Antenna runs

A forum to discuss installation of avionics such as GPS, NAV & COMM radios, audio panels, auto pilots, etc.
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RVNewsletter
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Antenna runs

Post by RVNewsletter »

I'm one of the few people -- I think -- who has installed manual trim in his RV-7A. There are good sides and bad sides to the situation but on the latter, the lack of wiring runs is one of them.

There are two holes that take wires down the tunnel. And the manual trim cable takes up valuable real estate on one of them. I'm full up on the holes on the right side. I'm running an ELT light wire along with the trim cable, but I need to figure out how to run antenna coax to behind the baggage bulkhead where I can mount the antennaon the belly.

I'm curious what routes people in this situation have taken?
Bob Collins
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cjensen
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Post by cjensen »

I'm with you on the manual trim...I have manual everything though... :wink:

This won't be a solution for you to run coax back thru there, but I didn't mount my antenna that far back because I couldn't get coax thru there. Instead, I mounted (or will be, shall I say) mine just in front of the spar, underneath the fuel selector valve. Not trying to influence your antenna position, just letting you know what I did, that you're not alone in the manual trim world! :lol: 8)
Chad Jensen
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bullojm1
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Post by bullojm1 »

Bob,

If I were you, I'd mount the COM antenna forward of the F-704 bulkhead, underneath of the gear weldment. There's a couple of benefits to that. Less wire = less weight. Don't need to go through the F-704. I saw someone use that mount to access the antenna in flight to route a handheld to it in case their primary com radio stopped working.


Good Luck.
Mike Bullock
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Spike
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Post by Spike »

I am also going to be using manual trim in the 9. I think it has better feel than the electric trim.

I'll be mounting my antenna somewhere in front of the 9(7)06 bulkhead. I don't know yet if it will be behind or in front of main spar box, but it will be under my bum somewhere. My bet would be behind.


John
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Post by RVNewsletter »

bullojm1 wrote:Bob,

If I were you, I'd mount the COM antenna forward of the F-704 bulkhead, underneath of the gear weldment. There's a couple of benefits to that. Less wire = less weight. Don't need to go through the F-704. I saw someone use that mount to access the antenna in flight to route a handheld to it in case their primary com radio stopped working.


Good Luck.
I think Bill Repucci did it that way. My concerns up there are (a) interference with false floors I'd like to put in up there to quiet vibration and (b) possibility of any effect from being closer to the exhaust stream.
Bob Collins
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bullojm1
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Post by bullojm1 »

Bob-

Makes sense to me. I put mine directly behind the F-704.

Image

Plenty of RV'ers have put them. they are outboard enough that the exhaust isn't an issue. Plus, us taildraggers can't put them too much further back because they might be rubbin' on the ground.

I know Richard Horan ( http://www.rvproject.co.uk ) needed to punch extra holes in the web of the F-704 bulkhead for his wire runs. Here is a link to his page where he did it:

http://rvproject.co.uk/Systems/210708_Spar_drilling.htm

Good Luck!
Mike Bullock
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RV-7 | Superior IO-360 | Whirlwind 200RV
Garmin GTN650 | GRT Dual Sport SX EFIS
Status: FLYING!

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