ScaleTrains Rivet 33633 N Scale GE ET44 Tier 4 Diesel "Heritage III" BNSF 3754 Era_1997 + along with its four-axle GP35

along with its four-axle GP35 sibling

As pointed-out by Jim Six in his Railroad Model Craftsman article

that is powered from an open channel on the radio system

Rapido 028020 HO Scale EMD E8A Erie Lackawanna EL 814

ScaleTrains Rivet 33633 N Scale GE ET44 Tier 4 Diesel "Heritage III" BNSF 3754 Era_1997 + along with its four-axle GP35ScaleTrains Rivet 33633 N Scale GE ET44 Tier 4 Diesel "Heritage III" BNSF 3754 Introduced in 2012, General Electrics Tier 4 GEVo Series represents the latest in diesel electric locomotive technology. The GE Tier 4 GEVo is designed to meet increasingly stringent Environmental Protection Agency (EPA) emissions regulations. The EPA Tier emissions standards are a series, or Tiers, of allowable emissions levels based upon a locomotives date of manufacture.