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Post by fordfocus54 on Jul 27, 2015 18:30:59 GMT
Many model engineering suppliers offer 3 chime whistles for sale, usually in two sizes, has anyone fitted one of these to a loco and do they sound reasonably authentic? I would like one for my "Brit" but would like to know your thoughts on this before I go ahead.
Frank. |
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Post by fordfocus54 on Aug 27, 2015 19:10:57 GMT
OK, it's fairly obvious that there's not much to be said about over the counter chime whistle's!
Does anyone have a drawing for one that sounds half decent?
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Post by ejparrott on Sept 9, 2015 11:03:14 GMT
Yes, Derek Brown did one, it's in ME, 19 April 2002, Page 234-236. It should produce the exact note for an A4 if I remember right, I'm sure that's what he designed it for.
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Post by fordfocus54 on Sept 9, 2015 13:59:36 GMT
Thank you so much, I was beginning to think I would never get a reply!
I'm sure one of our club members will have a copy of ME for that date, thanks for the information.
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Post by fostergp6nhp on Sept 9, 2015 18:43:39 GMT
The A4 and the Brit/Clan/73xxx whistles were the same except the Br made jobs were a slightly different grade of bronze, but they sounded different on a Brit due to overblowing/squeeling having been made for a working pressure of 225psi rather than the 280? Of the Brits.
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pault
Elder Statesman
Posts: 1,497
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Post by pault on Sept 9, 2015 19:08:00 GMT
The A4's and Brit's both had a WP of 250 psi
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Post by ejparrott on Sept 10, 2015 9:20:22 GMT
The A4 whistle on TR 3 and the Brit whistle on TR 6 do sound different to the tuned ear, however we don't run at the same boiler pressures anyway
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Post by richardwilliams on Nov 28, 2015 16:44:54 GMT
Interesting discussion. On my 5 inch Brit I fitted a 7 1/4 inch gauge chime whistle (between the frames) Cost a bit (circa £50 now I believe) so taking a risk it would work. On good pressure (just before blowing off) it works well. I think I obtained it from Blackgates.
Key issue is to ensure the pipe from the whistle valve at the front is large enough, and lagged from where it disappears below the running board.
Richard
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Andrew C
Part of the e-furniture
Posts: 447
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Post by Andrew C on Jul 18, 2017 15:07:58 GMT
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Post by Jim on Jul 24, 2017 8:10:51 GMT
I'm afraid I forget look past the General Chat most time so I'm probably a bit late for this but I received the drawings for a nice full throated Britannia three chime whistle from a fellow forum member, was it you Frank?
Anyway it sounds just right and under 80psi can be heard 3 houses away, I haven't tried it in steam yet. I've mounted it between the frames under the smoke box.
To service if needs be all I need to do is drop the front bogie to give me free access.
My only concern at this stage is that condensate may cause problems in the long steam line from the cab, if it does I'll fit a snifter type valve to let the condensate drain out but seal under pressure.
Jim
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