Alcochaser wrote:Forget about it..... the turbo on the SD45 series! Forget whine, forget howl... the correct discription is SCREAM.
3 SD45, one tight plate C tunnel, run 8, equals, a noise that words lack being able to describe! Except that you feel it inside of you, reverberating in the chest cavity of your body! Hearing protection definately required! THe F45 is even better, all that joyous noise comming from the engine room door.... ohh yeah... go IN the engine room of an F45 when it's running at Run 8.... (lol I absoslutely don't recoment that)
The F40PH is close behind the SD45, because it's an Turbo 645E3 motor pushed to 3200HP. That and that infernal alternator kept the motor screaming away at run 8 even during a station stop.
EMDs beyond the 50 series have too much noise cancelation devices to really hear the motor as clearly anymore.
Don't forget the nice growl a SD38 or GP38 type will make, especially if it's been converted from two stack to four stacks!
Loud is inside the EMD LaGrange Engineering train shed with the following tests being conducted:
1. An SD45 SS in load test N8, with all four cooling fans, and a test orface in the pnuematics
2. An SD 60 in load test N8 (don't notice the muffler), with all three cooling fans with the main reservoir open just enough to keep the compressor loading.
3. Some fool jerking on the horn handle
Loud & HOT is inside an Amtrak (Larger HEP generator) F40PH-2 in load test with the HEP connected to test grids in July.