A question for all who have had good success with smoke is there any reason i can't use 3/16th brass tubing to the rear of the turbine instead of 3/16th stainless steel tube. This is to go on a Jet Cat 120 Mounted to a Roo

Brass melts at around 900 degrees C, stainless is around 1600 degrees C. Engine runs up to 900 degrees C have been seen, but probably not common. By the time you get that hot air off the tailcone and meeting your brass tube, you will probably be ok. But I would just use stainless, I mean, it's easy enough to get and for that application CHEAP!

Mat, do it all the time. Have never had a problem. Works very well. You can also solder your mounts for the tube to it. Good luck.

thanks for the info guys i will go with the brass tube for now as that is readily availible, and the next time im placing an order to the uk for modelling bits ill order some stainless tube to try.

Have used 1/8 brass on three systems now witout any problems.