Iam building my first gas engine plane. It is a Yak with a 26 CC RCGF engine and I am using 2.4 radio. My question is what material should my pushrod to the throttle be made. Should Iworry about interference? I've heard some say that it is not a problem with 2.4. One guy told me he had the golden rod on his gasser and the heat from the engine softened it and it bent. Your thoughts?

of the gassers I see, they all pretty much use golden rod, that's what I went to when I redid my throttle linkage. wit an engine with side intake and side exhaust you shouldn't have too much of a problem with heat on it. </p>

I prefer the most rigid and lightest material that will suit the application. The products used to connect the rods to other linkage components has the most influence on potential rfi problems. Avoidance of metal to metal connections is critical to eliminating "noise" from various causes.

There may be helpful information in here worth reading...... http://www.rcuniverse.com/forum/m_8673009/tm.htm

I have two RCGF 20 cc engines and use golden rods on both of them. The throttle arm is too short on these carbs for precise throttle control, so I made longer throttle arms out of aluminum, over double the lenght of the original. Also you need to set up your linkage so you are getting less movement on the low end and more on the top end. Set your servo arm up so its moving about 45 degrees to the line of movement of the rod at the bottom end and near 70-90 degrees near the top end. That way it wont be too sensitive on the bottom end and more responsive on the top. Have not had any problems with the plastic push rods. I use both a 2.4 radio and another on channel 17 and have had no radio problems.</p>

I personally use a short 4 40 rod with plastic ball joints or the plastic ball and cup snap on connector.   As long as you have plastic on both ends and the metal doesn't touch any other metal it's fine.  72 you have to be careful, 2.4 is more forgiving but not fool proof.

I use 4-40 rod andball links. As mentioned above, I also lengthen the stock arm to about twice it's stock length for better resolution.

Edited to add: The ball links Iam refering to are the ones Jake calls plastic rod ends and mine are made by DuBro.