affair. The supplied cord is 15 feet long, give or take a few inches. I will have to debate covering it up or finding a VOR antenna that will work in that location.
Reply With Quote
  #12  
Old 04-15-2018, 02:50 PM
mturnerb mturnerb is offline
 
Join Date: Apr 2015
Location: Ponte Vedra, FL
Posts: 722
Default

Quote:
Originally Posted by iamtheari View Post
I now feel dumb for having already drilled the holes for the UAT antenna in the tail skin. I thought it was intended for the transmitter side of that whole affair. The supplied cord is 15 feet long, give or take a few inches. I will have to debate covering it up or finding a VOR antenna that will work in that location.
I've researched this and many recommend "cat whisker" style antenna in this location. I like that option better than on the V-stab. Archer in wingtip is an option as well.
__________________
Turner Billingsley
RV-14A In Progress
N14VB Reserved
https://turnerb14a.blogspot.com/
Reply With Quote
  #13  
Old 04-15-2018, 04:09 PM
iamtheari iamtheari is offline
 
Join Date: Nov 2017
Location: ND
Posts: 136
Default

Quote:
Originally Posted by mturnerb View Post
I've researched this and many recommend "cat whisker" style antenna in this location. I like that option better than on the V-stab. Archer in wingtip is an option as well.
The wingtip option seems like less drag, and any difference in reception is justifiable since I won’t use the nav radio much (but do want it so I can always fly an approach or navigate in case of GPS outage).

But the useless holes in the fuselage will bug me.
Reply With Quote
  #14  
Old 04-15-2018, 08:33 PM
iamtheari iamtheari is offline
 
Join Date: Nov 2017
Location: ND
Posts: 136
Default

Quote:
Originally Posted by snopercod View Post
That's going to give you a pretty long coax length. IIRC, the installation instructions on my GTX-327 read "11' max".
The GTX 45R manual doesn’t seem to specify a maximum cable length, so I should be okay to use the rear location.
Reply With Quote
  #15  
Old 04-16-2018, 02:47 PM
Erimo's Avatar
Erimo Erimo is offline
 
Join Date: Jul 2015
Location: Marcoussis, France
Posts: 67
Default

Quote:
Originally Posted by iamtheari View Post
My RV-14 fuselage kit will be here in the next couple of weeks, and my tail cone is taking shape. I figure that now is an appropriate time to think about adding doublers for antennas. The kit already seems to accommodate two comm antennas on the belly, a transponder/ADS-B antenna on the bottom of the tail, and the ELT antenna inside the baggage area.

I am planning to have a GTN 650, a GMA 245R, and a G3X Touch with SiriusXM. My understanding is that I will need the following antennas in addition to those that the kit provides for, as listed above:

1. VOR/LOC/GS
2. GPS for GTN 650 (GA 35)
3. GPS/XM for G3X Touch (GA 57X)

I'm not the first one doing this, by any stretch of the imagination. So, please show me where you mounted these antennas on your RV. Thanks!
My avionics : G3X Touch (x2) / GTN650 / GTX35R / GTR 20R / G5 ...
The antennas : GTN650: GA35 / GTR Com2 + GTN Com1 : 2 Comant Ci 122 (belly) / VOR : Bob Archer (wing tip) / 2 GA 26C for GDU and G5 (under upper cowl).
__________________
Eric
RV 14A - #140252 - flies
France
2018 dues paid
Reply With Quote
  #16  
Old 04-16-2018, 03:21 PM
Walt's Avatar
Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 4,804
Default

Quote:
Originally Posted by iamtheari View Post
The GTX 45R manual doesn’t seem to specify a maximum cable length, so I should be okay to use the rear location.
Not a great idea unless your xpdr is in the back, you still have to pass a xpdr cert which requires 125w minimum output at the antenna. Typically 1.5db cable loss is the spec for xpdrs which is about 6' for RG400. Make it longer at your own risk.
__________________
Walt Aronow, Dallas, TX (52F) RV7A, IO360, C/S, 1500+hrs

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
Reply With Quote
  #17  
Old 04-19-2018, 10:46 AM
iamtheari iamtheari is offline
 
Join Date: Nov 2017
Location: ND
Posts: 136
Default

I guess to be safe it makes the most sense to put the transponder antenna in the location under the baggage compartment, as appears to be shown in part F-01484 on page 29-02.

I am also leaning toward the Archer VOR antenna in the wingtip, for minimum drag. There aren't any good VOR antennas that would cover up my drilled part anyhow.

So now the question is what to do about the holes I drilled in F-01479 and the coax cable that I pulled back to that location. Any ideas from the much wiser, more experienced builders out there?
Reply With Quote
  #18  
Old 04-19-2018, 08:05 PM
mountainride mountainride is offline
 
Join Date: Jan 2018
Location: Golden, Colorado
Posts: 22
Default huge bummer

I did the same thing and drilled the hole + ran the UAT cable that came with the tailcone. Big mistake to cut a huge hole that I now have to figure out what to do with. The UAT cable and hole should be removed from the plans now that the 45Ris becoming more common. Interested to hear solutions, I too am tempted to run the antenna to that location anyways. Hopefully the forward hole isn't drilled out in the QB fuse.
__________________
RV-14 Builder
https://rv14mountainride.wordpress.com/
Reply With Quote
  #19  
Old 04-19-2018, 10:32 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 2,434
Default

Quote:
Originally Posted by iamtheari View Post
The GTX 45R manual doesn’t seem to specify a maximum cable length, so I should be okay to use the rear location.
I asked my avionics shop about this limitation and he did not agree. He said they have put many transponder in planes such as kingair with longer run and has had no issues.

I have also drilled the spot in the tail cone only to find out that I may not have needed it. So I guess a bit more research is needed to see if I should put it in the baggage area or in the tail.
__________________
Mehrdad
RV7A - IO360M1B - SOLD
Dues paid
Reply With Quote
  #20  
Old 04-20-2018, 04:54 AM
mturnerb mturnerb is offline
 
Join Date: Apr 2015
Location: Ponte Vedra, FL
Posts: 722
Default

Quote:
Originally Posted by mountainride View Post
I did the same thing and drilled the hole + ran the UAT cable that came with the tailcone. Big mistake to cut a huge hole that I now have to figure out what to do with. The UAT cable and hole should be removed from the plans now that the 45Ris becoming more common. Interested to hear solutions, I too am tempted to run the antenna to that location anyways. Hopefully the forward hole isn't drilled out in the QB fuse.
My -14A fuse kit came with small covers designed to go over the openings where steps are installed for those who are building the tail dragger option - those openings are much larger than the opening in the tailcone you're talking about.. It shouldn't be too hard to fabricate a cover of some sort to rivet over the opening (or use screws for possible future use of this hole for antenna, camera, whatever). It's in a very inconspicuous location fortunately.
__________________
Turner Billingsley
RV-14A In Progress
N14VB Reserved
https://turnerb14a.blogspot.com/
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:44 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.