Rob:
I think there may be a little confusion here. To the best of my knowledge, CPR
steam locomotives used steam to make the whistle sound. I seem to recollect
that 2860
had a steam whistle which used an air-operated valve to sound. (2860 had two
steam whistles, which was unusual.) The only genuine air whistle was the cab
signal
whistle. That whistle used compressed air to sound. They were used on the
passenger-service diesels, too.
Joe Smuin
From: mailto:cpsig@xxxxxxxxxxxxxxx
Sent: Saturday, June 6, 2015 3:50 PM
To: cpsig@xxxxxxxxxxxxxxx
Subject: Re: [cpsig] Re: CPR Steam Locomotives equipped with air whistle
That surprises me a bit. I thought the signaling whistles inside the
locomotive cab and on the caboose were air whistles and not connected to steam.
Rob Kirkham
From: mailto:cpsig@xxxxxxxxxxxxxxx
Sent: Saturday, June 6, 2015 2:50 PM
To: cpsig@xxxxxxxxxxxxxxx
Subject: [cpsig] Re: CPR Steam Locomotives equipped with air whistle
First, all whistles are steam. Second, modern CPR steam engines had
air-operated whistles. All semi-streamlined engines would have them.
