Hello everyone,
I wanted to install 4 chuffs on this engine, and couldn't decide what method to use. Being this engine has no trailing truck wheels too install magnets on, and the cherry switch is very difficult to get too without gutting the insides to reach the cam under the cherry switch, I decided too use the front drive wheel, I was able to install 4 magnets on the inside surface of the drive wheel at 12, 3 , 6 and 9 . There was just about enough room between the drive wheel and the chassis, I just had to file the magnets down a bit to insure they wouldn't hit the chassis. Then I simply installed a reed switch on the underside of the chassis and netted 4 chuffs per revolution. Also While I had the shell off I upgraded the smoke unit. The 4 chuffs are right on the money.
Thanks for looking,
Alex
The drive wheel conveniently had marks at 12, 3, 6 ,9
Magnet installed
Reed switch installed under chassis