From Russell Underwood on the Ship It on the Frisco Facebook group: "Does anyone know why the Frisco did not purchase any GP30s, which seemed so popular with most other railroads? Were they given a much better deal on the U25Bs by GE? Curious..." Karl Brand's response; " The real question might be why didn’t the Frisco buy GP-20’s Ken Wulfert noted the following: "Below is the text of an interesting posting by Rob Sarberenyi on the on-line Diesel List. He is reviewing lists of locomotive orders that were cancelled before they were built. Looks like, per Rob, the Frisco ordered eight EMD GP-20's. I may have forgotten as this was long ago, but I'm not sure I knew that! I assume they would have been in the black/yellow scheme if delivered as the orange/white did not show up until later on GP-35's and U25b's. (It was copied from the EMD demonstrator scheme on the GP-35 and DD-35 models). Ken Following is Rob's posting: ................................................................................... Following is what I have for CANCELLED orders for EMD GP20s. There could possibly be others, this is what I have found so far: Qty Road Order # Builder #s Notes 4 SLSF 7613-01 to -04 27003-27006 Frisco 4 SLSF 7614-01 to -04 27007-27010 Frisco Remember, these units were _never_ built. Rob Sarberenyi” My theory is as follows: It can’t be a coincidence that the GP-20 order was for 8 units, and the first order for the high-nosed U-boats was for 8 units. The story goes that the Santa Fe was running the wheels off the Frisco covered wagons that were dedicated to the run-through trains. Not only were the units accumulating mileage at passenger unit rates, the Santa Fe was running them at speeds that exceeded the Frisco gearing. The Santa Fe also preferred the units with dynamic brakes, so in theory, the number of units that the Frisco could put into the pool was limited to the F-9Am and associated F-9B units. My theory with regard to the cancellation of the order centers around the difference in the horsepower increase for a given turbo-charged unit. A turbo-charged GP-20 would bring an increase of only 250 HP per unit over a F-9 unit, and a GP-30 would buy an additional 500 HP per turbo-charger over a F-9 unit. Enter the U25B, which would bring an additional 750 HP per turbo-charger. Throw in 70 mph gearing, and the Frisco had a unit that was perfect for high-speed, run-through service. EMD wouldn’t produce a comparable unit until the GP-35, which arrived 3 years after the first U-Boats plied Frisco rails The ATSF placed 4, 6-unit covered wagons into the pool, and the Frisco placed 2, 4 unit sets of U-25B’s, and 1, F-9 set that consisted of 6 units. The June 1962 TRAINS magazine has a two page spread of F-9Am, 5007, leading 5 other F-9’s and Birmingham-bound CTX as it climbs Cajon Pass. The associated caption by David P. Morgan, claimed that the units were running 5,000 mile per week, and 20,000 mile per month."