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05-22-2016, 11:09 PM
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Join Date: Dec 2008
Location: Newbury Park, CA
Posts: 282
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Broken ELT Antenna
My ELT antenna broke near the base. Standard antenna that comes with the ACK E-04 transponder. Anyone experience this? Any ideas how this might happen?
Over tightening?
Craig
__________________
Craig Bennett
321GT Flying RV6
2018 dues paid, how about you?
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05-23-2016, 07:30 AM
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Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,183
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Not likely from over-tightening. Where was it installed?
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Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)
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05-23-2016, 09:51 AM
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Join Date: Dec 2008
Location: Newbury Park, CA
Posts: 282
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ELT Anrenna
Quote:
Originally Posted by Raymo
Not likely from over-tightening. Where was it installed?
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Belly of the airplane, just after of the baggage wall.
Craig
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Craig Bennett
321GT Flying RV6
2018 dues paid, how about you?
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05-23-2016, 10:02 AM
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Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 2,183
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My vote would be stress from airflow and vibration. Most people install their ELT antenna inside the canopy or airframe with a view of the sky.
__________________
Ray
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ AFP FM-150 FI, Dual PMags, Vetterman Trombone Exh, SkyTech starter, BandC Alt (PP failed after 226 hrs)
Catto 3 blade NLE, FlightLines Interior, James cowl, plenum & intake, Anti-Splat -14 seat mod and nose gear support
All lines by TSFlightLines (aka Hoser)
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05-23-2016, 10:23 AM
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Join Date: Dec 2008
Location: Newbury Park, CA
Posts: 282
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Broken antenna
Quote:
Originally Posted by Raymo
My vote would be stress from airflow and vibration. Most people install their ELT antenna inside the canopy or airframe with a view of the sky.
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ACK's instructions state that on a metallic airframe the antenna must be mounted on the outside and on the top of the airframe.
They also state that the antenna can withstand airspeeds of 260 kts. My wings are still on so I'm pretty sure I've kept it under 260. :-)
Craig
__________________
Craig Bennett
321GT Flying RV6
2018 dues paid, how about you?
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05-23-2016, 12:12 PM
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Join Date: Aug 2010
Location: Wichita, KS
Posts: 1,957
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Quote:
Originally Posted by cbennet1
ACK's instructions state that on a metallic airframe the antenna must be mounted on the outside and on the top of the airframe.
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You mentioned in an earlier post that this particular antenna was mounted on the bottom of the airframe, rather than on top as the manufacturer instructs. Perhaps some interaction between with gear flow, exhaust pulses, or simply a piece of gravel blown up by your propeller contributed to an early demise for your antenna.
__________________
Kurt W.
RV9A
FLYING!!!
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