Just thought I would share photos of my OS 160 exhaust system and round aileron link struts. This is the Cox ARF. It is my first, and I think last, ARF. I am too particular to live with things I don’t like. Have a ton of hours in it over the last three months. Reworking the inside of the nose it like building a ship in a bottle. (I know, the ship is built outside the bottle but is still a real pain to do.)

The exhaust pipes are made from chrome plated 3/8” copper faucet line purchased from the big orange store. (Thanks for the tip Bill) It took a few tries to get them bent in a workable shape. I have an assortment of tubing benders and finally figured out how to get the tight bends without kinking this tubing. I used copper pipe hanger strap to make the brackets that are silver-soldered to the pipes and fastened to hard points on the firewall. The pipes are a close slip fit over the OS exhaust stubs and the engine is free to move a little without any additional stress from the self-supported extensions.

When I checked incidences I found that with the bottom wing at zero, the top wing was also at zero, but with a ½ degree twist on the right side that resulted in wash-in. After a day of shimming and trimming struts and cabanes the top wing is now at –1 degree from one end to the other. The stabilizer is at +1 degree. As a result of these “adjustments” and my kit aileron struts were at their limit for length adjustment. I decided to go with round links. They are made from a Sullivan golden rod ribbed core and sleeved with 3/16” brass tubing. The brass tubing does not carry any load and is held in place with a few dabs of epoxy applied to the rod when sliding it in. It only serves to keep the push rod straight and add diameter to the link. Picture shows one assembled and one ready to be. They will be painted to match the covering.