Question: What type of metal stud threads into the VMAR CNC metal clevis? Will imperial threaded rod work?

Answer: The VMAR CNC metal clevis is tapped for 2mm threaded studs. We make precision double ended 2mm studs in various lengths that work well with the VMAR CNC clevis and thread securely into VMAR inner plastic control rod. We have also found that our 2mm studs thread well into other brands of inner plastic rod as well, However we have not tested each and every alternative for compatibility with our 2mm threaded studs. Always test thorougly before and after flying... TUG TUG TUG!

Question: What type of plastic control rods do you use? Are they splined or not?

Answer: We have used a variety of different plastic control rods since inception in 1999. From mid 2004 onwards we standardized on a new inner/outer plastic rod set. The rod set is of our own design. The inner rod is splined, the outer rod is not. The inner rod accepts our 2mm threaded metal studs and most other brand of studs. Always test for a secure joint when using threaded metal studs.

Question: I have my own favorite control rod system that I would to install on my VMAR ARF. Can the VMAR factory control rod system be changed?

Answer: Yes

Better Answer: Yes, we use a plastic or metal inner rod sliding in a plastic outer tube. The outer tube will accomodate the inner yellow splined plastic rod from Sullivan. The Sullivan inner rod will in turn accept threaded metal rods or studs which can engage with either plastic or metal clevises. To install your preferred system, simply remove the clevises or EZ connectors from the factory rods and gently pull the factory inner rods out of the fuselage. Then install your preferred system.

Question: When I install my wing servo for the ailerons and/or flaps and/or flaperons the control rod appears to be either too short or too long to connect with the control horns on the control surface. What should I do?

Answer: Estimate how much too long or too short the control rods appear to be. If it appears that the discrepancy is about 3/4" then you likely have the servos installed in the wing the wrong way around. Rotate the servo 180 degrees and check again. Most servos have the output shaft closer to one end than the other end and by rotating the servo you in effect change the required length of control rod by about 3/4".