Re: Open Hopper Turned Covered Hopper?
The RF&P October 1926 ORER listing includes two hopper series.
3401-3505 :: 100 cars with 1667 cubic capacity, 30-foot interior length, and 10-foot height to eave
3506-3590 :: 80 cars with 1880 cubic capacity, 30-foot, 6-inch interior length, and 10-foot, 10-inch height to eave
I suspect RF&P sand car 7006 from the photo on eBay was converted from a hopper in the 3401-3505 series. Note the angle of the center slope sheets is similar to that used on earlier hopper designs. Here's the link to RF&P 7006 again.
From: STMFC@... [mailto:STMFC@...]
Sent: Tuesday, September 26, 2017 6:28 AM
Subject: Re: [STMFC] Open Hopper Turned Covered Hopper?
Upon magnification, the built date looks like 3-22. The heavy end sills are similar to pre-USRA hopper designs. The ladders remind me of a B&O hopper class.
Here's an RF&P hopper with more of a USRA look. You might need to copy the link into a WORD doc to make it complete.