PULL PULL WIRES. DO THEY INTERFERE WITH RADIO ?

[SpaceCowboy]

Hi Guys ; Does anyone know if those pull pull wire outfits interfere with the
radio signal ?

In the manual for my Yellow Aircraft Spitfire they call for a kevlar pull pull system. I would rather go with a wire cable than kevlar if it would be ok.

I would think it would be ok providing the ant. is kept a fair distance away from the cables , but I want to play it safe on this size of model.

Any comments would be appreciated as usual.


Regards; Mike.

[Gary Maker]

Last spring I assembled a Dave Patrick Ultimate Bipe for a friend. The pull pull system uses very finely stranded stainless steel cable.

If your not familiar with this plane then let me tell you this: It uses a pull pull system for the rudder AND a double pull pull system for the elevators. In all there are 6 cables chriscrossing back and forth inside the fuse. The antenna is fitted INSIDE the fuse in a nylon tube running from the servo/Rx compartment to the tail of the aircraft.

He has flown this plane many many times and has NEVER had any kind of interference problems as a result.

There are an increasing number of planes being designed with pull pull systems and many more folks converting to pull pull to eliminate the need for two servos in the rear of the plane and replacing them with one servo in the main compartment and using pull pull.

If interferance was any kind of a problem I don't suppose they would be so popular and I'm sure we would have heard about it by now.

I've used this system many times successfully in the past and plan on building my new IMAC plane with pull pull for competition. I say go for it and build the pull pull system and stop worring. All the best with your new Spitfire!

[SpaceCowboy]

Thanks for the info Gary. I just like to get it right the first time. It's a habit I have from the business I am in . 8)

[cplant]

Another thing to do as extra insurance is to put a length of nyrod tubing over one of the cables. As I understand it this will isolate it from creating any interference with the other one. I've seen this setup on several large aerobatic models using steel cable. They also had the antenna sheethed in nyrod tube.

[Gary Maker]

SpaceCowBoy

Well, I ask my share of questions here on RCCanada. Even though I have an idea of how to do certain things, it always surprises me the input I get from folks who offer a helping hand. And I pretty much always learn something that helps me do the job just a little bit better than my planned way.

There is a great wealth of knowledge here and folks are usually more than pleased to share it with you so why not take full advantage of it? Isn't this just the greatest site?

[Kevin McGrath]

I use pull pull wire setups in several giant models with no problems.
Any signal problems I have ever heard about with linkeages or antennas have to do with metal to metal contact where vibration comes into play or continuos runs of wire as in guy wires on the tail feathers forming a diamond shaped antenna.

[SpaceCowboy]

SpaceCowBoy

Well, I ask my share of questions here on RCCanada. Even though I have an idea of how to do certain things, it always surprises me the input I get from folks who offer a helping hand. And I pretty much always learn something that helps me do the job just a little bit better than my planned way.

There is a great wealth of knowledge here and folks are usually more than pleased to share it with you so why not take full advantage of it? Isn't this just the greatest site?

:TU: You have that right Gary.

RC CANADA is a great site with a great bunch of modelers. :cheers:

[airframe]

Go with the Kevlar material. I've been using Kevlar pull-pull for a few years and I've found that it is more temperature stable than other systems. It's also lighter, easier to work with and won't interfere with your RX. I usually buy the Sullivan package, it has everything in there you require to setup a system.

Mike Sebastien

[ronm]

The kevlar works very well.
Just be sure it does not rub anywhere, it will wear out quickly.

Ronm

[PurgatorY]

If you want to use Kevlar, get this Kev-Cord stuff from ACP.

http://www.acp-composites.com/acp-cord.htm

Because its got a coating on it fraying is much less of an issue :)

[ronm]

Thanks Chad, I heard about that stuff.
I think it's the way to go. Strength, lightness, durability, no radio issues.

Ronm

[Gary Maker]

Just to add to my previous comments, the best pull pull cable I've seen comes with the Dave Patrick ARFS. It is a very small diameter cable but it has something like 50 strands to make up the cable and I believe its coated with a nylon substance if I'm not mistaken. Its super light weight and super strong.

I've never used the kevlar cable but I've not heard of any radio issues with stainless pull pull cables and have never experienced any with my setups.

I guess its like the old question of whats the best manure to put on your garden. Some like to use Horse, some Cow and others Pig. I thinks its just a matter of personal taste! :wink:

[Dennis 9412]

I guess its like the old question of whats the best manure to put on your garden. Some like to use Horse, some Cow and others Pig. I thinks its just a matter of personal taste! :wink:

Trust Gary to bring manure into the picture! Must be a throwback to his farming days!! He He!!

[SpaceCowboy]

That was a great analogy Gary :yuk: :wink: