MRC Sound Decoder Video

[John]

Supposedly this is to illustrate issues with the MRC decoder

[Mark5]

Hilarious!  ;D

I can hardly hear the "prime mover" but it sorta sounds like an EMD turbo whining in there somewhere.

[Ryan87]

besides the fact that a SD45 recording is coming out of a Dash 9....

[Ian MacMillan]

Sounds like the prime mover sounds remain constant while only the turbo whines up and down with the throttle.

[Iain]

Sounds like the prime mover sounds remain constant while only the turbo whines up and down with the throttle.

Ever listen to the sound of a Baldwin Shark go from idle to moving?  I'll have to look, but if I remember correctly off the top of my head you've only got a change of a few hundred RPM from idle to max speed, so you almost can't here a change in the prime mover.

It isn't relevant in this case, however; this appears to be an EMD reengined Dash 9.

[Ian MacMillan]

Sounds like the prime mover sounds remain constant while only the turbo whines up and down with the throttle.

Ever listen to the sound of a Baldwin Shark go from idle to moving?  I'll have to look, but if I remember correctly off the top of my head you've only got a change of a few hundred RPM from idle to max speed, so you almost can't here a change in the prime mover.

It isn't relevant in this case, however; this appears to be an EMD reengined Dash 9.

No I haven't but you are correct that your point has no point in this case.

Having sat in a turbo equip locomotive for 36 hours last week, I can tell you there is a noticeable change track side, in the cab, and standing on the pilot of the prime mover as well as the turbo.

[Hyperion]

Sounds like the prime mover sounds remain constant while only the turbo whines up and down with the throttle.

Ever listen to the sound of a Baldwin Shark go from idle to moving?  I'll have to look, but if I remember correctly off the top of my head you've only got a change of a few hundred RPM from idle to max speed, so you almost can't here a change in the prime mover.

It isn't relevant in this case, however; this appears to be an EMD reengined Dash 9.

While it is true that the RPMs of a locomotive don't vary all that much (generally only a range of about 500 to 700RPM), I guarantee you that the difference between idle at 300 RPM and notch 8 at 900RPM is, quite literally, deafening.

[Iain]

Sounds like the prime mover sounds remain constant while only the turbo whines up and down with the throttle.

Ever listen to the sound of a Baldwin Shark go from idle to moving?  I'll have to look, but if I remember correctly off the top of my head you've only got a change of a few hundred RPM from idle to max speed, so you almost can't here a change in the prime mover.

It isn't relevant in this case, however; this appears to be an EMD reengined Dash 9.

While it is true that the RPMs of a locomotive don't vary all that much (generally only a range of about 500 to 700RPM), I guarantee you that the difference between idle at 300 RPM and notch 8 at 900RPM is, quite literally, deafening.

A BLW 600 series diesel idles at 315 rpm, maxes out at 625 rpm.  Most Baldwins had throttles without notches.