Don't forget that the A3 is a three cylinder locomotive and it should sound a lot different to a two cylinder machine. You may have difficulty finding one that sounds right.
This was because when setting up the valves on the conjugated valve gear, they never got it absolutely right and the exhaust beats were not quite even, hence you got the characteristic Gresley syncopated exhaust with three beats to the bar. One of the three beats always sounded harder than the other two.
This was not so evident if the locomotive had recently been in the works and the valve gear had been set up by a really skilful fitter, but the beat developed thereafter.
In theory the same should apply to other three cylinder engines such as the LMS Jubilee.
Broadway Ltd have a sound sample of a Norfolk and Western Class A 2-6-4 which has a three cylinder beat, but the whistle is entirely wrong.
Colombo
This was because when setting up the valves on the conjugated valve gear, they never got it absolutely right and the exhaust beats were not quite even, hence you got the characteristic Gresley syncopated exhaust with three beats to the bar. One of the three beats always sounded harder than the other two.
This was not so evident if the locomotive had recently been in the works and the valve gear had been set up by a really skilful fitter, but the beat developed thereafter.
In theory the same should apply to other three cylinder engines such as the LMS Jubilee.
Broadway Ltd have a sound sample of a Norfolk and Western Class A 2-6-4 which has a three cylinder beat, but the whistle is entirely wrong.
Colombo