RE: “New” 28% Wild Hare Extra 300 84”– Red Black Yellow
There are three ways to make extreme duty pushrods that I know of.
1. Use Central Hobbies titanium rod ends and carbon fiber tubing. Measure everything, cut the CF to length, clean everything with rubbing alcohol, glue the ends in with JB Weld. This is my favorite home-made pushrod.
2. Use the all-thread in Tom's hardware kit along with the CF rod for strength. Measure the rod with the ends attached to the control surface and the servo arm to get the overall length. Cut the all-thread. Cut the CF tube short enough that you can get your ball links threaded all the way on with out hitting the nylon nuts, then assemble all the parts and you have a strong pushrod.
3. Use Troy Built Models steel rod ends and carbon fiber tubing. Measure, cut the CF, clean everything with rubbing alcohol, then JB weld the metal rod ends on. These are black and blend in the most.
Of course, the BEST solution is if you can find the right length Hanger 9 Titanium Pro Links and use those for the finest adjustments (less than half a turn) and suburb looks! Measure from center hole to center hole (center of pushrod connector screw on flying surface ball link to center of hole in servo arm) to get the length and pick the one that falls in the middle of the range required.
The key is this: If you're going to JB weld something, clean the CF dust off first with rubbing alcohol! That way the pushrod will NEVER pull loose. I've tested mine by pulling on one with all my might...it didn't budge.
By way of necessity I'll be using the H9 Titanium Pro Links on the elevators, Tom's hardware pushrods on the ailerons, and TBM's push rod ends on the throttle and choke. What variety![&:]
I chose to use the hole on my servo arm that corresponded to one inch away from the center of the screw hole and used 1-1/4" from the center of the aileron to the center of the attachment bolt to give the servos a little mechanical advantage. I still get the recommended throws from the manual...BTW 12 degrees up and down on the elevator is great for low rate ops, plus takeoff and landing.