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HelicopterMain Discussion › Antenna tied to boom supports
03-28-2005 06:44 PM  13 years agoPost 1
Lock-Tite

rrVeteran

Quebec, Canada

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I got tired of seeing the antenna hanging so I tied it to the boom support, is there any known issues for not doing that ?

3 years ago I did the same with my 1st heli (electric) and never had a problem.

Your experience ?

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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03-28-2005 06:48 PM  13 years agoPost 2
w.pasman

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Netherlands

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I think its better to keep the antenna away from conductors. Conductors can reduce the range of the receiver if the antenna is too close to them.

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03-28-2005 06:50 PM  13 years agoPost 3
Wisdom-Seeker

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Danville, CA

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IMHO, it's never a good idea to run an antenna next to a metal surface.

--

Wisdom-Seeker
Protest letter to insurance co.: What do you mean "Act of God"?

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03-28-2005 06:54 PM  13 years agoPost 4
Leif

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USA

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While you can probably get away with routing your antenna past a metal component without issue, routing it directly parallel to a metal tube as you have will reduce the effectiveness of the antenna.

Not saying this will cause an issue, since typically our models have very efficient radio circuits. However, in a weak-signal or partial-interference situation this could bite you....

If you're concerned about routing, get a base loaded whip antenna (Deans or Revolution both work good).

Leif

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03-28-2005 07:02 PM  13 years agoPost 5
matey

rrNovice

Luton, Bedfordshire UK

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Hi Lock-Tite,

I have the aerial on my Raptor 50 routed exactly like in your pictures, cable tied to the boom supports. I've never had any problems in the two years I've been flying.

Cheers

Mark

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03-28-2005 07:19 PM  13 years agoPost 6
nojohnny101

rrElite Veteran

10 miles north of Cincy, OHIO

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hey
i had the same issue kind of as you on my raptor 30v2 and the last 3 times i had crashed my antenna got chewed up or chopped off...
i finally just said screw it and got the base loader antenna....
they are a very cheap upgrade and very easy to mount/....just mount and leave it alone!!

this is the one i got:
http://www4.mailordercentral.com/he...p?number=101565

if i were you i would strongly consider

Thanks
~Will~

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03-28-2005 07:19 PM  13 years agoPost 7
Lock-Tite

rrVeteran

Quebec, Canada

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Thanks for your answers.

I never tought about crashing... but the wire is free in there so it would not get broken during a crash. (I think)

Doesn't a Base Loaded Antenna sit inside the canopy, close and parallel to the frame ?

Comparing a Base Loaded Antenna to a normal wire antenna, do both have the same range/receptivity ?

Anyone has a picture of a Base Loaded Antenna installed ?

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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03-28-2005 07:19 PM  13 years agoPost 8
wleew

rrNovice

Pittsburgh, Pa.

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NOT a good idea running the antenna right along side metal tubing. Tubing can create a shadow or a dead spot along the other side. Remember. the tubing acts as an antenna also. Get a base loaded verticle ant from Horizon hobbies. Theres a brand called Revolution. They make antennas for 72 mhz and 50-52 mhz. I use the Ham band antennas.
Wheres theres lead, theres luck

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03-28-2005 07:23 PM  13 years agoPost 9
nojohnny101

rrElite Veteran

10 miles north of Cincy, OHIO

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hey
on the baseloader antenna's instructions that i got...i said as long as you keep it away from being mounted directly next to your reciever than you shoudl be fine....
they CAN mount under the canopy but dont' have to....i have mine mounted on the front skid (sry no pic) and it sticks up into the canopy....work very well
i'm pretty sure peopel have reported better range with the whip antennas.....

Thanks
~Will~

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03-28-2005 07:38 PM  13 years agoPost 10
Leif

rrElite Veteran

USA

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I mount my base-loaded antenna between the landing gear, using the rear hole to hold the end of the antenna.

On my Evo, the landing gear were too far apart, so I added a small section of antenna pipe to hold the end. This is the Dean's one-piece.

Leif

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03-28-2005 07:43 PM  13 years agoPost 11
AlanR8

rrKey Veteran

Saddleworth near Manchester (UK)

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Check out raptortechnique.com for their thoughts. I run my aeriel out the tube on the struts and have a couple of lacky bands coming from the horizontal stab to connect to the wire WITHOUT putting the wire under tension.

Works for me and the advantage is you don't stand on the wire whilst starting!

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03-28-2005 08:14 PM  13 years agoPost 12
Lock-Tite

rrVeteran

Quebec, Canada

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Ok guys you win, I have un-tied the antenna, I'll get a BLA.

Thanks

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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03-28-2005 08:16 PM  13 years agoPost 13
Jasper7

rrKey Veteran

Birmingham , UK

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same as AlanR8 for me

I use an elastic band with the areial routed through a servo arm hole, through the band and back through another hole. With the bad looped arond the top of the boom arm.

Keeps it nice and tidy and also acts like a spring loader.

also use an arm through the frame to stop the antenna being ripped out of the Rx.

Steve

Jasper 7
T-Rex 700N
T-Rex 600N
T-Rex 450Pro

Citizen Number: 00212

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03-28-2005 08:45 PM  13 years agoPost 14
wleew

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Pittsburgh, Pa.

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One more thing on antennas.. When your mount the base loaded one, mount if vertically. Dont mount it horizontaly. It becomes a Directional antenna it will have dead spots. Vertical, its omnidirectional, it'll receive equally in all directions.
Wheres there lead, theres luck

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03-28-2005 08:52 PM  13 years agoPost 15
pcliftonjr

rrKey Veteran

Phoenix, AZ

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...so I tied it to the boom support
That's how my antenna it mounted; pretty much everyone who flies Raptors here routes their antennas that way. It works pretty well for me...

Paul

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03-28-2005 08:59 PM  13 years agoPost 16
PietervA

rrVeteran

New Zealand

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This has been discussed before, in more detail than we could manage!

I guess any machine is a compromise of theory and practicality. Try the base loaded antenna. It'll work fine. So did mine, until it started glitching occasionally, and a routine preflight range check indicated a huge "hole" behind the heli. I had a Revolution mounted on the skids, and replaced it promptly with the routine aerial (thanking myself for those mundane preflight checks).

The fact that most experienced pilots have an aerial trailing rearwards must tell you something, surely

My aerial tube is tied to the boom support, as is yours. It works and looks neat, and the range has never been an issue. But it's not ideal.

If in doubt, do a range check, having someone rotate the heli as you do so. Aerials, as you know, are directional. A search on RR will give you some pretty interesting stuff from a battalion of radio fundis.

Cheers

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03-28-2005 09:04 PM  13 years agoPost 17
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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i have been flying my Vigor the entire time with the antenna mounted to the carbon boom supports. and nearly everyone i know around hear does the same thing with no issues.

if running parallel to the aluminium boom is such a big deal, then thats just an excuse to upgrade to a carbon one

Shawn
Team Leisure-Tech
Team HelixRC

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03-28-2005 09:23 PM  13 years agoPost 18
Leif

rrElite Veteran

USA

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One more thing on antennas.. When your mount the base loaded one, mount if vertically. Dont mount it horizontaly. It becomes a Directional antenna it will have dead spots. Vertical, its omnidirectional, it'll receive equally in all directions.
You want to think about that one again wleew? An antenna is either directional or not, regardless of it's orientation in 3D space. A base-loaded antenna is omnidirectional, which is the generally accepted term to apply to any linear-shaped radiating antenna with the typical "rotated cone" radiation pattern. This is opposed to a unidirectional antenna that radiates in a narrow directional field pattern. (single-cone pattern).

If you're flying 3D, then any orientation will be possible, including having the top of the canopy facing you. It's accepted that a base-loaded antenna RF strength pattern will be strongest in a conical sweep around the length of the antenna. This makes for a weaker field-strength toward the ends... not dead, just weaker.

I've been flying base-loaded antennas for years. Never had any range problems. Are the full-length antennas more effective? Probably yes. Can you run an antenna wire parallel to a metal part? Probably yes.
Does everyone have their own opinion? DEFINITELY YES!

Leif

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03-28-2005 09:31 PM  13 years agoPost 19
FBaity

rrApprentice

Tuscaloosa, AL

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I have run my antenna along the boom support for years in several helis and never had a problem.

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03-28-2005 09:34 PM  13 years agoPost 20
shuttlepilot

rrElite Veteran

Mullins, South Carolina

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I ran an antenna through fuel tubing along the boom support. The supports were carbon fiber, and the glitching had no end. I then ran the antenna trailing through a piece of stiff plastic tubing and had no problem. I have since went to a Deans base loaded antenna. Not a glitch or problem with it. I do inspect it before the first flight of the day for cracks and what not. I know some people say that the base loaded antennas have range problems, but I have not experienced it. I can tell you one experiment that I have done with base loaded as well as conventional antennas. Take your heli and do a standard range check with it sitting on the ground, then take it and put it up on a picnic table and see if you have any difference. I noticed a few more paces of range with the heli elevated. With that in mind, range should be even better in flight..

Gas is Great
Camper Fuel is Better!!
QWW Helis

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HelicopterMain Discussion › Antenna tied to boom supports
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