Boston Albany A1 Berkshire Whistle Location

The whistle on the prototype looks like a short 5 or 6 chime whistle. Note, however, that there is NO cable, cord or shaft to operate the whistle, thus it must have an air operated "on-off" valve, controlled by the Engineer. The SP had these same "air operated whistles" and all the Engineer has is a little brass lever to push down on.

I would suggest visiting the P&D Hobby Shop web site, as they are one of the nation's largest dealer of Precision Scale brass investment casting for O Scale. I would think they could get you an "air operated short chime whistle".

Drill that hole.  Use some cutting fluid.  Personally, I would cut threads and screw the thing in, but adhesive will work if the hole is snug on the whistle shank.  No way could you glue it on the surface and have it stay put.

Opinion.

Boy, before I went drilling into the engine I would make sure that's the whistle. There must be better info on this engine. Don

Oh ye of little faith.

Here's a Berkshire they kindly tilted for us so you can see the whistle is in that area. Don

That is NOT a B&A Berkshire. Looks more like a B&M Berk, but the whistle may be in a completely different location.  I don't see that high pressure steam pipe running from the superheater header, up front, to the turret in the rear, as the B&A Berk has. Also notice the big Coffin Feedwater Heater, which overhangs the smoke box front, which is characteristic of the B&M Berks. 

Thanks for the follow up Hot Water. Thanks for the tips Bob. Great photo Don. Heres a photo of the k line B&M berk matching Dons derailment photo, if thats the whistle by the stack, I wonder why k line neglected putting a whistle on the B&A version, too difficult with the added piping?

Very visible on the Santa Fe version, but is it tied into the piping or the smokebox.