Prototype History: We have designed our fan packages to retro-fit existing fan housings from such locomotive manufacturers as Kato, Atlas, and Life-Like, among many others. What fan style is correct for your project? We're often asked what style of fan grill is needed for a specific project. With so many variations of locomotives produced it is impossible to give a single, short answer that is always correct. With that said, this is what we DO know: - SD40/GP40: This series of locomotives all use 48" fans for both radiator and dynamic brake cooling. For these models, you will ned BLMA #81-84 - GP30/35 & SD35: These locomotives use a combination of 36" & 48" fan grills. Our 36" Fans are BLMA #87-88 and our 48" Fans are BLMA #81-86. - SD70-SD90: We've created a Modern EMD Fan Package for these models as they all utilize larger 53" radiator cooling fans and one single 60" dynamic brake cooling fan.
