Hello!!
I have a ARF Nobler for more than 12 years, When appeared first time on topflite catalog, I bought one without hesitatio. The first time i installed a Fox 35 stunt in the nose... but i had a lot of problems with this engine and the innverted position, after that, changed the fox for an OS Max 35 CL , but I could never make a flight to the speed I wanted. I was very disappointed, I had flown other Noblerīs but could not get a good fly with mine.
I read an article in internet, I forget who it was, and said you could use a .25 engine in the Nobler ARF because the power of a .25 now is similar or greater than the power of a .35 of those years. I had a new Thunder Tiger .25 CL who had never used it, so I decided to try. My Nobler now flies just the way I wanted it, with a propeller BYO (Brodak) 9x5 and 5.5 seconds per lap. The engine has good power and my Nobler is capable to do the FAI pattern smoothly even on windy days.
This video, is from the first fly with Tunder Tigher .25