gmcjetpilot
Joined: 04 Nov 2006
Posts: 170
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 Posted: Wed Dec 20, 2006 4:58 am Post subject: wingtip VOR antenna (don't ?) |
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Jim:
If you are using the VOR for secondary navigation/VFR than
it will be fine. If you plan on IFR flight and using the VOR to fly
airways and approaches (VOR/LOC/ILS) than consider bagging
the wing tip NAV antenna. The wing tip NAV antenna works but
that is a relevant term. The inside wing tip antenna is not
going to work as well as an external one EVER. The external
antenna is hands down better. I assume you are doing this
for drag reasons? Well an external VOR antenna at 200 mph
cost you no more than 1/2 MPH. That is it. Also is you use
fiberglass element antenna (white) it blends well with fuselage.
My RV-4 was mostly white and antenna was on belly under
horz stab was white. You'll never noticed it on the ground.
STAY A WAY FROM THE WING TIP
COM antenna, they are terrible. Since most of us are using
GPS the VOR antenna is not critical but COMM is key to safety.
It's up to you and you can always add an external antenna. I'm
building a RV-7 and had a RV-4. HERE are some things to
recommend a pair of standard Cat Whisker VOR antenna:
Drag? Only 0.50 mph max at 200 mph
Racing? Removable in a minute (*depending how u mount)
Mount? Belly under tail or top of Vert Stab.
*Here is a pic of the belly mount on my RV-4
http://img239.imageshack.us/img239/4826/temp28st.jpg
Here is another builder's Vert stab mount (RV-9A)
http://www.n2prise.org/Photo2/DSCL0268.JPG
*I like the belly mount, shorter coax run, remove antenna
in a minute. Two screws, secure coax with safety wire and
stuff back in fuselage [quote][b]
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