On GP/SD50-up, the dynamic brake fan is hard to spot unless you're higher than eye-level with the roof: It's just behind the cab and somewhat recessed.
bubbajustin So for example on a SD50, The three big fans on the far end are the Dynamic break fans
So for example on a SD50,
The three big fans on the far end are the Dynamic break fans
No, the three large fans at the rear of the SD50 long hood are the radiator fans. The dynamic brake resistor grids are located immediately behind the cab and in front of the central air intake.
Mike
The three big fans on the far end are the Dynamic break fans, and the 2 up front are what, the air intake for the engine?
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cx500BamaCSX83I know this might have been asked before, but I'm going to ask it again since I can't find any evidence of it being asked. What ever happened to the "classic" EMD dynamic brake blister found on engines up to the SD40 and/or SD40-2? I'm going to guess that as the dynamic resistors got better, they probably got smaller, which meant that EMD could move the dynamics into an area forward of the air inlet and get rid of the blister found on earlier units. If anyone could help me out on this one, it would be great. The blister went when the dynamic brake resistors and fan were moved to the end of the locomotive behind the radiators. It results in a longer locomotive, but the grids are no longer sitting right above a hot engine.John
BamaCSX83I know this might have been asked before, but I'm going to ask it again since I can't find any evidence of it being asked. What ever happened to the "classic" EMD dynamic brake blister found on engines up to the SD40 and/or SD40-2? I'm going to guess that as the dynamic resistors got better, they probably got smaller, which meant that EMD could move the dynamics into an area forward of the air inlet and get rid of the blister found on earlier units. If anyone could help me out on this one, it would be great.
I know this might have been asked before, but I'm going to ask it again since I can't find any evidence of it being asked. What ever happened to the "classic" EMD dynamic brake blister found on engines up to the SD40 and/or SD40-2? I'm going to guess that as the dynamic resistors got better, they probably got smaller, which meant that EMD could move the dynamics into an area forward of the air inlet and get rid of the blister found on earlier units. If anyone could help me out on this one, it would be great.
The blister went when the dynamic brake resistors and fan were moved to the end of the locomotive behind the radiators. It results in a longer locomotive, but the grids are no longer sitting right above a hot engine.
John
Or right behind the cab for SD50/60s. The grids actually got bigger not smaller, the blisters were due to the location above the diesel engines and their exhaust manifolds.
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