A shout out to Mike Regan - If he is still around. There's been many mentions of rapid machine gun chuff on the atlantic steamers. Many have mentioned the chuff switch adjustment. But, I think it goes beyond the chuff switch.
I mentioned this issue to mike regan at York a while back. I'm pretty sure I understood his response clearly? I believe he stated the microsowitch is only used for the intial chuffs when starting. Then there is a signal on the motor sensor board that takes over. I believe John's smoke puff generator functions similiar?
I would really like to find out if this is the case. As, I have one or two units there is no way its the microswitch. IMHO