michael wood

My Feedback: (1)

This is the second one I've built and was wondering what everyone used for a control rod for the rudder. I want to move the servo in the servo tray in the fuselage. There is A control rod tube all ready installed there. I am trying to keep the weight down and I know from my last one 4-40 rods vibrates real bad. I will be using A MT35 gas engine. And if I remember right I had to add about 1 1/2 lbs of weight to the nose to balance it. I thought about A pull pull set up. I've read all the post I could find and did not see anything on A pull pull set up

Granpooba

My Feedback: (5)

Instead of going thru the trouble of installing a pull/pull system. I would think about just bracing the control rod tube, to keep it from vibrating. Just my personal thought and opinion.

flyinwalenda

My Feedback: (5)

Make a carbon fiber push rod. Super strong and no vibration. Get a CF tube the size to fit inside the casing and epoxy a piece of threaded rod in each end of the CF tube.

thailazer

Another option would be steel wire inside a nylon tube. Secure the tube well and keep the run as straight as possible. Very low friction that way and positive control. I know what you mean about vibrating push rods as I am having that problem with my J-3 Cub at the moment. Having that mass supported by the wire links is just asking for problems.

michael wood

My Feedback: (1)

carbon fiber rod sounds good to me. The tube is supported in certain places along the fuselage don't know how much 4-40 rod I will have sticking out the end. Well scratch that idea. The tube goes straight back and does not come out the fuselage if it does I cant see or feel it. I used a nyrod in the tube to see how long it is. Guess I will put the servo where it is suppose to go. I will use carbon fiber tubes for the push rods Thanks Michael

flyinwalenda

My Feedback: (5)

Make sure to clean/rough-up the inside of the CF tube with a round file so the glue will hold.