swoofty
SP GP40X top
The GP40X was EMD's testbed for the future GP50 and introduced the unpopular HT-B truck. The 'elephant ears' version shown here was an experiment in normalizing the tunnel motor concept. The ears eventually were removed and the HT-B trucks were never reproduced. I needed a powered SP unit to haul around some heavy trains so all those unique qualities fit the bill just right. Originally I wanted to build the UP version, but the SP is more iconic with those elephant ears. The UP version will follow someday.
SP GP40X top
The GP40X was EMD's testbed for the future GP50 and introduced the unpopular HT-B truck. The 'elephant ears' version shown here was an experiment in normalizing the tunnel motor concept. The ears eventually were removed and the HT-B trucks were never reproduced. I needed a powered SP unit to haul around some heavy trains so all those unique qualities fit the bill just right. Originally I wanted to build the UP version, but the SP is more iconic with those elephant ears. The UP version will follow someday.