Walthers Proto 920-49512 HO Scale EMD FP7/F7B Diesel Amtrak Phase I AMTK 113/167 Era_1934-1954 App provides PNP (picture-in-picture) option

App provides PNP (picture-in-picture) option for seeing views from both cameras at one time

Estes model rocket engines

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Walthers Proto 920-49512 HO Scale EMD FP7/F7B Diesel Amtrak Phase I AMTK 113/167 Era_1934-1954 App provides PNP (picture-in-picture) optionWalthers Proto 920 49512 HO Scale EMD FP7 F7B Diesel Amtrak Phase I AMTK 113 167 Providing enough steam to power train heat and some air conditioning systems on postwar trains taxed the standard water supply of EMD F units set up for passenger service, prompting EMD to rollout the new FP7 in 1949. Though outwardly similar, FP7s were actually four feet longer to accommodate bigger water tanks with a capacity of 950 US gallons. Standard passenger power